/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:45:26,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:45:26,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:45:26,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:45:26,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:45:26,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:45:26,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:45:26,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:45:26,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:45:26,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:45:26,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:45:26,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:45:26,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:45:26,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:45:26,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:45:26,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:45:26,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:45:26,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:45:26,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:45:26,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:45:26,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:45:26,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:45:26,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:45:26,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:45:26,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:45:26,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:45:26,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:45:26,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:45:26,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:45:26,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:45:26,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:45:26,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:45:26,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:45:26,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:45:26,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:45:26,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:45:26,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:45:26,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:45:26,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:45:26,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:45:26,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:45:26,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-26 20:45:26,973 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:45:26,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:45:26,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:45:26,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:45:26,975 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:45:26,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:45:26,975 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:45:26,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:45:26,977 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:45:26,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:45:26,977 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:45:26,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:45:26,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:45:26,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:45:26,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:45:26,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:45:26,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:45:26,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:45:26,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:45:26,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:45:26,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:45:26,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:45:26,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:45:26,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:45:26,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:45:27,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:45:27,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:45:27,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:45:27,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:45:27,295 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:45:27,295 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2019-12-26 20:45:27,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cd206a8/8b4e94ff789e44ecb6d61ed46b046e9e/FLAG567e05592 [2019-12-26 20:45:27,909 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:45:27,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2019-12-26 20:45:27,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cd206a8/8b4e94ff789e44ecb6d61ed46b046e9e/FLAG567e05592 [2019-12-26 20:45:28,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cd206a8/8b4e94ff789e44ecb6d61ed46b046e9e [2019-12-26 20:45:28,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:45:28,188 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:45:28,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:28,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:45:28,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:45:28,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbc5a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28, skipping insertion in model container [2019-12-26 20:45:28,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:45:28,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:45:28,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:29,015 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:45:29,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:29,253 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:45:29,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29 WrapperNode [2019-12-26 20:45:29,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:29,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:29,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:45:29,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:45:29,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:29,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:45:29,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:45:29,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:45:29,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (1/1) ... [2019-12-26 20:45:29,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:45:29,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:45:29,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:45:29,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:45:29,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (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 [2019-12-26 20:45:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:45:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:45:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-26 20:45:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2019-12-26 20:45:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2019-12-26 20:45:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:45:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-26 20:45:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:45:29,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:45:29,418 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:45:29,894 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:45:29,895 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-12-26 20:45:29,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:29 BoogieIcfgContainer [2019-12-26 20:45:29,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:45:29,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:45:29,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:45:29,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:45:29,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:45:28" (1/3) ... [2019-12-26 20:45:29,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102dd950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:29, skipping insertion in model container [2019-12-26 20:45:29,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:29" (2/3) ... [2019-12-26 20:45:29,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102dd950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:29, skipping insertion in model container [2019-12-26 20:45:29,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:29" (3/3) ... [2019-12-26 20:45:29,907 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2019-12-26 20:45:29,917 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:45:29,918 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:45:29,926 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:45:29,927 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:45:29,970 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,971 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,971 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,971 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,972 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,972 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,972 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,972 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,973 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,973 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,973 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,973 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,974 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,974 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,975 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,975 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,975 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,976 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,976 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,976 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,977 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,977 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,977 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,978 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,978 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,979 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,979 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,979 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,979 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,980 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,980 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,980 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,980 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,981 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,982 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,982 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,982 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,983 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,984 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,984 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,986 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,986 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,987 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,987 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,987 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,987 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,988 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,988 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,989 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,989 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,989 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,989 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,990 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,990 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,990 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,990 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,990 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,991 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,991 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,992 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,992 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,992 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,992 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,993 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,993 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,993 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,993 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,995 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,995 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,995 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,996 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,996 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,996 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,997 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,997 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,998 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,998 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,998 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,999 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,999 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,999 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:29,999 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,000 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,000 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,001 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,006 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,006 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,010 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,011 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,011 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,012 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,012 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,012 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,012 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,013 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,013 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,014 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,014 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,014 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,014 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,014 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,015 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,015 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,015 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,015 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,031 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,036 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,037 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,037 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,038 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,044 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,044 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:30,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:45:30,080 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:45:30,080 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:45:30,081 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:45:30,081 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:45:30,081 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:45:30,081 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:45:30,081 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:45:30,081 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:45:30,095 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions [2019-12-26 20:45:30,097 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-26 20:45:30,179 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-26 20:45:30,179 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-26 20:45:30,189 INFO L76 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2019-12-26 20:45:30,199 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-26 20:45:30,252 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-26 20:45:30,252 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-26 20:45:30,255 INFO L76 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2019-12-26 20:45:30,259 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2019-12-26 20:45:30,260 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:45:32,459 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-12-26 20:45:32,677 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2019-12-26 20:45:32,677 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2019-12-26 20:45:32,682 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 25 transitions [2019-12-26 20:45:32,694 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2019-12-26 20:45:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-12-26 20:45:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:32,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,705 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,705 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2019-12-26 20:45:32,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380230301] [2019-12-26 20:45:32,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380230301] [2019-12-26 20:45:32,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:32,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:32,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245842483] [2019-12-26 20:45:32,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:45:32,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:45:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:32,936 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2019-12-26 20:45:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,017 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2019-12-26 20:45:33,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:45:33,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-26 20:45:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,035 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:45:33,035 INFO L226 Difference]: Without dead ends: 53 [2019-12-26 20:45:33,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-26 20:45:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-26 20:45:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-26 20:45:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-26 20:45:33,091 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2019-12-26 20:45:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,092 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-26 20:45:33,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:45:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-26 20:45:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:33,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,094 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,094 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,095 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2019-12-26 20:45:33,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887568904] [2019-12-26 20:45:33,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887568904] [2019-12-26 20:45:33,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009779908] [2019-12-26 20:45:33,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-26 20:45:33,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764296881] [2019-12-26 20:45:33,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:33,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:33,284 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 5 states. [2019-12-26 20:45:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,322 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2019-12-26 20:45:33,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:33,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-26 20:45:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,324 INFO L225 Difference]: With dead ends: 42 [2019-12-26 20:45:33,324 INFO L226 Difference]: Without dead ends: 42 [2019-12-26 20:45:33,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-26 20:45:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-26 20:45:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-26 20:45:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2019-12-26 20:45:33,331 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2019-12-26 20:45:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,331 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2019-12-26 20:45:33,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2019-12-26 20:45:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:33,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,332 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,537 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2019-12-26 20:45:33,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933145490] [2019-12-26 20:45:33,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933145490] [2019-12-26 20:45:33,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207533315] [2019-12-26 20:45:33,655 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 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 [2019-12-26 20:45:33,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-26 20:45:33,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,804 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-26 20:45:33,807 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-26 20:45:33,814 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-26 20:45:33,816 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-26 20:45:33,816 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-26 20:45:33,856 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-26 20:45:33,857 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-12-26 20:45:33,858 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-26 20:45:33,875 INFO L614 ElimStorePlain]: treesize reduction 16, result has 52.9 percent of original size [2019-12-26 20:45:33,897 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-26 20:45:33,898 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-12-26 20:45:33,939 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-26 20:45:33,939 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-26 20:45:33,943 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-26 20:45:33,944 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-26 20:45:33,944 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-26 20:45:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:33,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:45:33,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2019-12-26 20:45:33,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36277659] [2019-12-26 20:45:33,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:33,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:45:33,958 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2019-12-26 20:45:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,217 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-26 20:45:34,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:34,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-26 20:45:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,221 INFO L225 Difference]: With dead ends: 65 [2019-12-26 20:45:34,221 INFO L226 Difference]: Without dead ends: 65 [2019-12-26 20:45:34,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-26 20:45:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2019-12-26 20:45:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:45:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-26 20:45:34,229 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2019-12-26 20:45:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,230 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-26 20:45:34,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-26 20:45:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,231 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,434 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2019-12-26 20:45:34,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825166215] [2019-12-26 20:45:34,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-26 20:45:34,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825166215] [2019-12-26 20:45:34,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420695375] [2019-12-26 20:45:34,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-26 20:45:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-26 20:45:34,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-26 20:45:34,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085513801] [2019-12-26 20:45:34,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-26 20:45:34,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-26 20:45:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:45:34,573 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 6 states. [2019-12-26 20:45:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,597 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2019-12-26 20:45:34,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:34,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-26 20:45:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,598 INFO L225 Difference]: With dead ends: 53 [2019-12-26 20:45:34,598 INFO L226 Difference]: Without dead ends: 53 [2019-12-26 20:45:34,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:45:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-26 20:45:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-26 20:45:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-26 20:45:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2019-12-26 20:45:34,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2019-12-26 20:45:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,605 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2019-12-26 20:45:34,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-26 20:45:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2019-12-26 20:45:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:34,606 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,606 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,814 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2019-12-26 20:45:34,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377039291] [2019-12-26 20:45:34,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-26 20:45:34,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377039291] [2019-12-26 20:45:34,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542128583] [2019-12-26 20:45:34,905 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 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 [2019-12-26 20:45:34,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:34,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-26 20:45:34,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-26 20:45:34,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309619159] [2019-12-26 20:45:34,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-26 20:45:34,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-26 20:45:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:45:34,967 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2019-12-26 20:45:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,012 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2019-12-26 20:45:35,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:35,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-26 20:45:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,013 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:35,014 INFO L226 Difference]: Without dead ends: 54 [2019-12-26 20:45:35,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:45:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-26 20:45:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-26 20:45:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-26 20:45:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2019-12-26 20:45:35,027 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2019-12-26 20:45:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,027 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2019-12-26 20:45:35,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-26 20:45:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2019-12-26 20:45:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:35,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,028 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,245 INFO L410 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2019-12-26 20:45:35,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25138332] [2019-12-26 20:45:35,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-26 20:45:35,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25138332] [2019-12-26 20:45:35,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758945118] [2019-12-26 20:45:35,327 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 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 [2019-12-26 20:45:35,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:35,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,454 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-26 20:45:35,454 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-26 20:45:35,463 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-26 20:45:35,464 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-26 20:45:35,464 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-12-26 20:45:35,484 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-26 20:45:35,484 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-26 20:45:35,487 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-26 20:45:35,488 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-26 20:45:35,488 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-26 20:45:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-26 20:45:35,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:45:35,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2019-12-26 20:45:35,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322342538] [2019-12-26 20:45:35,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:35,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:35,506 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2019-12-26 20:45:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,721 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-26 20:45:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:35,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-26 20:45:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,723 INFO L225 Difference]: With dead ends: 74 [2019-12-26 20:45:35,723 INFO L226 Difference]: Without dead ends: 74 [2019-12-26 20:45:35,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-26 20:45:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2019-12-26 20:45:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-26 20:45:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2019-12-26 20:45:35,730 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2019-12-26 20:45:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,730 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2019-12-26 20:45:35,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2019-12-26 20:45:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:35,731 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,732 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,935 INFO L410 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2019-12-26 20:45:35,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287629594] [2019-12-26 20:45:35,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287629594] [2019-12-26 20:45:36,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149090216] [2019-12-26 20:45:36,023 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-12-26 20:45:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-26 20:45:36,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849152296] [2019-12-26 20:45:36,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:36,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:36,098 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 8 states. [2019-12-26 20:45:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,120 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-12-26 20:45:36,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:36,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-26 20:45:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,123 INFO L225 Difference]: With dead ends: 50 [2019-12-26 20:45:36,123 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:45:36,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:45:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-26 20:45:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:45:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2019-12-26 20:45:36,132 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2019-12-26 20:45:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,133 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2019-12-26 20:45:36,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2019-12-26 20:45:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:45:36,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,136 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,337 INFO L410 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2019-12-26 20:45:36,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40492109] [2019-12-26 20:45:36,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40492109] [2019-12-26 20:45:36,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265150703] [2019-12-26 20:45:36,400 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 [2019-12-26 20:45:36,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:36,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:36,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-26 20:45:36,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888781793] [2019-12-26 20:45:36,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:45:36,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:45:36,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:45:36,464 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 9 states. [2019-12-26 20:45:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,497 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2019-12-26 20:45:36,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:36,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-26 20:45:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,498 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:45:36,498 INFO L226 Difference]: Without dead ends: 51 [2019-12-26 20:45:36,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:45:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-26 20:45:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-26 20:45:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-26 20:45:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2019-12-26 20:45:36,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2019-12-26 20:45:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,504 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2019-12-26 20:45:36,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:45:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2019-12-26 20:45:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:45:36,505 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,506 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,710 INFO L410 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2019-12-26 20:45:36,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070462979] [2019-12-26 20:45:36,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070462979] [2019-12-26 20:45:36,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168126967] [2019-12-26 20:45:36,794 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 [2019-12-26 20:45:36,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:45:36,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:36,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:36,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-26 20:45:36,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17866242] [2019-12-26 20:45:36,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:36,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:36,885 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 10 states. [2019-12-26 20:45:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,905 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2019-12-26 20:45:36,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:36,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-26 20:45:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,906 INFO L225 Difference]: With dead ends: 52 [2019-12-26 20:45:36,906 INFO L226 Difference]: Without dead ends: 52 [2019-12-26 20:45:36,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-26 20:45:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-26 20:45:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:45:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2019-12-26 20:45:36,910 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2019-12-26 20:45:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,911 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2019-12-26 20:45:36,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2019-12-26 20:45:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-26 20:45:36,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,912 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,116 INFO L410 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2019-12-26 20:45:37,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688052404] [2019-12-26 20:45:37,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:37,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688052404] [2019-12-26 20:45:37,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803240998] [2019-12-26 20:45:37,211 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 [2019-12-26 20:45:37,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:37,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:37,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-26 20:45:37,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749748731] [2019-12-26 20:45:37,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-26 20:45:37,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-26 20:45:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:45:37,288 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 11 states. [2019-12-26 20:45:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,311 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2019-12-26 20:45:37,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:37,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-26 20:45:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,314 INFO L225 Difference]: With dead ends: 53 [2019-12-26 20:45:37,314 INFO L226 Difference]: Without dead ends: 53 [2019-12-26 20:45:37,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:45:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-26 20:45:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-26 20:45:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-26 20:45:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2019-12-26 20:45:37,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2019-12-26 20:45:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,323 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2019-12-26 20:45:37,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-26 20:45:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2019-12-26 20:45:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-26 20:45:37,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,327 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,533 INFO L410 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2019-12-26 20:45:37,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885454368] [2019-12-26 20:45:37,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:37,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885454368] [2019-12-26 20:45:37,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923304212] [2019-12-26 20:45:37,613 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 [2019-12-26 20:45:37,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-26 20:45:37,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:37,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-26 20:45:37,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209313536] [2019-12-26 20:45:37,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,708 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 12 states. [2019-12-26 20:45:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,740 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2019-12-26 20:45:37,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:37,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-26 20:45:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,741 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:37,741 INFO L226 Difference]: Without dead ends: 54 [2019-12-26 20:45:37,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-26 20:45:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-26 20:45:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-26 20:45:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2019-12-26 20:45:37,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2019-12-26 20:45:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,747 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2019-12-26 20:45:37,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2019-12-26 20:45:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-26 20:45:37,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,748 INFO L411 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,953 INFO L410 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2019-12-26 20:45:37,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520829171] [2019-12-26 20:45:37,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:38,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520829171] [2019-12-26 20:45:38,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65982727] [2019-12-26 20:45:38,082 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 [2019-12-26 20:45:38,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-26 20:45:38,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:38,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-26 20:45:38,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510664581] [2019-12-26 20:45:38,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:45:38,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:45:38,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:38,182 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 13 states. [2019-12-26 20:45:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,216 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2019-12-26 20:45:38,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:38,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-26 20:45:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,218 INFO L225 Difference]: With dead ends: 55 [2019-12-26 20:45:38,218 INFO L226 Difference]: Without dead ends: 55 [2019-12-26 20:45:38,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-26 20:45:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-12-26 20:45:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:45:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2019-12-26 20:45:38,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2019-12-26 20:45:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,222 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2019-12-26 20:45:38,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:45:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2019-12-26 20:45:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-26 20:45:38,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,223 INFO L411 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,428 INFO L410 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2019-12-26 20:45:38,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000440033] [2019-12-26 20:45:38,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:38,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000440033] [2019-12-26 20:45:38,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174812346] [2019-12-26 20:45:38,544 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 [2019-12-26 20:45:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:38,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-26 20:45:38,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630702232] [2019-12-26 20:45:38,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:38,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:38,612 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 14 states. [2019-12-26 20:45:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,640 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2019-12-26 20:45:38,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:38,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-26 20:45:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,641 INFO L225 Difference]: With dead ends: 56 [2019-12-26 20:45:38,642 INFO L226 Difference]: Without dead ends: 56 [2019-12-26 20:45:38,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-26 20:45:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-26 20:45:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-26 20:45:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2019-12-26 20:45:38,645 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2019-12-26 20:45:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,646 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2019-12-26 20:45:38,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2019-12-26 20:45:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-26 20:45:38,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,647 INFO L411 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,850 INFO L410 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2019-12-26 20:45:38,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666578556] [2019-12-26 20:45:38,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:38,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666578556] [2019-12-26 20:45:38,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445565614] [2019-12-26 20:45:38,991 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 [2019-12-26 20:45:39,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:39,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:39,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-26 20:45:39,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194522229] [2019-12-26 20:45:39,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-26 20:45:39,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-26 20:45:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:45:39,098 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 15 states. [2019-12-26 20:45:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,134 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2019-12-26 20:45:39,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:39,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-26 20:45:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,137 INFO L225 Difference]: With dead ends: 57 [2019-12-26 20:45:39,137 INFO L226 Difference]: Without dead ends: 57 [2019-12-26 20:45:39,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:45:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-26 20:45:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-26 20:45:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-26 20:45:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2019-12-26 20:45:39,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2019-12-26 20:45:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,142 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2019-12-26 20:45:39,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-26 20:45:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2019-12-26 20:45:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-26 20:45:39,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,144 INFO L411 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,352 INFO L410 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2019-12-26 20:45:39,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219591046] [2019-12-26 20:45:39,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:39,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219591046] [2019-12-26 20:45:39,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761150688] [2019-12-26 20:45:39,507 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 [2019-12-26 20:45:39,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-26 20:45:39,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:39,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-26 20:45:39,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495775277] [2019-12-26 20:45:39,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:39,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:39,638 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 16 states. [2019-12-26 20:45:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,669 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2019-12-26 20:45:39,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:39,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-12-26 20:45:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,670 INFO L225 Difference]: With dead ends: 58 [2019-12-26 20:45:39,670 INFO L226 Difference]: Without dead ends: 58 [2019-12-26 20:45:39,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-26 20:45:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-26 20:45:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:45:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2019-12-26 20:45:39,674 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2019-12-26 20:45:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,675 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2019-12-26 20:45:39,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2019-12-26 20:45:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-26 20:45:39,676 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,676 INFO L411 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,886 INFO L410 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2019-12-26 20:45:39,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360940148] [2019-12-26 20:45:39,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:40,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360940148] [2019-12-26 20:45:40,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140407414] [2019-12-26 20:45:40,046 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 [2019-12-26 20:45:40,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:40,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:40,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:40,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:40,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-26 20:45:40,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63741716] [2019-12-26 20:45:40,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-26 20:45:40,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-26 20:45:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:40,123 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 17 states. [2019-12-26 20:45:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,155 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2019-12-26 20:45:40,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:40,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-12-26 20:45:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,156 INFO L225 Difference]: With dead ends: 59 [2019-12-26 20:45:40,156 INFO L226 Difference]: Without dead ends: 59 [2019-12-26 20:45:40,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-26 20:45:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-26 20:45:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-26 20:45:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2019-12-26 20:45:40,163 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2019-12-26 20:45:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,164 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2019-12-26 20:45:40,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-26 20:45:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2019-12-26 20:45:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-26 20:45:40,164 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,165 INFO L411 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,365 INFO L410 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2019-12-26 20:45:40,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286017188] [2019-12-26 20:45:40,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:40,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286017188] [2019-12-26 20:45:40,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683164762] [2019-12-26 20:45:40,544 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 [2019-12-26 20:45:40,673 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-26 20:45:40,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:40,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:40,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:40,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-26 20:45:40,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176015979] [2019-12-26 20:45:40,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:45:40,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:45:40,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:40,698 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 18 states. [2019-12-26 20:45:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,728 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2019-12-26 20:45:40,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:40,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2019-12-26 20:45:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,729 INFO L225 Difference]: With dead ends: 60 [2019-12-26 20:45:40,730 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:45:40,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:45:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-26 20:45:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:45:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2019-12-26 20:45:40,733 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2019-12-26 20:45:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,733 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2019-12-26 20:45:40,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:45:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2019-12-26 20:45:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-26 20:45:40,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,734 INFO L411 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,938 INFO L410 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2019-12-26 20:45:40,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670847578] [2019-12-26 20:45:40,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:41,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670847578] [2019-12-26 20:45:41,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767604685] [2019-12-26 20:45:41,124 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 [2019-12-26 20:45:41,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-26 20:45:41,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:41,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:45:41,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:41,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:41,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-26 20:45:41,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351763326] [2019-12-26 20:45:41,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-26 20:45:41,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-26 20:45:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:41,455 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 19 states. [2019-12-26 20:45:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:41,512 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2019-12-26 20:45:41,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:45:41,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2019-12-26 20:45:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:41,513 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:45:41,514 INFO L226 Difference]: Without dead ends: 61 [2019-12-26 20:45:41,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-26 20:45:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-26 20:45:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-26 20:45:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2019-12-26 20:45:41,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2019-12-26 20:45:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:41,518 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2019-12-26 20:45:41,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-26 20:45:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2019-12-26 20:45:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-26 20:45:41,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:41,519 INFO L411 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:41,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:41,723 INFO L410 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2019-12-26 20:45:41,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:41,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808832293] [2019-12-26 20:45:41,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:41,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808832293] [2019-12-26 20:45:41,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464742029] [2019-12-26 20:45:41,934 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 [2019-12-26 20:45:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:41,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-26 20:45:41,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:42,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-26 20:45:42,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006811275] [2019-12-26 20:45:42,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:45:42,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:45:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:42,012 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 20 states. [2019-12-26 20:45:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:42,055 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2019-12-26 20:45:42,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:45:42,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-12-26 20:45:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:42,056 INFO L225 Difference]: With dead ends: 62 [2019-12-26 20:45:42,056 INFO L226 Difference]: Without dead ends: 62 [2019-12-26 20:45:42,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-26 20:45:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-26 20:45:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-26 20:45:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2019-12-26 20:45:42,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2019-12-26 20:45:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:42,060 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2019-12-26 20:45:42,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:45:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2019-12-26 20:45:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-26 20:45:42,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:42,060 INFO L411 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,261 INFO L410 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:42,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,262 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2019-12-26 20:45:42,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579531871] [2019-12-26 20:45:42,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:42,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579531871] [2019-12-26 20:45:42,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057116633] [2019-12-26 20:45:42,455 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 [2019-12-26 20:45:42,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:42,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:42,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:42,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-26 20:45:42,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813331791] [2019-12-26 20:45:42,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-26 20:45:42,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-26 20:45:42,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:42,524 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 21 states. [2019-12-26 20:45:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:42,555 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2019-12-26 20:45:42,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:45:42,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2019-12-26 20:45:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:42,562 INFO L225 Difference]: With dead ends: 63 [2019-12-26 20:45:42,562 INFO L226 Difference]: Without dead ends: 63 [2019-12-26 20:45:42,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-26 20:45:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-26 20:45:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-26 20:45:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2019-12-26 20:45:42,565 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2019-12-26 20:45:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:42,565 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2019-12-26 20:45:42,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-26 20:45:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2019-12-26 20:45:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-26 20:45:42,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:42,567 INFO L411 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,768 INFO L410 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2019-12-26 20:45:42,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094725719] [2019-12-26 20:45:42,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:42,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094725719] [2019-12-26 20:45:42,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124982858] [2019-12-26 20:45:42,977 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 [2019-12-26 20:45:43,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-26 20:45:43,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:43,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-26 20:45:43,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:43,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:43,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-26 20:45:43,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487994981] [2019-12-26 20:45:43,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:45:43,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:45:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:43,702 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 22 states. [2019-12-26 20:45:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,753 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2019-12-26 20:45:43,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:45:43,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-12-26 20:45:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,755 INFO L225 Difference]: With dead ends: 64 [2019-12-26 20:45:43,755 INFO L226 Difference]: Without dead ends: 64 [2019-12-26 20:45:43,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-26 20:45:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-26 20:45:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-26 20:45:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2019-12-26 20:45:43,760 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2019-12-26 20:45:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,760 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2019-12-26 20:45:43,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:45:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2019-12-26 20:45:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-26 20:45:43,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,761 INFO L411 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:43,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:43,969 INFO L410 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2019-12-26 20:45:43,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:43,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529426247] [2019-12-26 20:45:43,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:44,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529426247] [2019-12-26 20:45:44,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160577959] [2019-12-26 20:45:44,224 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 [2019-12-26 20:45:44,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:44,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:44,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:44,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-26 20:45:44,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023812370] [2019-12-26 20:45:44,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:45:44,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:45:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:44,301 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 23 states. [2019-12-26 20:45:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:44,354 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2019-12-26 20:45:44,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:45:44,355 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2019-12-26 20:45:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:44,355 INFO L225 Difference]: With dead ends: 65 [2019-12-26 20:45:44,356 INFO L226 Difference]: Without dead ends: 65 [2019-12-26 20:45:44,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-26 20:45:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-26 20:45:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-26 20:45:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2019-12-26 20:45:44,362 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2019-12-26 20:45:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:44,362 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2019-12-26 20:45:44,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:45:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2019-12-26 20:45:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-26 20:45:44,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:44,363 INFO L411 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,566 INFO L410 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2019-12-26 20:45:44,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890994779] [2019-12-26 20:45:44,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:44,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890994779] [2019-12-26 20:45:44,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944778501] [2019-12-26 20:45:44,822 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 [2019-12-26 20:45:44,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-26 20:45:44,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:45,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-26 20:45:45,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352580928] [2019-12-26 20:45:45,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-26 20:45:45,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-26 20:45:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:45,009 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 24 states. [2019-12-26 20:45:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:45,050 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2019-12-26 20:45:45,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:45:45,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-12-26 20:45:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:45,052 INFO L225 Difference]: With dead ends: 66 [2019-12-26 20:45:45,052 INFO L226 Difference]: Without dead ends: 66 [2019-12-26 20:45:45,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-26 20:45:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-26 20:45:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-26 20:45:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2019-12-26 20:45:45,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2019-12-26 20:45:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:45,056 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2019-12-26 20:45:45,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-26 20:45:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2019-12-26 20:45:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-26 20:45:45,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:45,057 INFO L411 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:45,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:45,261 INFO L410 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:45,262 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2019-12-26 20:45:45,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:45,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032619279] [2019-12-26 20:45:45,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:45,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032619279] [2019-12-26 20:45:45,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349449229] [2019-12-26 20:45:45,641 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 [2019-12-26 20:45:46,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-26 20:45:46,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:46,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:46,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-26 20:45:46,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442089746] [2019-12-26 20:45:46,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-26 20:45:46,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-26 20:45:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:46,030 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 25 states. [2019-12-26 20:45:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,067 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2019-12-26 20:45:46,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:45:46,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2019-12-26 20:45:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,068 INFO L225 Difference]: With dead ends: 67 [2019-12-26 20:45:46,069 INFO L226 Difference]: Without dead ends: 67 [2019-12-26 20:45:46,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-26 20:45:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-12-26 20:45:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-26 20:45:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2019-12-26 20:45:46,071 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2019-12-26 20:45:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,072 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2019-12-26 20:45:46,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-26 20:45:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2019-12-26 20:45:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-26 20:45:46,072 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,073 INFO L411 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,277 INFO L410 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2019-12-26 20:45:46,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295580927] [2019-12-26 20:45:46,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:46,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295580927] [2019-12-26 20:45:46,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342409691] [2019-12-26 20:45:46,677 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 [2019-12-26 20:45:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:46,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-26 20:45:46,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504518931] [2019-12-26 20:45:46,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-26 20:45:46,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-26 20:45:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:45:46,776 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 26 states. [2019-12-26 20:45:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,811 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2019-12-26 20:45:46,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:45:46,811 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2019-12-26 20:45:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,812 INFO L225 Difference]: With dead ends: 68 [2019-12-26 20:45:46,812 INFO L226 Difference]: Without dead ends: 68 [2019-12-26 20:45:46,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:45:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-26 20:45:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-26 20:45:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-26 20:45:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2019-12-26 20:45:46,815 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2019-12-26 20:45:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,815 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2019-12-26 20:45:46,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-26 20:45:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2019-12-26 20:45:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-26 20:45:46,817 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,817 INFO L411 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,021 INFO L410 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2019-12-26 20:45:47,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297292766] [2019-12-26 20:45:47,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:47,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297292766] [2019-12-26 20:45:47,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940383033] [2019-12-26 20:45:47,340 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 [2019-12-26 20:45:47,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:47,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:47,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-26 20:45:47,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238913271] [2019-12-26 20:45:47,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-26 20:45:47,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-26 20:45:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:45:47,410 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 27 states. [2019-12-26 20:45:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,446 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2019-12-26 20:45:47,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:45:47,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2019-12-26 20:45:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,447 INFO L225 Difference]: With dead ends: 69 [2019-12-26 20:45:47,447 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:45:47,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:45:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:45:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-26 20:45:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-26 20:45:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2019-12-26 20:45:47,450 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2019-12-26 20:45:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,450 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2019-12-26 20:45:47,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-26 20:45:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2019-12-26 20:45:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-26 20:45:47,451 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,451 INFO L411 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,654 INFO L410 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2019-12-26 20:45:47,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866705098] [2019-12-26 20:45:47,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:47,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866705098] [2019-12-26 20:45:47,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384089854] [2019-12-26 20:45:47,988 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 [2019-12-26 20:45:49,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-12-26 20:45:49,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:49,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-26 20:45:49,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171437846] [2019-12-26 20:45:49,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-26 20:45:49,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-26 20:45:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:45:49,864 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 28 states. [2019-12-26 20:45:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,902 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2019-12-26 20:45:49,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:45:49,902 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-12-26 20:45:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,902 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:45:49,903 INFO L226 Difference]: Without dead ends: 70 [2019-12-26 20:45:49,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:45:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-26 20:45:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-26 20:45:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:45:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2019-12-26 20:45:49,906 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2019-12-26 20:45:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,906 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2019-12-26 20:45:49,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-26 20:45:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2019-12-26 20:45:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-26 20:45:49,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,907 INFO L411 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,108 INFO L410 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2019-12-26 20:45:50,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735853361] [2019-12-26 20:45:50,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:50,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735853361] [2019-12-26 20:45:50,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650028127] [2019-12-26 20:45:50,447 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 [2019-12-26 20:45:50,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:50,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:50,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:50,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-26 20:45:50,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649564032] [2019-12-26 20:45:50,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-26 20:45:50,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-26 20:45:50,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:45:50,526 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 29 states. [2019-12-26 20:45:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:50,580 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2019-12-26 20:45:50,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:45:50,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2019-12-26 20:45:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:50,581 INFO L225 Difference]: With dead ends: 71 [2019-12-26 20:45:50,581 INFO L226 Difference]: Without dead ends: 71 [2019-12-26 20:45:50,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:45:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-26 20:45:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-26 20:45:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-26 20:45:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2019-12-26 20:45:50,584 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2019-12-26 20:45:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:50,584 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2019-12-26 20:45:50,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-26 20:45:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2019-12-26 20:45:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-26 20:45:50,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:50,585 INFO L411 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,788 INFO L410 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2019-12-26 20:45:50,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288864697] [2019-12-26 20:45:50,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:51,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288864697] [2019-12-26 20:45:51,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315191202] [2019-12-26 20:45:51,196 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 [2019-12-26 20:45:51,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-26 20:45:51,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:51,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-26 20:45:51,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:51,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:51,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-26 20:45:51,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243993182] [2019-12-26 20:45:51,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-26 20:45:51,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:51,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-26 20:45:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:45:51,466 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 30 states. [2019-12-26 20:45:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,522 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2019-12-26 20:45:51,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-26 20:45:51,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2019-12-26 20:45:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,524 INFO L225 Difference]: With dead ends: 72 [2019-12-26 20:45:51,524 INFO L226 Difference]: Without dead ends: 72 [2019-12-26 20:45:51,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:45:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-26 20:45:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-26 20:45:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2019-12-26 20:45:51,527 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2019-12-26 20:45:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,528 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2019-12-26 20:45:51,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-26 20:45:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2019-12-26 20:45:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-26 20:45:51,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,528 INFO L411 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:51,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,729 INFO L410 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2019-12-26 20:45:51,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:51,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393550406] [2019-12-26 20:45:51,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:52,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393550406] [2019-12-26 20:45:52,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066754283] [2019-12-26 20:45:52,229 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 [2019-12-26 20:45:54,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-12-26 20:45:54,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:54,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-26 20:45:54,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:54,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:54,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-26 20:45:54,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869999857] [2019-12-26 20:45:54,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-26 20:45:54,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-26 20:45:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:45:54,966 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 31 states. [2019-12-26 20:45:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,015 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2019-12-26 20:45:55,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-26 20:45:55,016 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2019-12-26 20:45:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,016 INFO L225 Difference]: With dead ends: 73 [2019-12-26 20:45:55,016 INFO L226 Difference]: Without dead ends: 73 [2019-12-26 20:45:55,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:45:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-26 20:45:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-12-26 20:45:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-12-26 20:45:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2019-12-26 20:45:55,021 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2019-12-26 20:45:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,021 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2019-12-26 20:45:55,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-26 20:45:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2019-12-26 20:45:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-26 20:45:55,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,022 INFO L411 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,223 INFO L410 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2019-12-26 20:45:55,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857704821] [2019-12-26 20:45:55,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:55,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857704821] [2019-12-26 20:45:55,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139881055] [2019-12-26 20:45:55,639 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 [2019-12-26 20:45:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-26 20:45:55,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:55,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-26 20:45:55,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678957292] [2019-12-26 20:45:55,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-26 20:45:55,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-26 20:45:55,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:45:55,714 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 32 states. [2019-12-26 20:45:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,758 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2019-12-26 20:45:55,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-26 20:45:55,759 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2019-12-26 20:45:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,760 INFO L225 Difference]: With dead ends: 74 [2019-12-26 20:45:55,760 INFO L226 Difference]: Without dead ends: 74 [2019-12-26 20:45:55,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:45:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-26 20:45:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-26 20:45:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-26 20:45:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2019-12-26 20:45:55,763 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2019-12-26 20:45:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,763 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2019-12-26 20:45:55,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-26 20:45:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2019-12-26 20:45:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-26 20:45:55,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,764 INFO L411 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,967 INFO L410 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2019-12-26 20:45:55,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818652585] [2019-12-26 20:45:55,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:56,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818652585] [2019-12-26 20:45:56,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430598911] [2019-12-26 20:45:56,399 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 [2019-12-26 20:45:56,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:56,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:56,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-26 20:45:56,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:56,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:56,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-26 20:45:56,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201166568] [2019-12-26 20:45:56,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-26 20:45:56,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-26 20:45:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:45:56,485 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 33 states. [2019-12-26 20:45:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:56,549 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2019-12-26 20:45:56,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-26 20:45:56,550 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2019-12-26 20:45:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:56,551 INFO L225 Difference]: With dead ends: 75 [2019-12-26 20:45:56,551 INFO L226 Difference]: Without dead ends: 75 [2019-12-26 20:45:56,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:45:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-26 20:45:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-12-26 20:45:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-26 20:45:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2019-12-26 20:45:56,553 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2019-12-26 20:45:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:56,553 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2019-12-26 20:45:56,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-26 20:45:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2019-12-26 20:45:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-26 20:45:56,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:56,554 INFO L411 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:45:56,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:56,755 INFO L410 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:45:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2019-12-26 20:45:56,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:56,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148074759] [2019-12-26 20:45:56,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:45:57,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148074759] [2019-12-26 20:45:57,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016615697] [2019-12-26 20:45:57,514 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 [2019-12-26 20:46:01,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-26 20:46:01,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:01,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-26 20:46:01,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:01,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:01,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-26 20:46:01,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374373024] [2019-12-26 20:46:01,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-26 20:46:01,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:01,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-26 20:46:01,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:46:01,602 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 34 states. [2019-12-26 20:46:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:01,648 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-12-26 20:46:01,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-26 20:46:01,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2019-12-26 20:46:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:01,649 INFO L225 Difference]: With dead ends: 76 [2019-12-26 20:46:01,649 INFO L226 Difference]: Without dead ends: 76 [2019-12-26 20:46:01,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:46:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-26 20:46:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-26 20:46:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:46:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2019-12-26 20:46:01,653 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2019-12-26 20:46:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:01,653 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2019-12-26 20:46:01,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-26 20:46:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2019-12-26 20:46:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-26 20:46:01,654 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:01,654 INFO L411 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:01,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:01,860 INFO L410 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2019-12-26 20:46:01,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:01,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539391251] [2019-12-26 20:46:01,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:02,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539391251] [2019-12-26 20:46:02,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034526206] [2019-12-26 20:46:02,355 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 [2019-12-26 20:46:02,433 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:02,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:02,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-26 20:46:02,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289397956] [2019-12-26 20:46:02,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-26 20:46:02,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-26 20:46:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:46:02,454 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 35 states. [2019-12-26 20:46:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,497 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2019-12-26 20:46:02,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-26 20:46:02,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2019-12-26 20:46:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,498 INFO L225 Difference]: With dead ends: 77 [2019-12-26 20:46:02,498 INFO L226 Difference]: Without dead ends: 77 [2019-12-26 20:46:02,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:46:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-26 20:46:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-26 20:46:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-26 20:46:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2019-12-26 20:46:02,501 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2019-12-26 20:46:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,502 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2019-12-26 20:46:02,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-26 20:46:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2019-12-26 20:46:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-26 20:46:02,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,503 INFO L411 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,705 INFO L410 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2019-12-26 20:46:02,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579981826] [2019-12-26 20:46:02,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:03,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579981826] [2019-12-26 20:46:03,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601749044] [2019-12-26 20:46:03,211 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 [2019-12-26 20:46:03,892 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-26 20:46:03,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:03,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-26 20:46:03,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:03,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:03,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-26 20:46:03,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052516449] [2019-12-26 20:46:03,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-26 20:46:03,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-26 20:46:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:46:03,910 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 36 states. [2019-12-26 20:46:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:03,968 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2019-12-26 20:46:03,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-26 20:46:03,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2019-12-26 20:46:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:03,970 INFO L225 Difference]: With dead ends: 78 [2019-12-26 20:46:03,970 INFO L226 Difference]: Without dead ends: 78 [2019-12-26 20:46:03,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:46:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-26 20:46:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-26 20:46:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-26 20:46:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2019-12-26 20:46:03,973 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2019-12-26 20:46:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:03,974 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2019-12-26 20:46:03,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-26 20:46:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2019-12-26 20:46:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-26 20:46:03,974 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:03,974 INFO L411 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:04,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:04,180 INFO L410 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2019-12-26 20:46:04,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:04,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367857816] [2019-12-26 20:46:04,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:04,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367857816] [2019-12-26 20:46:04,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143789838] [2019-12-26 20:46:04,732 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 [2019-12-26 20:46:09,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-12-26 20:46:09,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:09,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-26 20:46:09,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:09,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-26 20:46:09,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510542212] [2019-12-26 20:46:09,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-26 20:46:09,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-26 20:46:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:46:09,228 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 37 states. [2019-12-26 20:46:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:09,301 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2019-12-26 20:46:09,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-26 20:46:09,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2019-12-26 20:46:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:09,302 INFO L225 Difference]: With dead ends: 79 [2019-12-26 20:46:09,302 INFO L226 Difference]: Without dead ends: 79 [2019-12-26 20:46:09,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:46:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-26 20:46:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-26 20:46:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-26 20:46:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2019-12-26 20:46:09,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2019-12-26 20:46:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:09,307 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2019-12-26 20:46:09,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-26 20:46:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2019-12-26 20:46:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-26 20:46:09,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:09,308 INFO L411 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:09,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:09,516 INFO L410 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2019-12-26 20:46:09,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:09,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050540755] [2019-12-26 20:46:09,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:10,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050540755] [2019-12-26 20:46:10,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529268298] [2019-12-26 20:46:10,090 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:10,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-26 20:46:10,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:10,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:10,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-26 20:46:10,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087951608] [2019-12-26 20:46:10,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-26 20:46:10,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-26 20:46:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:46:10,171 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 38 states. [2019-12-26 20:46:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:10,247 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2019-12-26 20:46:10,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-26 20:46:10,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-12-26 20:46:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:10,249 INFO L225 Difference]: With dead ends: 80 [2019-12-26 20:46:10,249 INFO L226 Difference]: Without dead ends: 80 [2019-12-26 20:46:10,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:46:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-26 20:46:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-26 20:46:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:46:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2019-12-26 20:46:10,252 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2019-12-26 20:46:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:10,252 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2019-12-26 20:46:10,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-26 20:46:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2019-12-26 20:46:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-26 20:46:10,253 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:10,253 INFO L411 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:10,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,456 INFO L410 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2019-12-26 20:46:10,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:10,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607082714] [2019-12-26 20:46:10,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:11,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607082714] [2019-12-26 20:46:11,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573027735] [2019-12-26 20:46:11,192 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:11,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:11,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-26 20:46:11,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:11,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:11,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-26 20:46:11,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70336454] [2019-12-26 20:46:11,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-26 20:46:11,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-26 20:46:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:46:11,279 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 39 states. [2019-12-26 20:46:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:11,332 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-12-26 20:46:11,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-26 20:46:11,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2019-12-26 20:46:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:11,333 INFO L225 Difference]: With dead ends: 81 [2019-12-26 20:46:11,333 INFO L226 Difference]: Without dead ends: 81 [2019-12-26 20:46:11,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:46:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-26 20:46:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-26 20:46:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-26 20:46:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2019-12-26 20:46:11,338 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2019-12-26 20:46:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:11,338 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2019-12-26 20:46:11,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-26 20:46:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2019-12-26 20:46:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-26 20:46:11,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:11,339 INFO L411 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:11,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,540 INFO L410 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:11,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2019-12-26 20:46:11,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:11,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295729373] [2019-12-26 20:46:11,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:12,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295729373] [2019-12-26 20:46:12,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325183249] [2019-12-26 20:46:12,139 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:20,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-12-26 20:46:20,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:20,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-26 20:46:20,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:20,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:20,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-26 20:46:20,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548214528] [2019-12-26 20:46:20,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-26 20:46:20,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-26 20:46:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:46:20,755 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 40 states. [2019-12-26 20:46:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:20,834 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2019-12-26 20:46:20,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-26 20:46:20,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2019-12-26 20:46:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:20,835 INFO L225 Difference]: With dead ends: 82 [2019-12-26 20:46:20,835 INFO L226 Difference]: Without dead ends: 82 [2019-12-26 20:46:20,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:46:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-26 20:46:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-26 20:46:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-26 20:46:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2019-12-26 20:46:20,839 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2019-12-26 20:46:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:20,839 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2019-12-26 20:46:20,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-26 20:46:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2019-12-26 20:46:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-26 20:46:20,848 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:20,849 INFO L411 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:21,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:21,056 INFO L410 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2019-12-26 20:46:21,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:21,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988959393] [2019-12-26 20:46:21,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:21,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988959393] [2019-12-26 20:46:21,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7862513] [2019-12-26 20:46:21,690 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:21,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:21,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:21,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-26 20:46:21,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:21,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-26 20:46:21,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424698120] [2019-12-26 20:46:21,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-26 20:46:21,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-26 20:46:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:46:21,778 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 41 states. [2019-12-26 20:46:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:21,837 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2019-12-26 20:46:21,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-26 20:46:21,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2019-12-26 20:46:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:21,838 INFO L225 Difference]: With dead ends: 83 [2019-12-26 20:46:21,838 INFO L226 Difference]: Without dead ends: 83 [2019-12-26 20:46:21,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:46:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-26 20:46:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-26 20:46:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:46:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2019-12-26 20:46:21,842 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2019-12-26 20:46:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:21,842 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2019-12-26 20:46:21,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-26 20:46:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2019-12-26 20:46:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-26 20:46:21,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:21,843 INFO L411 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:22,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:22,046 INFO L410 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2019-12-26 20:46:22,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:22,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697155906] [2019-12-26 20:46:22,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:22,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697155906] [2019-12-26 20:46:22,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271475965] [2019-12-26 20:46:22,694 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:25,919 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-26 20:46:25,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:25,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-26 20:46:25,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:25,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:25,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-26 20:46:25,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966374090] [2019-12-26 20:46:25,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-26 20:46:25,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-26 20:46:25,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:46:25,942 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 42 states. [2019-12-26 20:46:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:25,998 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2019-12-26 20:46:26,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-26 20:46:26,001 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2019-12-26 20:46:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:26,002 INFO L225 Difference]: With dead ends: 84 [2019-12-26 20:46:26,002 INFO L226 Difference]: Without dead ends: 84 [2019-12-26 20:46:26,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:46:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-26 20:46:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-26 20:46:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:46:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2019-12-26 20:46:26,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2019-12-26 20:46:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:26,005 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2019-12-26 20:46:26,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-26 20:46:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2019-12-26 20:46:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-26 20:46:26,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:26,006 INFO L411 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:46:26,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:26,214 INFO L410 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:46:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2019-12-26 20:46:26,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:26,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739658925] [2019-12-26 20:46:26,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:46:26,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739658925] [2019-12-26 20:46:26,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729646983] [2019-12-26 20:46:26,876 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:32,395 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-26 20:47:32,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:32,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-26 20:47:32,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:32,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:32,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-26 20:47:32,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208750131] [2019-12-26 20:47:32,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-26 20:47:32,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-26 20:47:32,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-26 20:47:32,444 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 43 states. [2019-12-26 20:47:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:32,497 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2019-12-26 20:47:32,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-26 20:47:32,497 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 48 [2019-12-26 20:47:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:32,498 INFO L225 Difference]: With dead ends: 85 [2019-12-26 20:47:32,498 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:47:32,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-26 20:47:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:47:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-12-26 20:47:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:47:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2019-12-26 20:47:32,502 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2019-12-26 20:47:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:32,502 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2019-12-26 20:47:32,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-26 20:47:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2019-12-26 20:47:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-26 20:47:32,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:32,504 INFO L411 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:32,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:32,715 INFO L410 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2019-12-26 20:47:32,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:32,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060389393] [2019-12-26 20:47:32,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:33,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060389393] [2019-12-26 20:47:33,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959649883] [2019-12-26 20:47:33,578 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:33,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-26 20:47:33,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:33,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:33,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-26 20:47:33,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813405322] [2019-12-26 20:47:33,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-26 20:47:33,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:33,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-26 20:47:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:47:33,671 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 44 states. [2019-12-26 20:47:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:33,734 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-12-26 20:47:33,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-26 20:47:33,734 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2019-12-26 20:47:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:33,735 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:47:33,735 INFO L226 Difference]: Without dead ends: 86 [2019-12-26 20:47:33,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:47:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-26 20:47:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-26 20:47:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:47:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2019-12-26 20:47:33,741 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2019-12-26 20:47:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:33,742 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2019-12-26 20:47:33,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-26 20:47:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2019-12-26 20:47:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-26 20:47:33,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:33,743 INFO L411 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:33,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:33,947 INFO L410 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2019-12-26 20:47:33,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:33,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251060989] [2019-12-26 20:47:33,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:34,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251060989] [2019-12-26 20:47:34,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973137218] [2019-12-26 20:47:34,697 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:34,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:34,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:34,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-26 20:47:34,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:34,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:34,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-26 20:47:34,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081919720] [2019-12-26 20:47:34,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-26 20:47:34,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:34,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-26 20:47:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-26 20:47:34,788 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 45 states. [2019-12-26 20:47:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:34,857 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2019-12-26 20:47:34,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-26 20:47:34,858 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2019-12-26 20:47:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:34,859 INFO L225 Difference]: With dead ends: 87 [2019-12-26 20:47:34,859 INFO L226 Difference]: Without dead ends: 87 [2019-12-26 20:47:34,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-26 20:47:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-26 20:47:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-12-26 20:47:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-26 20:47:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2019-12-26 20:47:34,864 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2019-12-26 20:47:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:34,864 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2019-12-26 20:47:34,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-26 20:47:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2019-12-26 20:47:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-26 20:47:34,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:34,865 INFO L411 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:35,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:35,068 INFO L410 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2019-12-26 20:47:35,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:35,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548107207] [2019-12-26 20:47:35,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:35,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548107207] [2019-12-26 20:47:35,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199808840] [2019-12-26 20:47:35,970 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:39,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-26 20:47:39,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:39,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-26 20:47:39,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:39,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:39,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-26 20:47:39,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919651612] [2019-12-26 20:47:39,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-26 20:47:39,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:39,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-26 20:47:39,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-26 20:47:39,103 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 46 states. [2019-12-26 20:47:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:39,183 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2019-12-26 20:47:39,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-26 20:47:39,184 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2019-12-26 20:47:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:39,184 INFO L225 Difference]: With dead ends: 88 [2019-12-26 20:47:39,185 INFO L226 Difference]: Without dead ends: 88 [2019-12-26 20:47:39,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-26 20:47:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-26 20:47:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-26 20:47:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:47:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2019-12-26 20:47:39,188 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2019-12-26 20:47:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:39,188 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2019-12-26 20:47:39,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-26 20:47:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2019-12-26 20:47:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-26 20:47:39,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:39,189 INFO L411 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:39,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:39,396 INFO L410 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2019-12-26 20:47:39,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:39,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270106752] [2019-12-26 20:47:39,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:40,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270106752] [2019-12-26 20:47:40,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579630906] [2019-12-26 20:47:40,220 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:40,286 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:40,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:40,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-26 20:47:40,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-12-26 20:47:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182787013] [2019-12-26 20:47:40,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-26 20:47:40,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-26 20:47:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-26 20:47:40,305 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 47 states. [2019-12-26 20:47:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:40,369 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2019-12-26 20:47:40,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-26 20:47:40,374 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 52 [2019-12-26 20:47:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:40,375 INFO L225 Difference]: With dead ends: 89 [2019-12-26 20:47:40,375 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:47:40,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-26 20:47:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:47:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-12-26 20:47:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-26 20:47:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2019-12-26 20:47:40,379 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2019-12-26 20:47:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:40,379 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-12-26 20:47:40,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-26 20:47:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2019-12-26 20:47:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-26 20:47:40,380 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:40,380 INFO L411 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:40,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:40,584 INFO L410 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2019-12-26 20:47:40,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:40,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880607533] [2019-12-26 20:47:40,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:41,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880607533] [2019-12-26 20:47:41,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127448179] [2019-12-26 20:47:41,669 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:48,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-12-26 20:47:48,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:48,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-26 20:47:48,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:48,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:48,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-12-26 20:47:48,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466227456] [2019-12-26 20:47:48,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-26 20:47:48,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-26 20:47:48,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-26 20:47:48,559 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 48 states. [2019-12-26 20:47:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:48,612 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2019-12-26 20:47:48,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-26 20:47:48,612 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2019-12-26 20:47:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:48,613 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:47:48,613 INFO L226 Difference]: Without dead ends: 90 [2019-12-26 20:47:48,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-26 20:47:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-26 20:47:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-26 20:47:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-26 20:47:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2019-12-26 20:47:48,615 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2019-12-26 20:47:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:48,615 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2019-12-26 20:47:48,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-26 20:47:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2019-12-26 20:47:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-26 20:47:48,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:48,616 INFO L411 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2019-12-26 20:47:48,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:48,816 INFO L410 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-26 20:47:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2019-12-26 20:47:48,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:48,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388204438] [2019-12-26 20:47:48,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-26 20:47:49,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388204438] [2019-12-26 20:47:49,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080954438] [2019-12-26 20:47:49,725 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown