/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:47:40,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:47:40,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:47:40,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:47:40,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:47:40,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:47:40,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:47:40,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:47:40,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:47:40,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:47:40,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:47:40,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:47:40,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:47:40,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:47:40,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:47:40,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:47:40,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:47:40,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:47:40,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:47:40,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:47:40,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:47:40,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:47:40,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:47:40,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:47:40,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:47:40,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:47:40,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:47:40,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:47:40,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:47:40,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:47:40,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:47:40,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:47:40,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:47:40,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:47:40,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:47:40,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:47:40,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:47:40,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:47:40,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:47:40,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:47:40,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:47:40,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:47:40,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:47:40,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:47:40,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:47:40,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:47:40,979 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:47:40,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:47:40,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:47:40,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:47:40,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:47:40,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:47:40,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:47:40,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:47:40,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:47:40,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:47:40,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:47:40,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:47:40,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:47:40,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:47:40,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:47:40,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:47:40,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:47:40,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:40,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:47:40,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:47:40,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:47:40,984 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:47:40,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:47:40,984 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:47:40,984 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:47:40,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:47:40,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:47:41,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:47:41,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:47:41,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:47:41,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:47:41,284 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:47:41,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-04-18 11:47:41,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe337a4e/07e0e07ec3ca43e4b6c769d0b8d7fd1d/FLAG6263f1017 [2020-04-18 11:47:41,924 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:47:41,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-04-18 11:47:41,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe337a4e/07e0e07ec3ca43e4b6c769d0b8d7fd1d/FLAG6263f1017 [2020-04-18 11:47:42,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe337a4e/07e0e07ec3ca43e4b6c769d0b8d7fd1d [2020-04-18 11:47:42,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:47:42,246 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:47:42,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:47:42,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:47:42,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afc5240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42, skipping insertion in model container [2020-04-18 11:47:42,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:47:42,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:47:42,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:43,001 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:47:43,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:43,268 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:47:43,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43 WrapperNode [2020-04-18 11:47:43,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:43,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:47:43,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:47:43,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:47:43,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:47:43,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:47:43,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:47:43,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:47:43,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (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 [2020-04-18 11:47:43,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:47:43,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:47:43,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 11:47:43,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-04-18 11:47:43,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-04-18 11:47:43,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:47:43,483 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 11:47:43,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:47:43,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:47:43,486 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:47:43,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:47:43,996 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-04-18 11:47:44,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:44 BoogieIcfgContainer [2020-04-18 11:47:44,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:47:44,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:47:44,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:47:44,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:47:44,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:47:42" (1/3) ... [2020-04-18 11:47:44,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d666582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:44, skipping insertion in model container [2020-04-18 11:47:44,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (2/3) ... [2020-04-18 11:47:44,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d666582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:44, skipping insertion in model container [2020-04-18 11:47:44,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:44" (3/3) ... [2020-04-18 11:47:44,008 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-04-18 11:47:44,017 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:47:44,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:47:44,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:47:44,025 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:47:44,057 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,058 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,058 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,058 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,059 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,059 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,059 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,059 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,060 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,060 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,060 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,060 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,061 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,061 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,061 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,062 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,062 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,062 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,062 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,063 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,064 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,064 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,064 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,064 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,064 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,065 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,065 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,065 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,065 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,066 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,066 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,066 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,066 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,067 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,067 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,067 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,067 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,067 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,068 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,068 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,068 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,068 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,069 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,069 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,069 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,069 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,069 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,070 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,070 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,070 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,070 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,071 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,071 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,071 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,071 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,072 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,072 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,072 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,072 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,073 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,073 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,073 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,073 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,074 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,074 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,074 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,074 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,075 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,075 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,075 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,075 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,076 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,076 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,076 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,076 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,077 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,077 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,077 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,078 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,078 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,078 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,078 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,086 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,086 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,086 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,087 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,087 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,087 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,087 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,087 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,104 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,104 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,105 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,105 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,105 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,105 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,106 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,106 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,106 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,106 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,106 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,107 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,107 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,107 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,107 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,108 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,108 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:44,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:47:44,154 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:47:44,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:47:44,155 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:47:44,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:47:44,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:47:44,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:47:44,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:47:44,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:47:44,172 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-04-18 11:47:44,175 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-04-18 11:47:44,231 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-04-18 11:47:44,231 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-04-18 11:47:44,237 INFO L80 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 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-04-18 11:47:44,242 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-04-18 11:47:44,272 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-04-18 11:47:44,272 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-04-18 11:47:44,274 INFO L80 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 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-04-18 11:47:44,277 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2020-04-18 11:47:44,278 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:47:46,501 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-04-18 11:47:46,658 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2020-04-18 11:47:46,658 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-04-18 11:47:46,662 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-04-18 11:47:46,676 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-04-18 11:47:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-04-18 11:47:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 11:47:46,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,688 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,688 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:47:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-04-18 11:47:46,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,700 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [713557406] [2020-04-18 11:47:46,712 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,724 INFO L259 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2020-04-18 11:47:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-04-18 11:47:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 11:47:46,726 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 2 times [2020-04-18 11:47:46,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248632429] [2020-04-18 11:47:46,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248632429] [2020-04-18 11:47:46,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:46,916 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,918 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,921 INFO L259 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2020-04-18 11:47:46,921 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,930 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:47:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:47:46,937 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-04-18 11:47:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,941 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-04-18 11:47:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-04-18 11:47:46,942 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,943 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [713557406] [2020-04-18 11:47:46,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:47:46,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [713557406] [2020-04-18 11:47:46,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 11:47:46,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:47:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:47:46,951 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-04-18 11:47:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,992 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-04-18 11:47:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 11:47:46,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-04-18 11:47:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:47,005 INFO L225 Difference]: With dead ends: 61 [2020-04-18 11:47:47,005 INFO L226 Difference]: Without dead ends: 53 [2020-04-18 11:47:47,007 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:47:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-04-18 11:47:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-04-18 11:47:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-18 11:47:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-04-18 11:47:47,060 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-04-18 11:47:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:47,061 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-04-18 11:47:47,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 11:47:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-04-18 11:47:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:47,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:47,062 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:47,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:47:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-04-18 11:47:47,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:47,064 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2070759939] [2020-04-18 11:47:47,065 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,068 INFO L259 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-04-18 11:47:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-04-18 11:47:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:47,069 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 2 times [2020-04-18 11:47:47,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:47,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929233824] [2020-04-18 11:47:47,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929233824] [2020-04-18 11:47:47,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722277479] [2020-04-18 11:47:47,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:47,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:47:47,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:47,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:47:47,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:47,298 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 87 treesize of output 85 [2020-04-18 11:47:47,300 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,356 INFO L619 ElimStorePlain]: treesize reduction 69, result has 18.8 percent of original size [2020-04-18 11:47:47,357 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,360 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:47:47,402 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:47:47,403 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,415 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:47:47,416 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,416 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:47:47,450 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:47:47,455 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,464 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:47:47,466 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:47:47,466 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:47:47,528 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:47:47,530 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,540 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:47:47,541 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:47:47,542 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:47:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:47:47,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:47,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 9 [2020-04-18 11:47:47,567 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:47,568 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,570 INFO L259 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-04-18 11:47:47,570 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:47,711 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:47,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-04-18 11:47:47,712 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 10 states. [2020-04-18 11:47:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,774 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-04-18 11:47:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2020-04-18 11:47:47,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:47,775 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2070759939] [2020-04-18 11:47:47,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:47,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:47:47,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2070759939] [2020-04-18 11:47:47,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 11:47:47,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:47,777 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 10 states. [2020-04-18 11:47:52,003 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:47:57,381 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:48:04,980 WARN L192 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:48:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,418 INFO L93 Difference]: Finished difference Result 110 states and 227 transitions. [2020-04-18 11:48:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:48:10,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2020-04-18 11:48:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:10,421 INFO L225 Difference]: With dead ends: 110 [2020-04-18 11:48:10,422 INFO L226 Difference]: Without dead ends: 110 [2020-04-18 11:48:10,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=171, Invalid=380, Unknown=1, NotChecked=0, Total=552 [2020-04-18 11:48:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-18 11:48:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 57. [2020-04-18 11:48:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-18 11:48:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 119 transitions. [2020-04-18 11:48:10,441 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 119 transitions. Word has length 8 [2020-04-18 11:48:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:10,442 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 119 transitions. [2020-04-18 11:48:10,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 11:48:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 119 transitions. [2020-04-18 11:48:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:48:10,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:10,443 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:10,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:10,645 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1539252056, now seen corresponding path program 1 times [2020-04-18 11:48:10,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:10,646 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1393047551] [2020-04-18 11:48:10,647 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,648 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 14 transitions. [2020-04-18 11:48:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 11:48:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:48:10,649 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1539225086, now seen corresponding path program 2 times [2020-04-18 11:48:10,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511111819] [2020-04-18 11:48:10,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511111819] [2020-04-18 11:48:10,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115207081] [2020-04-18 11:48:10,730 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 [2020-04-18 11:48:10,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:48:10,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:10,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,801 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 37 [2020-04-18 11:48:10,802 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 11:48:10,834 INFO L619 ElimStorePlain]: treesize reduction 22, result has 42.1 percent of original size [2020-04-18 11:48:10,835 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,835 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:48:10,869 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:48:10,869 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,880 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:10,880 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,881 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:48:10,905 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:48:10,906 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,915 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:10,917 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:48:10,917 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:48:10,969 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:48:10,971 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,977 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:10,977 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:10,978 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:48:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-18 11:48:10,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2020-04-18 11:48:10,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,993 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,995 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 14 transitions. [2020-04-18 11:48:10,996 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,091 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:11,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:48:11,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:48:11,092 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 11 states. [2020-04-18 11:48:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,180 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-04-18 11:48:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-04-18 11:48:11,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:11,181 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1393047551] [2020-04-18 11:48:11,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:11,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:11,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1393047551] [2020-04-18 11:48:11,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:48:11,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:48:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:48:11,183 INFO L87 Difference]: Start difference. First operand 57 states and 119 transitions. Second operand 11 states. [2020-04-18 11:48:15,407 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:48:19,560 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:48:23,611 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:48:28,024 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:48:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:37,592 INFO L93 Difference]: Finished difference Result 149 states and 317 transitions. [2020-04-18 11:48:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-18 11:48:37,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 11:48:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:37,597 INFO L225 Difference]: With dead ends: 149 [2020-04-18 11:48:37,597 INFO L226 Difference]: Without dead ends: 149 [2020-04-18 11:48:37,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:48:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-04-18 11:48:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 53. [2020-04-18 11:48:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-18 11:48:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-04-18 11:48:37,606 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 10 [2020-04-18 11:48:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:37,606 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-04-18 11:48:37,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:48:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-04-18 11:48:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:37,607 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:37,607 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:37,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:37,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 3 times [2020-04-18 11:48:37,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:37,811 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [292987762] [2020-04-18 11:48:37,811 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:37,812 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:48:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:37,813 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1113175935, now seen corresponding path program 4 times [2020-04-18 11:48:37,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:37,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838347666] [2020-04-18 11:48:37,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:37,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838347666] [2020-04-18 11:48:37,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781117354] [2020-04-18 11:48:37,913 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:37,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:37,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:37,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-18 11:48:37,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:37,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:37,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 11:48:37,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:37,994 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:37,997 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 18 transitions. [2020-04-18 11:48:37,997 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,019 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:48:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:48:38,020 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 7 states. [2020-04-18 11:48:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,034 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-04-18 11:48:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-04-18 11:48:38,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [292987762] [2020-04-18 11:48:38,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:38,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:48:38,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [292987762] [2020-04-18 11:48:38,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 11:48:38,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:48:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:48:38,036 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2020-04-18 11:48:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,054 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2020-04-18 11:48:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-18 11:48:38,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-04-18 11:48:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:38,055 INFO L225 Difference]: With dead ends: 54 [2020-04-18 11:48:38,055 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:48:38,056 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:48:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:48:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-04-18 11:48:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 11:48:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2020-04-18 11:48:38,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2020-04-18 11:48:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:38,063 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2020-04-18 11:48:38,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 11:48:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2020-04-18 11:48:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:38,064 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:38,064 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:38,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:38,266 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 5 times [2020-04-18 11:48:38,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:38,267 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1901304674] [2020-04-18 11:48:38,268 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,269 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-04-18 11:48:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:38,270 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1306529578, now seen corresponding path program 6 times [2020-04-18 11:48:38,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:38,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946789907] [2020-04-18 11:48:38,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:38,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946789907] [2020-04-18 11:48:38,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333982771] [2020-04-18 11:48:38,376 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 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 [2020-04-18 11:48:38,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:48:38,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:38,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:48:38,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:38,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:38,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 11:48:38,456 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:38,460 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,462 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 19 transitions. [2020-04-18 11:48:38,463 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,489 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:48:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:48:38,490 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2020-04-18 11:48:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,513 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-04-18 11:48:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-04-18 11:48:38,514 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:38,515 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1901304674] [2020-04-18 11:48:38,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:38,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:38,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1901304674] [2020-04-18 11:48:38,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 11:48:38,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:48:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:48:38,517 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2020-04-18 11:48:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,542 INFO L93 Difference]: Finished difference Result 55 states and 109 transitions. [2020-04-18 11:48:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:48:38,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-18 11:48:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:38,543 INFO L225 Difference]: With dead ends: 55 [2020-04-18 11:48:38,543 INFO L226 Difference]: Without dead ends: 55 [2020-04-18 11:48:38,544 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:48:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-18 11:48:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-04-18 11:48:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:48:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2020-04-18 11:48:38,549 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 13 [2020-04-18 11:48:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:38,549 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2020-04-18 11:48:38,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 11:48:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2020-04-18 11:48:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:48:38,550 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:38,550 INFO L425 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:38,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:38,760 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash 991132447, now seen corresponding path program 7 times [2020-04-18 11:48:38,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:38,761 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1220163872] [2020-04-18 11:48:38,762 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,762 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:48:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 11:48:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:48:38,763 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 992010847, now seen corresponding path program 8 times [2020-04-18 11:48:38,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:38,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446220136] [2020-04-18 11:48:38,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:38,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446220136] [2020-04-18 11:48:38,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894980167] [2020-04-18 11:48:38,864 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 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 [2020-04-18 11:48:38,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:38,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:38,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:48:38,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:38,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:38,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-18 11:48:38,937 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:38,939 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,942 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 20 transitions. [2020-04-18 11:48:38,942 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,983 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:48:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:48:38,984 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 9 states. [2020-04-18 11:48:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,016 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-04-18 11:48:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-04-18 11:48:39,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:39,017 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1220163872] [2020-04-18 11:48:39,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:39,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:39,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1220163872] [2020-04-18 11:48:39,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 11:48:39,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:48:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:48:39,018 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand 9 states. [2020-04-18 11:48:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,044 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2020-04-18 11:48:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:48:39,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-04-18 11:48:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:39,046 INFO L225 Difference]: With dead ends: 56 [2020-04-18 11:48:39,046 INFO L226 Difference]: Without dead ends: 56 [2020-04-18 11:48:39,046 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:48:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-04-18 11:48:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-04-18 11:48:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-18 11:48:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 110 transitions. [2020-04-18 11:48:39,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 110 transitions. Word has length 14 [2020-04-18 11:48:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:39,051 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 110 transitions. [2020-04-18 11:48:39,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 11:48:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2020-04-18 11:48:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:48:39,052 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:39,052 INFO L425 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:39,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:39,253 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -768558410, now seen corresponding path program 9 times [2020-04-18 11:48:39,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:39,254 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [907157602] [2020-04-18 11:48:39,254 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:39,255 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2020-04-18 11:48:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-04-18 11:48:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:48:39,256 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash -767680010, now seen corresponding path program 10 times [2020-04-18 11:48:39,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:39,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134102337] [2020-04-18 11:48:39,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:39,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134102337] [2020-04-18 11:48:39,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107488331] [2020-04-18 11:48:39,335 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 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 [2020-04-18 11:48:39,385 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:39,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:39,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:48:39,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:39,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:39,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-18 11:48:39,408 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:39,409 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:39,412 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 21 transitions. [2020-04-18 11:48:39,412 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:39,467 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:48:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 11:48:39,467 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 10 states. [2020-04-18 11:48:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,513 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-04-18 11:48:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-04-18 11:48:39,514 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:39,514 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [907157602] [2020-04-18 11:48:39,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:39,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:48:39,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [907157602] [2020-04-18 11:48:39,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 11:48:39,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:48:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 11:48:39,516 INFO L87 Difference]: Start difference. First operand 56 states and 110 transitions. Second operand 10 states. [2020-04-18 11:48:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,538 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2020-04-18 11:48:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 11:48:39,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-04-18 11:48:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:39,540 INFO L225 Difference]: With dead ends: 57 [2020-04-18 11:48:39,540 INFO L226 Difference]: Without dead ends: 57 [2020-04-18 11:48:39,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 11:48:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-04-18 11:48:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-04-18 11:48:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-18 11:48:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 111 transitions. [2020-04-18 11:48:39,544 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 111 transitions. Word has length 15 [2020-04-18 11:48:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:39,545 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 111 transitions. [2020-04-18 11:48:39,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 11:48:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 111 transitions. [2020-04-18 11:48:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:48:39,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:39,546 INFO L425 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:39,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:39,750 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:48:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 515599871, now seen corresponding path program 11 times [2020-04-18 11:48:39,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:39,752 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2126374630] [2020-04-18 11:48:39,752 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:39,753 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-04-18 11:48:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-04-18 11:48:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:48:39,754 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 516478271, now seen corresponding path program 12 times [2020-04-18 11:48:39,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:39,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434717370] [2020-04-18 11:48:39,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:48:39,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434717370] [2020-04-18 11:48:39,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315672865] [2020-04-18 11:48:39,854 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 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 [2020-04-18 11:48:39,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:48:39,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:39,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:48:39,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:39,918 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 165 treesize of output 161 [2020-04-18 11:48:39,919 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:39,965 INFO L619 ElimStorePlain]: treesize reduction 132, result has 10.8 percent of original size [2020-04-18 11:48:39,965 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:39,966 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:48:40,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:48:40,003 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:40,013 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:40,013 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:40,014 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:48:40,041 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:48:40,042 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:40,050 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:40,051 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:48:40,051 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:48:40,113 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:48:40,114 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:48:40,121 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:48:40,122 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:48:40,122 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:48:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-18 11:48:40,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:40,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2020-04-18 11:48:40,148 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:40,150 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:40,153 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 22 transitions. [2020-04-18 11:48:40,153 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:40,343 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:48:40,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:40,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:48:40,344 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 16 states. [2020-04-18 11:48:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:40,628 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-04-18 11:48:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-04-18 11:48:40,629 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:40,630 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2126374630] [2020-04-18 11:48:40,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:40,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:40,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2126374630] [2020-04-18 11:48:40,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:48:40,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:48:40,632 INFO L87 Difference]: Start difference. First operand 57 states and 111 transitions. Second operand 16 states. [2020-04-18 11:48:44,808 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:48:48,888 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:48:52,938 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:48:57,629 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:49:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:03,405 INFO L93 Difference]: Finished difference Result 104 states and 205 transitions. [2020-04-18 11:49:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 11:49:03,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-04-18 11:49:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:03,407 INFO L225 Difference]: With dead ends: 104 [2020-04-18 11:49:03,407 INFO L226 Difference]: Without dead ends: 104 [2020-04-18 11:49:03,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:49:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-18 11:49:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2020-04-18 11:49:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-18 11:49:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-04-18 11:49:03,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 16 [2020-04-18 11:49:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:03,413 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-04-18 11:49:03,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:49:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-04-18 11:49:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 11:49:03,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:03,414 INFO L425 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:03,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:03,615 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1669800918, now seen corresponding path program 13 times [2020-04-18 11:49:03,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:03,616 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [927286739] [2020-04-18 11:49:03,616 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:03,617 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2020-04-18 11:49:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:49:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 11:49:03,617 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1670679318, now seen corresponding path program 14 times [2020-04-18 11:49:03,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:03,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115148533] [2020-04-18 11:49:03,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:03,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115148533] [2020-04-18 11:49:03,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134509833] [2020-04-18 11:49:03,725 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 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 [2020-04-18 11:49:03,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:03,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:03,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:03,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:03,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:03,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-18 11:49:03,794 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:03,796 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:03,799 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-04-18 11:49:03,799 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:03,862 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:49:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:49:03,863 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 12 states. [2020-04-18 11:49:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:03,917 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-04-18 11:49:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-04-18 11:49:03,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:03,918 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [927286739] [2020-04-18 11:49:03,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:03,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 11:49:03,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [927286739] [2020-04-18 11:49:03,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:49:03,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:49:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:49:03,919 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 12 states. [2020-04-18 11:49:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:03,946 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2020-04-18 11:49:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:49:03,947 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-04-18 11:49:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:03,948 INFO L225 Difference]: With dead ends: 59 [2020-04-18 11:49:03,948 INFO L226 Difference]: Without dead ends: 59 [2020-04-18 11:49:03,948 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:49:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-04-18 11:49:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-04-18 11:49:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-18 11:49:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 113 transitions. [2020-04-18 11:49:03,952 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 113 transitions. Word has length 17 [2020-04-18 11:49:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:03,953 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 113 transitions. [2020-04-18 11:49:03,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:49:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 113 transitions. [2020-04-18 11:49:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:49:03,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:03,954 INFO L425 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:04,158 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1204672289, now seen corresponding path program 15 times [2020-04-18 11:49:04,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:04,158 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1597378309] [2020-04-18 11:49:04,159 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:04,159 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-04-18 11:49:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-04-18 11:49:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:49:04,160 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1203793889, now seen corresponding path program 16 times [2020-04-18 11:49:04,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:04,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915674089] [2020-04-18 11:49:04,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:04,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915674089] [2020-04-18 11:49:04,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29964519] [2020-04-18 11:49:04,292 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 [2020-04-18 11:49:04,352 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:04,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:04,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:04,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:04,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:04,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-18 11:49:04,377 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:04,379 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:04,383 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 24 transitions. [2020-04-18 11:49:04,383 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:04,463 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:49:04,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:49:04,464 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 13 states. [2020-04-18 11:49:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:04,537 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-04-18 11:49:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-04-18 11:49:04,537 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:04,538 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1597378309] [2020-04-18 11:49:04,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:04,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 11:49:04,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1597378309] [2020-04-18 11:49:04,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 11:49:04,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:04,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:49:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:49:04,539 INFO L87 Difference]: Start difference. First operand 59 states and 113 transitions. Second operand 13 states. [2020-04-18 11:49:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:04,571 INFO L93 Difference]: Finished difference Result 60 states and 114 transitions. [2020-04-18 11:49:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 11:49:04,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-04-18 11:49:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:04,573 INFO L225 Difference]: With dead ends: 60 [2020-04-18 11:49:04,573 INFO L226 Difference]: Without dead ends: 60 [2020-04-18 11:49:04,573 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:49:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-18 11:49:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-04-18 11:49:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-18 11:49:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 114 transitions. [2020-04-18 11:49:04,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 114 transitions. Word has length 18 [2020-04-18 11:49:04,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:04,583 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 114 transitions. [2020-04-18 11:49:04,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 11:49:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 114 transitions. [2020-04-18 11:49:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:49:04,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:04,586 INFO L425 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:04,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:04,787 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:04,788 INFO L82 PathProgramCache]: Analyzing trace with hash -119028490, now seen corresponding path program 17 times [2020-04-18 11:49:04,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:04,789 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [365914740] [2020-04-18 11:49:04,789 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:04,790 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2020-04-18 11:49:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-04-18 11:49:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:49:04,791 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:04,791 INFO L82 PathProgramCache]: Analyzing trace with hash -118150090, now seen corresponding path program 18 times [2020-04-18 11:49:04,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:04,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460797044] [2020-04-18 11:49:04,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:04,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460797044] [2020-04-18 11:49:04,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167414970] [2020-04-18 11:49:04,918 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 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 [2020-04-18 11:49:04,972 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:04,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:04,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:49:04,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:04,984 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 37 [2020-04-18 11:49:04,984 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 11:49:05,009 INFO L619 ElimStorePlain]: treesize reduction 22, result has 42.1 percent of original size [2020-04-18 11:49:05,010 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,011 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:49:05,041 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:49:05,041 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,047 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:05,047 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,047 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:49:05,076 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:49:05,077 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,085 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:05,086 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:49:05,086 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:49:05,144 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:49:05,145 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,153 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:05,154 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:05,154 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:49:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-04-18 11:49:05,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:05,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2020-04-18 11:49:05,174 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:05,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:05,181 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2020-04-18 11:49:05,181 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:05,414 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:49:05,414 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 19 states. [2020-04-18 11:49:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:05,827 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-04-18 11:49:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-04-18 11:49:05,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:05,828 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [365914740] [2020-04-18 11:49:05,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:05,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:05,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [365914740] [2020-04-18 11:49:05,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 11:49:05,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:49:05,829 INFO L87 Difference]: Start difference. First operand 60 states and 114 transitions. Second operand 19 states. [2020-04-18 11:49:10,004 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:49:14,084 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:49:16,966 WARN L192 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:49:21,071 WARN L192 SmtUtils]: Spent 3.54 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:49:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:30,602 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2020-04-18 11:49:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 11:49:30,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-04-18 11:49:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:30,606 INFO L225 Difference]: With dead ends: 107 [2020-04-18 11:49:30,606 INFO L226 Difference]: Without dead ends: 107 [2020-04-18 11:49:30,607 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=610, Invalid=1111, Unknown=1, NotChecked=0, Total=1722 [2020-04-18 11:49:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-18 11:49:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 61. [2020-04-18 11:49:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-18 11:49:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 115 transitions. [2020-04-18 11:49:30,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 115 transitions. Word has length 19 [2020-04-18 11:49:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:30,611 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 115 transitions. [2020-04-18 11:49:30,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 11:49:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 11:49:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 11:49:30,612 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:30,612 INFO L425 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:30,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:30,816 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:30,817 INFO L82 PathProgramCache]: Analyzing trace with hash -823809089, now seen corresponding path program 19 times [2020-04-18 11:49:30,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:30,817 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1351748257] [2020-04-18 11:49:30,818 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:30,819 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-04-18 11:49:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 11:49:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 11:49:30,820 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash -822930689, now seen corresponding path program 20 times [2020-04-18 11:49:30,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:30,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227918420] [2020-04-18 11:49:30,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:30,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227918420] [2020-04-18 11:49:30,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560969602] [2020-04-18 11:49:30,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:49:31,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:31,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:31,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 11:49:31,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:31,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:31,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-18 11:49:31,017 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:31,020 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:31,024 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 26 transitions. [2020-04-18 11:49:31,024 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:31,129 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:31,130 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 15 states. [2020-04-18 11:49:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:31,227 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-04-18 11:49:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-04-18 11:49:31,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:31,227 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1351748257] [2020-04-18 11:49:31,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:31,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 11:49:31,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1351748257] [2020-04-18 11:49:31,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 11:49:31,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:31,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:31,229 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 15 states. [2020-04-18 11:49:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:31,263 INFO L93 Difference]: Finished difference Result 62 states and 116 transitions. [2020-04-18 11:49:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 11:49:31,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-04-18 11:49:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:31,265 INFO L225 Difference]: With dead ends: 62 [2020-04-18 11:49:31,265 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 11:49:31,266 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 11:49:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-04-18 11:49:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-18 11:49:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 116 transitions. [2020-04-18 11:49:31,270 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 116 transitions. Word has length 20 [2020-04-18 11:49:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:31,270 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 116 transitions. [2020-04-18 11:49:31,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 11:49:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 116 transitions. [2020-04-18 11:49:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 11:49:31,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:31,271 INFO L425 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:31,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:31,475 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1197171178, now seen corresponding path program 21 times [2020-04-18 11:49:31,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:31,476 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [886998783] [2020-04-18 11:49:31,477 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:31,477 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2020-04-18 11:49:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-04-18 11:49:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 11:49:31,478 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:31,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1196292778, now seen corresponding path program 22 times [2020-04-18 11:49:31,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:31,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172811646] [2020-04-18 11:49:31,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:31,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172811646] [2020-04-18 11:49:31,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380057693] [2020-04-18 11:49:31,609 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 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 [2020-04-18 11:49:31,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:31,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:31,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:49:31,682 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:31,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:31,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-18 11:49:31,702 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:31,712 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:31,723 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2020-04-18 11:49:31,723 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:31,887 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:49:31,888 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 16 states. [2020-04-18 11:49:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:32,029 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-04-18 11:49:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-04-18 11:49:32,030 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:32,030 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [886998783] [2020-04-18 11:49:32,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:32,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-04-18 11:49:32,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [886998783] [2020-04-18 11:49:32,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:49:32,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:49:32,033 INFO L87 Difference]: Start difference. First operand 62 states and 116 transitions. Second operand 16 states. [2020-04-18 11:49:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:32,073 INFO L93 Difference]: Finished difference Result 63 states and 117 transitions. [2020-04-18 11:49:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:49:32,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-18 11:49:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:32,075 INFO L225 Difference]: With dead ends: 63 [2020-04-18 11:49:32,075 INFO L226 Difference]: Without dead ends: 63 [2020-04-18 11:49:32,075 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:49:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-18 11:49:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-04-18 11:49:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-18 11:49:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 117 transitions. [2020-04-18 11:49:32,080 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 117 transitions. Word has length 21 [2020-04-18 11:49:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:32,080 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 117 transitions. [2020-04-18 11:49:32,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:49:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 117 transitions. [2020-04-18 11:49:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 11:49:32,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:32,084 INFO L425 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:32,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:32,284 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash 113505951, now seen corresponding path program 23 times [2020-04-18 11:49:32,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:32,285 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1033782397] [2020-04-18 11:49:32,286 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:32,287 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-04-18 11:49:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-04-18 11:49:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 11:49:32,287 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 114384351, now seen corresponding path program 24 times [2020-04-18 11:49:32,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:32,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770137185] [2020-04-18 11:49:32,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:32,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770137185] [2020-04-18 11:49:32,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772445078] [2020-04-18 11:49:32,455 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 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 [2020-04-18 11:49:32,515 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:32,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:32,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:49:32,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:32,535 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 223 treesize of output 215 [2020-04-18 11:49:32,536 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,585 INFO L619 ElimStorePlain]: treesize reduction 180, result has 8.2 percent of original size [2020-04-18 11:49:32,585 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,586 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:49:32,626 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:49:32,626 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,634 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:32,634 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,634 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:49:32,663 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:49:32,664 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,673 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:32,674 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:49:32,675 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:49:32,752 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:49:32,752 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,758 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:49:32,759 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:49:32,759 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:49:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-04-18 11:49:32,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:32,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 21 [2020-04-18 11:49:32,782 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:32,784 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:32,788 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 28 transitions. [2020-04-18 11:49:32,788 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:33,031 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:49:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:49:33,031 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 22 states. [2020-04-18 11:49:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:33,555 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-04-18 11:49:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-04-18 11:49:33,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:33,555 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1033782397] [2020-04-18 11:49:33,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:33,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:33,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1033782397] [2020-04-18 11:49:33,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 11:49:33,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:49:33,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:49:33,557 INFO L87 Difference]: Start difference. First operand 63 states and 117 transitions. Second operand 22 states. [2020-04-18 11:49:37,732 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:49:41,810 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:49:44,440 WARN L192 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:49:49,520 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:49:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:58,824 INFO L93 Difference]: Finished difference Result 125 states and 242 transitions. [2020-04-18 11:49:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 11:49:58,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-04-18 11:49:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:58,825 INFO L225 Difference]: With dead ends: 125 [2020-04-18 11:49:58,826 INFO L226 Difference]: Without dead ends: 125 [2020-04-18 11:49:58,827 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=847, Invalid=1504, Unknown=1, NotChecked=0, Total=2352 [2020-04-18 11:49:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-18 11:49:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 64. [2020-04-18 11:49:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-18 11:49:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 118 transitions. [2020-04-18 11:49:58,830 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 118 transitions. Word has length 22 [2020-04-18 11:49:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:58,830 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 118 transitions. [2020-04-18 11:49:58,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 11:49:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 118 transitions. [2020-04-18 11:49:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 11:49:58,831 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:58,831 INFO L425 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:59,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:59,035 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2089791286, now seen corresponding path program 25 times [2020-04-18 11:49:59,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:59,036 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [163316419] [2020-04-18 11:49:59,037 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:59,038 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2020-04-18 11:49:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 11:49:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 11:49:59,039 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2090669686, now seen corresponding path program 26 times [2020-04-18 11:49:59,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:59,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092203614] [2020-04-18 11:49:59,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:59,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092203614] [2020-04-18 11:49:59,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337073461] [2020-04-18 11:49:59,210 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 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 [2020-04-18 11:49:59,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:59,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:59,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 11:49:59,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:49:59,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:59,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 11:49:59,284 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:59,286 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:59,290 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2020-04-18 11:49:59,290 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:59,404 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:49:59,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:49:59,405 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 18 states. [2020-04-18 11:49:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:59,575 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-04-18 11:49:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-04-18 11:49:59,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:59,576 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [163316419] [2020-04-18 11:49:59,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:59,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-04-18 11:49:59,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [163316419] [2020-04-18 11:49:59,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 11:49:59,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:49:59,578 INFO L87 Difference]: Start difference. First operand 64 states and 118 transitions. Second operand 18 states. [2020-04-18 11:49:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:59,611 INFO L93 Difference]: Finished difference Result 65 states and 119 transitions. [2020-04-18 11:49:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:49:59,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-04-18 11:49:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:59,616 INFO L225 Difference]: With dead ends: 65 [2020-04-18 11:49:59,616 INFO L226 Difference]: Without dead ends: 65 [2020-04-18 11:49:59,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:49:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-18 11:49:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-04-18 11:49:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-18 11:49:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 119 transitions. [2020-04-18 11:49:59,620 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 119 transitions. Word has length 23 [2020-04-18 11:49:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:59,621 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 119 transitions. [2020-04-18 11:49:59,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 11:49:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 119 transitions. [2020-04-18 11:49:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 11:49:59,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:59,622 INFO L425 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:59,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:59,823 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:49:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1069872769, now seen corresponding path program 27 times [2020-04-18 11:49:59,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:59,824 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [476184420] [2020-04-18 11:49:59,825 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:59,826 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-04-18 11:49:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-04-18 11:49:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 11:49:59,826 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:59,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1068994369, now seen corresponding path program 28 times [2020-04-18 11:49:59,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:59,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998157128] [2020-04-18 11:49:59,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:00,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998157128] [2020-04-18 11:50:00,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175323313] [2020-04-18 11:50:00,039 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 [2020-04-18 11:50:00,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:00,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:00,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-18 11:50:00,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:00,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:00,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-18 11:50:00,124 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:00,130 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:00,135 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 30 transitions. [2020-04-18 11:50:00,135 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:00,326 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:50:00,328 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 19 states. [2020-04-18 11:50:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:00,501 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-04-18 11:50:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-04-18 11:50:00,502 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:00,502 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [476184420] [2020-04-18 11:50:00,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-04-18 11:50:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [476184420] [2020-04-18 11:50:00,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 11:50:00,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:50:00,504 INFO L87 Difference]: Start difference. First operand 65 states and 119 transitions. Second operand 19 states. [2020-04-18 11:50:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:00,534 INFO L93 Difference]: Finished difference Result 66 states and 120 transitions. [2020-04-18 11:50:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-18 11:50:00,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-04-18 11:50:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:00,535 INFO L225 Difference]: With dead ends: 66 [2020-04-18 11:50:00,535 INFO L226 Difference]: Without dead ends: 66 [2020-04-18 11:50:00,536 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:50:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-18 11:50:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-04-18 11:50:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 11:50:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 120 transitions. [2020-04-18 11:50:00,541 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 120 transitions. Word has length 24 [2020-04-18 11:50:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:00,542 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 120 transitions. [2020-04-18 11:50:00,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 11:50:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 120 transitions. [2020-04-18 11:50:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 11:50:00,544 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:00,544 INFO L425 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:00,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:00,745 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:00,746 INFO L82 PathProgramCache]: Analyzing trace with hash -235210666, now seen corresponding path program 29 times [2020-04-18 11:50:00,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:00,746 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1416466972] [2020-04-18 11:50:00,746 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:00,749 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2020-04-18 11:50:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-04-18 11:50:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 11:50:00,750 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash -234332266, now seen corresponding path program 30 times [2020-04-18 11:50:00,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:00,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854440576] [2020-04-18 11:50:00,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:00,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854440576] [2020-04-18 11:50:00,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702491059] [2020-04-18 11:50:00,938 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 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 [2020-04-18 11:50:00,989 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:00,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:00,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:50:00,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:01,009 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 37 [2020-04-18 11:50:01,010 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 11:50:01,034 INFO L619 ElimStorePlain]: treesize reduction 22, result has 42.1 percent of original size [2020-04-18 11:50:01,035 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,035 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:50:01,069 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:50:01,069 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,077 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:01,077 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,077 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:50:01,104 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:50:01,104 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,112 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:01,112 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:50:01,112 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:50:01,175 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:50:01,176 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,182 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:01,182 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:01,182 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:50:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-04-18 11:50:01,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:01,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 24 [2020-04-18 11:50:01,212 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:01,216 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:01,224 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2020-04-18 11:50:01,224 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:01,551 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:50:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:50:01,551 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 25 states. [2020-04-18 11:50:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:02,202 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-04-18 11:50:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-04-18 11:50:02,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:02,203 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1416466972] [2020-04-18 11:50:02,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:02,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:50:02,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1416466972] [2020-04-18 11:50:02,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 11:50:02,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:02,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:50:02,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1179, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:50:02,204 INFO L87 Difference]: Start difference. First operand 66 states and 120 transitions. Second operand 25 states. [2020-04-18 11:50:06,385 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:50:10,455 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:50:14,510 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:50:17,496 WARN L192 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:50:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:24,668 INFO L93 Difference]: Finished difference Result 113 states and 214 transitions. [2020-04-18 11:50:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 11:50:24,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-18 11:50:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:24,669 INFO L225 Difference]: With dead ends: 113 [2020-04-18 11:50:24,669 INFO L226 Difference]: Without dead ends: 113 [2020-04-18 11:50:24,670 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1040, Invalid=1822, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 11:50:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-18 11:50:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 67. [2020-04-18 11:50:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-18 11:50:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 121 transitions. [2020-04-18 11:50:24,674 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 121 transitions. Word has length 25 [2020-04-18 11:50:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:24,674 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 121 transitions. [2020-04-18 11:50:24,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 11:50:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 121 transitions. [2020-04-18 11:50:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 11:50:24,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:24,675 INFO L425 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:24,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:24,883 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash -130489249, now seen corresponding path program 31 times [2020-04-18 11:50:24,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:24,884 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1388418468] [2020-04-18 11:50:24,885 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:24,886 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-04-18 11:50:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-04-18 11:50:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 11:50:24,887 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -129610849, now seen corresponding path program 32 times [2020-04-18 11:50:24,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:24,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769564879] [2020-04-18 11:50:24,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:25,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769564879] [2020-04-18 11:50:25,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922954826] [2020-04-18 11:50:25,129 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 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 [2020-04-18 11:50:25,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:25,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:25,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:50:25,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:25,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:25,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-18 11:50:25,197 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:25,202 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:25,209 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 32 transitions. [2020-04-18 11:50:25,209 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:25,402 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 11:50:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:50:25,403 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 21 states. [2020-04-18 11:50:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:25,608 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-04-18 11:50:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-04-18 11:50:25,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:25,609 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1388418468] [2020-04-18 11:50:25,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:25,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 11:50:25,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1388418468] [2020-04-18 11:50:25,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 11:50:25,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 11:50:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:50:25,611 INFO L87 Difference]: Start difference. First operand 67 states and 121 transitions. Second operand 21 states. [2020-04-18 11:50:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:25,656 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2020-04-18 11:50:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 11:50:25,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-04-18 11:50:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:25,657 INFO L225 Difference]: With dead ends: 68 [2020-04-18 11:50:25,657 INFO L226 Difference]: Without dead ends: 68 [2020-04-18 11:50:25,658 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:50:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-18 11:50:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-04-18 11:50:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-18 11:50:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 122 transitions. [2020-04-18 11:50:25,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 122 transitions. Word has length 26 [2020-04-18 11:50:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:25,662 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 122 transitions. [2020-04-18 11:50:25,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 11:50:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 122 transitions. [2020-04-18 11:50:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 11:50:25,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:25,662 INFO L425 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:25,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:25,865 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1179092618, now seen corresponding path program 33 times [2020-04-18 11:50:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:25,866 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1698683005] [2020-04-18 11:50:25,867 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:25,868 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 35 transitions. [2020-04-18 11:50:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-04-18 11:50:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 11:50:25,869 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1178214218, now seen corresponding path program 34 times [2020-04-18 11:50:25,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:25,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264658780] [2020-04-18 11:50:25,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:26,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264658780] [2020-04-18 11:50:26,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196147353] [2020-04-18 11:50:26,129 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 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 [2020-04-18 11:50:26,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:26,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:26,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 11:50:26,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:26,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:26,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-18 11:50:26,201 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:26,205 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:26,213 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2020-04-18 11:50:26,213 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:26,426 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:50:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:50:26,427 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 22 states. [2020-04-18 11:50:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:26,673 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-04-18 11:50:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-04-18 11:50:26,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:26,674 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1698683005] [2020-04-18 11:50:26,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:26,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-04-18 11:50:26,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1698683005] [2020-04-18 11:50:26,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 11:50:26,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:50:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:50:26,675 INFO L87 Difference]: Start difference. First operand 68 states and 122 transitions. Second operand 22 states. [2020-04-18 11:50:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:26,714 INFO L93 Difference]: Finished difference Result 69 states and 123 transitions. [2020-04-18 11:50:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 11:50:26,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-04-18 11:50:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:26,716 INFO L225 Difference]: With dead ends: 69 [2020-04-18 11:50:26,716 INFO L226 Difference]: Without dead ends: 69 [2020-04-18 11:50:26,717 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:50:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-18 11:50:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-04-18 11:50:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-18 11:50:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 123 transitions. [2020-04-18 11:50:26,720 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 123 transitions. Word has length 27 [2020-04-18 11:50:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:26,720 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 123 transitions. [2020-04-18 11:50:26,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 11:50:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 123 transitions. [2020-04-18 11:50:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 11:50:26,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:26,721 INFO L425 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:26,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:26,925 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 673941311, now seen corresponding path program 35 times [2020-04-18 11:50:26,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:26,926 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [779033384] [2020-04-18 11:50:26,927 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:26,927 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-04-18 11:50:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-04-18 11:50:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 11:50:26,928 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash 674819711, now seen corresponding path program 36 times [2020-04-18 11:50:26,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:26,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439629676] [2020-04-18 11:50:26,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439629676] [2020-04-18 11:50:27,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461987889] [2020-04-18 11:50:27,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:50:27,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:27,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:27,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:50:27,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:27,251 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 57 treesize of output 55 [2020-04-18 11:50:27,252 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,286 INFO L619 ElimStorePlain]: treesize reduction 39, result has 29.1 percent of original size [2020-04-18 11:50:27,286 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,287 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:50:27,326 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:50:27,327 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,335 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:27,336 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,336 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:50:27,373 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:50:27,374 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,385 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:27,386 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:50:27,386 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:50:27,466 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:50:27,467 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,472 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:27,472 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:27,473 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:50:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-04-18 11:50:27,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:27,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 27 [2020-04-18 11:50:27,508 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:27,513 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:27,522 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 34 transitions. [2020-04-18 11:50:27,522 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:27,880 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:50:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:50:27,881 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 28 states. [2020-04-18 11:50:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:28,788 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-04-18 11:50:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-04-18 11:50:28,789 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:28,789 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [779033384] [2020-04-18 11:50:28,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:28,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:50:28,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [779033384] [2020-04-18 11:50:28,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:50:28,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:50:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1530, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 11:50:28,792 INFO L87 Difference]: Start difference. First operand 69 states and 123 transitions. Second operand 28 states. [2020-04-18 11:50:32,970 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:50:37,051 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:50:39,988 WARN L192 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:50:44,164 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:50:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:50,989 INFO L93 Difference]: Finished difference Result 116 states and 217 transitions. [2020-04-18 11:50:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 11:50:50,989 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2020-04-18 11:50:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:50,990 INFO L225 Difference]: With dead ends: 116 [2020-04-18 11:50:50,990 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 11:50:50,992 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1295, Invalid=2245, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:50:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 11:50:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2020-04-18 11:50:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-18 11:50:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2020-04-18 11:50:50,995 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 28 [2020-04-18 11:50:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:50,995 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2020-04-18 11:50:50,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:50:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2020-04-18 11:50:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 11:50:50,996 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:50,996 INFO L425 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:51,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:51,200 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2011549034, now seen corresponding path program 37 times [2020-04-18 11:50:51,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:51,201 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1827158818] [2020-04-18 11:50:51,202 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:51,202 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2020-04-18 11:50:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-04-18 11:50:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 11:50:51,203 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2010670634, now seen corresponding path program 38 times [2020-04-18 11:50:51,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:51,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429858874] [2020-04-18 11:50:51,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:51,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429858874] [2020-04-18 11:50:51,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506225894] [2020-04-18 11:50:51,467 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 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 [2020-04-18 11:50:51,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:51,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:51,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 11:50:51,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:51,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:51,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-18 11:50:51,557 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:51,564 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:51,572 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2020-04-18 11:50:51,572 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:51,816 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:50:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:50:51,817 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 24 states. [2020-04-18 11:50:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:52,085 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-04-18 11:50:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-04-18 11:50:52,085 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:52,086 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1827158818] [2020-04-18 11:50:52,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:52,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-04-18 11:50:52,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1827158818] [2020-04-18 11:50:52,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:50:52,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:50:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:50:52,087 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand 24 states. [2020-04-18 11:50:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:52,126 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2020-04-18 11:50:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 11:50:52,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-04-18 11:50:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:52,127 INFO L225 Difference]: With dead ends: 71 [2020-04-18 11:50:52,127 INFO L226 Difference]: Without dead ends: 71 [2020-04-18 11:50:52,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:50:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-18 11:50:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-04-18 11:50:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:50:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 125 transitions. [2020-04-18 11:50:52,131 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 125 transitions. Word has length 29 [2020-04-18 11:50:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:52,131 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 125 transitions. [2020-04-18 11:50:52,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:50:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 125 transitions. [2020-04-18 11:50:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 11:50:52,132 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:52,132 INFO L425 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:52,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:52,338 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 637596191, now seen corresponding path program 39 times [2020-04-18 11:50:52,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:52,339 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1776110733] [2020-04-18 11:50:52,339 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:52,340 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-04-18 11:50:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:50:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 11:50:52,340 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash 638474591, now seen corresponding path program 40 times [2020-04-18 11:50:52,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:52,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290968301] [2020-04-18 11:50:52,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:52,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290968301] [2020-04-18 11:50:52,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548449297] [2020-04-18 11:50:52,641 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:50:52,698 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:52,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:52,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-18 11:50:52,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:52,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:52,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-18 11:50:52,723 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:52,728 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:52,738 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 36 transitions. [2020-04-18 11:50:52,739 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:52,982 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:50:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:50:52,983 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 25 states. [2020-04-18 11:50:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:53,278 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-04-18 11:50:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-04-18 11:50:53,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:53,278 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1776110733] [2020-04-18 11:50:53,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:53,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-04-18 11:50:53,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1776110733] [2020-04-18 11:50:53,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 11:50:53,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:50:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:50:53,280 INFO L87 Difference]: Start difference. First operand 71 states and 125 transitions. Second operand 25 states. [2020-04-18 11:50:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:53,323 INFO L93 Difference]: Finished difference Result 72 states and 126 transitions. [2020-04-18 11:50:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 11:50:53,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-04-18 11:50:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:53,324 INFO L225 Difference]: With dead ends: 72 [2020-04-18 11:50:53,325 INFO L226 Difference]: Without dead ends: 72 [2020-04-18 11:50:53,325 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:50:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-18 11:50:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-04-18 11:50:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-18 11:50:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 126 transitions. [2020-04-18 11:50:53,328 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 126 transitions. Word has length 30 [2020-04-18 11:50:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:53,328 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 126 transitions. [2020-04-18 11:50:53,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 11:50:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 126 transitions. [2020-04-18 11:50:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 11:50:53,329 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:53,329 INFO L425 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:53,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:53,530 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:50:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1156719542, now seen corresponding path program 41 times [2020-04-18 11:50:53,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:53,531 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1430345912] [2020-04-18 11:50:53,532 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:53,533 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 39 transitions. [2020-04-18 11:50:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-04-18 11:50:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 11:50:53,534 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1157597942, now seen corresponding path program 42 times [2020-04-18 11:50:53,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:53,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509335418] [2020-04-18 11:50:53,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:50:53,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509335418] [2020-04-18 11:50:53,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668762477] [2020-04-18 11:50:53,838 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 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 [2020-04-18 11:50:53,893 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:53,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:53,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:50:53,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:53,915 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 37 [2020-04-18 11:50:53,915 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 11:50:53,940 INFO L619 ElimStorePlain]: treesize reduction 22, result has 42.1 percent of original size [2020-04-18 11:50:53,940 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:53,941 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:50:53,995 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:50:53,995 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:54,002 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:54,003 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:54,003 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:50:54,031 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:50:54,031 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:54,039 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:54,040 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:50:54,041 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:50:54,106 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:50:54,107 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:50:54,113 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:50:54,114 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:50:54,114 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:50:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-04-18 11:50:54,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:54,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [24] total 30 [2020-04-18 11:50:54,139 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:54,145 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:54,156 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2020-04-18 11:50:54,156 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:54,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:50:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:50:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:50:54,589 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 31 states. [2020-04-18 11:50:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:55,595 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-04-18 11:50:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-04-18 11:50:55,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:55,596 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1430345912] [2020-04-18 11:50:55,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:55,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:50:55,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1430345912] [2020-04-18 11:50:55,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 11:50:55,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:50:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=1926, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 11:50:55,599 INFO L87 Difference]: Start difference. First operand 72 states and 126 transitions. Second operand 31 states. [2020-04-18 11:50:59,791 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:51:03,890 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:51:07,935 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:51:12,095 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:51:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:19,890 INFO L93 Difference]: Finished difference Result 119 states and 220 transitions. [2020-04-18 11:51:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 11:51:19,891 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2020-04-18 11:51:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:19,891 INFO L225 Difference]: With dead ends: 119 [2020-04-18 11:51:19,891 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 11:51:19,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1577, Invalid=2713, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 11:51:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 11:51:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 73. [2020-04-18 11:51:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-18 11:51:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-04-18 11:51:19,895 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 31 [2020-04-18 11:51:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:19,895 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-04-18 11:51:19,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 11:51:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-04-18 11:51:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 11:51:19,896 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:19,896 INFO L425 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:20,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:20,098 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash 69674239, now seen corresponding path program 43 times [2020-04-18 11:51:20,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:20,099 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [213487205] [2020-04-18 11:51:20,100 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:20,101 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-04-18 11:51:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-04-18 11:51:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 11:51:20,103 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 70552639, now seen corresponding path program 44 times [2020-04-18 11:51:20,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:20,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879376944] [2020-04-18 11:51:20,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879376944] [2020-04-18 11:51:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045907376] [2020-04-18 11:51:20,551 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 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 [2020-04-18 11:51:20,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:20,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:20,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 11:51:20,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:20,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:20,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-04-18 11:51:20,625 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:20,632 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:20,643 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 38 transitions. [2020-04-18 11:51:20,644 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:21,109 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:51:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 11:51:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 11:51:21,110 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 27 states. [2020-04-18 11:51:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:21,423 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-04-18 11:51:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-04-18 11:51:21,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:21,424 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [213487205] [2020-04-18 11:51:21,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:21,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 11:51:21,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [213487205] [2020-04-18 11:51:21,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 11:51:21,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:21,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 11:51:21,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 11:51:21,426 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 27 states. [2020-04-18 11:51:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:21,473 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2020-04-18 11:51:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 11:51:21,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-04-18 11:51:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:21,475 INFO L225 Difference]: With dead ends: 74 [2020-04-18 11:51:21,475 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 11:51:21,475 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 11:51:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 11:51:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-04-18 11:51:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-18 11:51:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2020-04-18 11:51:21,478 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 32 [2020-04-18 11:51:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:21,479 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2020-04-18 11:51:21,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 11:51:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2020-04-18 11:51:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 11:51:21,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:21,479 INFO L425 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:21,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:21,683 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash 731008214, now seen corresponding path program 45 times [2020-04-18 11:51:21,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:21,684 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [351471868] [2020-04-18 11:51:21,685 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:21,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2020-04-18 11:51:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-04-18 11:51:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 11:51:21,687 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 731886614, now seen corresponding path program 46 times [2020-04-18 11:51:21,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:21,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70063226] [2020-04-18 11:51:21,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:22,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70063226] [2020-04-18 11:51:22,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900837369] [2020-04-18 11:51:22,018 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 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 [2020-04-18 11:51:22,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:22,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:22,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-18 11:51:22,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:22,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:22,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-04-18 11:51:22,108 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:22,113 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:22,122 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2020-04-18 11:51:22,122 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:22,442 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:51:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:51:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:51:22,443 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 28 states. [2020-04-18 11:51:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:22,798 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-04-18 11:51:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-04-18 11:51:22,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:22,798 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [351471868] [2020-04-18 11:51:22,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:22,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-04-18 11:51:22,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [351471868] [2020-04-18 11:51:22,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:51:22,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:51:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:51:22,800 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand 28 states. [2020-04-18 11:51:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:22,848 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2020-04-18 11:51:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 11:51:22,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-04-18 11:51:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:22,849 INFO L225 Difference]: With dead ends: 75 [2020-04-18 11:51:22,849 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:51:22,849 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:51:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:51:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-04-18 11:51:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-18 11:51:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 129 transitions. [2020-04-18 11:51:22,852 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 129 transitions. Word has length 33 [2020-04-18 11:51:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:22,853 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 129 transitions. [2020-04-18 11:51:22,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:51:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 129 transitions. [2020-04-18 11:51:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 11:51:22,853 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:22,853 INFO L425 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:23,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:23,060 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash -242475041, now seen corresponding path program 47 times [2020-04-18 11:51:23,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:23,061 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1462849030] [2020-04-18 11:51:23,062 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:23,063 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-04-18 11:51:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-04-18 11:51:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 11:51:23,064 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -241596641, now seen corresponding path program 48 times [2020-04-18 11:51:23,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:23,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447913238] [2020-04-18 11:51:23,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:23,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447913238] [2020-04-18 11:51:23,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386119519] [2020-04-18 11:51:23,428 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 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 [2020-04-18 11:51:23,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:23,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:23,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:51:23,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:23,488 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 97 treesize of output 93 [2020-04-18 11:51:23,489 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,524 INFO L619 ElimStorePlain]: treesize reduction 64, result has 20.0 percent of original size [2020-04-18 11:51:23,524 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,525 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:51:23,566 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:51:23,566 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,575 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:23,575 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,576 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:51:23,605 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:51:23,605 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,613 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:23,614 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:51:23,614 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:51:23,681 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:51:23,681 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,686 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:23,687 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:23,687 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:51:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-04-18 11:51:23,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:23,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [27] total 33 [2020-04-18 11:51:23,715 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:23,721 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:23,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 40 transitions. [2020-04-18 11:51:23,731 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:24,222 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:51:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 11:51:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=729, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 11:51:24,223 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 34 states. [2020-04-18 11:51:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:25,514 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-04-18 11:51:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-04-18 11:51:25,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:25,515 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1462849030] [2020-04-18 11:51:25,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:25,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:51:25,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1462849030] [2020-04-18 11:51:25,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-18 11:51:25,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 11:51:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=2367, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:51:25,520 INFO L87 Difference]: Start difference. First operand 75 states and 129 transitions. Second operand 34 states. [2020-04-18 11:51:29,737 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:51:33,812 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:51:37,709 WARN L192 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:51:44,552 WARN L192 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 11:51:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:55,413 INFO L93 Difference]: Finished difference Result 129 states and 239 transitions. [2020-04-18 11:51:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 11:51:55,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2020-04-18 11:51:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:55,415 INFO L225 Difference]: With dead ends: 129 [2020-04-18 11:51:55,415 INFO L226 Difference]: Without dead ends: 129 [2020-04-18 11:51:55,416 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=2011, Invalid=3387, Unknown=4, NotChecked=0, Total=5402 [2020-04-18 11:51:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-18 11:51:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2020-04-18 11:51:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-18 11:51:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 130 transitions. [2020-04-18 11:51:55,419 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 130 transitions. Word has length 34 [2020-04-18 11:51:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:55,419 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 130 transitions. [2020-04-18 11:51:55,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-18 11:51:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 130 transitions. [2020-04-18 11:51:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 11:51:55,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:55,420 INFO L425 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:55,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:55,627 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash -355684874, now seen corresponding path program 49 times [2020-04-18 11:51:55,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:55,628 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [485060818] [2020-04-18 11:51:55,628 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:55,629 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 43 transitions. [2020-04-18 11:51:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-04-18 11:51:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 11:51:55,630 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -354806474, now seen corresponding path program 50 times [2020-04-18 11:51:55,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:55,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761476871] [2020-04-18 11:51:55,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:56,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761476871] [2020-04-18 11:51:56,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011373995] [2020-04-18 11:51:56,027 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 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 [2020-04-18 11:51:56,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:56,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:56,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-18 11:51:56,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:56,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:56,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-04-18 11:51:56,102 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:56,110 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:56,122 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2020-04-18 11:51:56,122 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:56,478 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:51:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 11:51:56,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:51:56,479 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 30 states. [2020-04-18 11:51:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:56,917 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-04-18 11:51:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-04-18 11:51:56,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:56,918 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [485060818] [2020-04-18 11:51:56,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:56,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-04-18 11:51:56,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [485060818] [2020-04-18 11:51:56,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-18 11:51:56,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 11:51:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:51:56,920 INFO L87 Difference]: Start difference. First operand 76 states and 130 transitions. Second operand 30 states. [2020-04-18 11:51:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:56,974 INFO L93 Difference]: Finished difference Result 77 states and 131 transitions. [2020-04-18 11:51:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 11:51:56,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-04-18 11:51:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:56,976 INFO L225 Difference]: With dead ends: 77 [2020-04-18 11:51:56,976 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:51:56,976 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:51:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:51:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-04-18 11:51:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-18 11:51:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 131 transitions. [2020-04-18 11:51:56,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 131 transitions. Word has length 35 [2020-04-18 11:51:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:56,981 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 131 transitions. [2020-04-18 11:51:56,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-18 11:51:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 131 transitions. [2020-04-18 11:51:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 11:51:56,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:56,982 INFO L425 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:57,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:57,185 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash 429777599, now seen corresponding path program 51 times [2020-04-18 11:51:57,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:57,185 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1803092453] [2020-04-18 11:51:57,186 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:57,187 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-04-18 11:51:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-04-18 11:51:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 11:51:57,187 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash 430655999, now seen corresponding path program 52 times [2020-04-18 11:51:57,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:57,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583675381] [2020-04-18 11:51:57,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:57,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583675381] [2020-04-18 11:51:57,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486726717] [2020-04-18 11:51:57,600 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 [2020-04-18 11:51:57,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:57,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:57,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-18 11:51:57,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:57,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:57,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-04-18 11:51:57,695 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:57,703 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:57,719 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 42 transitions. [2020-04-18 11:51:57,719 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:58,064 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:51:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:51:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:51:58,065 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 31 states. [2020-04-18 11:51:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:58,519 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-04-18 11:51:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-04-18 11:51:58,519 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:58,519 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1803092453] [2020-04-18 11:51:58,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:58,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-04-18 11:51:58,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1803092453] [2020-04-18 11:51:58,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 11:51:58,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:51:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:51:58,521 INFO L87 Difference]: Start difference. First operand 77 states and 131 transitions. Second operand 31 states. [2020-04-18 11:51:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:58,572 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2020-04-18 11:51:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 11:51:58,578 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2020-04-18 11:51:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:51:58,579 INFO L225 Difference]: With dead ends: 78 [2020-04-18 11:51:58,579 INFO L226 Difference]: Without dead ends: 78 [2020-04-18 11:51:58,580 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:51:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-18 11:51:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-04-18 11:51:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 11:51:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 132 transitions. [2020-04-18 11:51:58,582 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 132 transitions. Word has length 36 [2020-04-18 11:51:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:51:58,582 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 132 transitions. [2020-04-18 11:51:58,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 11:51:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 132 transitions. [2020-04-18 11:51:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 11:51:58,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:51:58,583 INFO L425 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:58,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:58,786 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 11:51:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -990689514, now seen corresponding path program 53 times [2020-04-18 11:51:58,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:58,788 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [433052360] [2020-04-18 11:51:58,789 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:58,790 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 45 transitions. [2020-04-18 11:51:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-04-18 11:51:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 11:51:58,791 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash -989811114, now seen corresponding path program 54 times [2020-04-18 11:51:58,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:58,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168585590] [2020-04-18 11:51:58,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:51:59,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168585590] [2020-04-18 11:51:59,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490970506] [2020-04-18 11:51:59,249 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 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 [2020-04-18 11:51:59,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:59,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:59,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:51:59,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:59,315 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 37 [2020-04-18 11:51:59,315 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 11:51:59,343 INFO L619 ElimStorePlain]: treesize reduction 22, result has 42.1 percent of original size [2020-04-18 11:51:59,343 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,344 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2020-04-18 11:51:59,390 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-04-18 11:51:59,391 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,399 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:59,400 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,400 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 11:51:59,444 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 11:51:59,444 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,453 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:59,454 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 11:51:59,455 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 11:51:59,529 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 11:51:59,530 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,536 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 11:51:59,536 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 11:51:59,536 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 11:51:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-04-18 11:51:59,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:59,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [30] total 36 [2020-04-18 11:51:59,568 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:59,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:59,590 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 43 transitions. [2020-04-18 11:51:59,590 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:00,184 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:52:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 11:52:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 11:52:00,185 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 37 states. [2020-04-18 11:52:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:01,733 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-04-18 11:52:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-04-18 11:52:01,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:01,733 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [433052360] [2020-04-18 11:52:01,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:01,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:52:01,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [433052360] [2020-04-18 11:52:01,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 11:52:01,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 11:52:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=2853, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 11:52:01,735 INFO L87 Difference]: Start difference. First operand 78 states and 132 transitions. Second operand 37 states. [2020-04-18 11:52:05,942 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 11:52:10,018 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 11:52:12,945 WARN L192 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 11:52:19,109 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 Received shutdown request... [2020-04-18 11:52:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:52:25,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:25,385 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 11:52:25,391 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 11:52:25,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:52:25 BasicIcfg [2020-04-18 11:52:25,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:52:25,393 INFO L168 Benchmark]: Toolchain (without parser) took 283164.16 ms. Allocated memory was 138.4 MB in the beginning and 428.9 MB in the end (delta: 290.5 MB). Free memory was 99.9 MB in the beginning and 87.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 302.5 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,393 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1022.87 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 98.0 MB in the beginning and 133.5 MB in the end (delta: -35.5 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.51 ms. Allocated memory is still 202.4 MB. Free memory was 133.5 MB in the beginning and 130.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,394 INFO L168 Benchmark]: Boogie Preprocessor took 44.22 ms. Allocated memory is still 202.4 MB. Free memory was 130.8 MB in the beginning and 128.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,394 INFO L168 Benchmark]: RCFGBuilder took 616.48 ms. Allocated memory is still 202.4 MB. Free memory was 128.7 MB in the beginning and 101.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,395 INFO L168 Benchmark]: TraceAbstraction took 281390.19 ms. Allocated memory was 202.4 MB in the beginning and 428.9 MB in the end (delta: 226.5 MB). Free memory was 100.5 MB in the beginning and 87.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 239.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:25,397 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1022.87 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 98.0 MB in the beginning and 133.5 MB in the end (delta: -35.5 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.51 ms. Allocated memory is still 202.4 MB. Free memory was 133.5 MB in the beginning and 130.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.22 ms. Allocated memory is still 202.4 MB. Free memory was 130.8 MB in the beginning and 128.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 616.48 ms. Allocated memory is still 202.4 MB. Free memory was 128.7 MB in the beginning and 101.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 281390.19 ms. Allocated memory was 202.4 MB in the beginning and 428.9 MB in the end (delta: 226.5 MB). Free memory was 100.5 MB in the beginning and 87.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 239.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 94 ProgramPointsBefore, 21 ProgramPointsAfterwards, 105 TransitionsBefore, 25 TransitionsAfterwards, 2652 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 57 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 11 ConcurrentYvCompositions, 7 ChoiceCompositions, 1310 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2011 CheckedPairsTotal, 90 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1010]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1010). Cancelled while BasicCegarLoop was constructing difference of abstraction (78states) and FLOYD_HOARE automaton (currently 44 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (51 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 281.2s, OverallIterations: 29, TraceHistogramMax: 28, AutomataDifference: 244.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 322 SDtfs, 2851 SDslu, 671 SDs, 0 SdLazy, 1783 SolverSat, 911 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 81.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1689 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 789 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4769 ImplicationChecksByTransitivity, 172.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 493 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown