/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:37:48,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:37:48,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:37:48,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 21:37:48,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:37:48,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:37:48,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:37:48,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:37:48,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:37:48,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:37:48,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:37:48,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:37:48,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:37:48,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:37:48,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:37:48,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:37:48,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:37:48,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:37:48,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:37:48,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:37:48,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:37:48,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:37:48,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:37:48,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:37:48,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:37:48,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:37:48,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:37:48,747 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:37:48,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:37:48,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:37:48,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:37:48,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:37:48,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:37:48,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:37:48,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:37:48,749 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:37:48,749 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:37:48,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:37:48,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:37:48,750 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:37:48,750 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:37:48,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:37:48,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:37:48,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:37:48,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:37:48,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:37:48,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:37:48,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:37:48,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:37:48,753 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:37:48,753 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:37:48,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:37:48,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:37:48,753 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:37:49,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:37:49,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:37:49,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:37:49,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:37:49,204 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:37:49,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2021-10-13 21:37:49,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0d2a7866/545056b9b5a04465a03092f05b28350c/FLAGd6fbdd88b [2021-10-13 21:37:49,991 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:37:49,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2021-10-13 21:37:50,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0d2a7866/545056b9b5a04465a03092f05b28350c/FLAGd6fbdd88b [2021-10-13 21:37:50,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0d2a7866/545056b9b5a04465a03092f05b28350c [2021-10-13 21:37:50,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:37:50,318 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:37:50,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:37:50,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:37:50,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:37:50,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45bfce64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50, skipping insertion in model container [2021-10-13 21:37:50,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:37:50,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:37:50,551 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2021-10-13 21:37:50,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:37:50,581 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:37:50,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:37:50,601 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2021-10-13 21:37:50,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:37:50,616 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:37:50,643 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2021-10-13 21:37:50,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:37:50,674 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:37:50,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50 WrapperNode [2021-10-13 21:37:50,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:37:50,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:37:50,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:37:50,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:37:50,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:37:50,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:37:50,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:37:50,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:37:50,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:37:50,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:37:50,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:37:50,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:37:50,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (1/1) ... [2021-10-13 21:37:50,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:37:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:37:50,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 21:37:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 21:37:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:37:50,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:37:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:37:50,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:37:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:37:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:37:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:37:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:37:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:37:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:37:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:37:50,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:37:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:37:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:37:50,981 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:37:52,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:37:52,187 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-13 21:37:52,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:52 BoogieIcfgContainer [2021-10-13 21:37:52,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:37:52,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:37:52,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:37:52,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:37:52,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:37:50" (1/3) ... [2021-10-13 21:37:52,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13623073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:52, skipping insertion in model container [2021-10-13 21:37:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:50" (2/3) ... [2021-10-13 21:37:52,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13623073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:52, skipping insertion in model container [2021-10-13 21:37:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:52" (3/3) ... [2021-10-13 21:37:52,199 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2021-10-13 21:37:52,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:37:52,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-13 21:37:52,206 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:37:52,238 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,238 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,239 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,239 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,239 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,239 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,240 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,240 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,240 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,240 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,240 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,241 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,241 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,242 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,242 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,243 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,244 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,245 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,246 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,246 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,246 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,246 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,246 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,247 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,247 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,247 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,247 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,248 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,249 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,249 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,249 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,249 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,250 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,251 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,256 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,257 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,257 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,257 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,258 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,258 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,258 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,261 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,261 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,262 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,263 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:52,268 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 21:37:52,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:37:52,329 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 21:37:52,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-13 21:37:52,347 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:37:52,360 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 120 transitions, 256 flow [2021-10-13 21:37:52,364 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 120 transitions, 256 flow [2021-10-13 21:37:52,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2021-10-13 21:37:52,419 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2021-10-13 21:37:52,420 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 21:37:52,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2021-10-13 21:37:52,428 INFO L116 LiptonReduction]: Number of co-enabled transitions 660 [2021-10-13 21:38:08,590 INFO L131 LiptonReduction]: Checked pairs total: 973 [2021-10-13 21:38:08,591 INFO L133 LiptonReduction]: Total number of compositions: 135 [2021-10-13 21:38:08,606 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2021-10-13 21:38:08,634 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:38:08,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:08,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:38:08,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash 17761, now seen corresponding path program 1 times [2021-10-13 21:38:08,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:08,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417448738] [2021-10-13 21:38:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:08,668 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:08,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:38:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:38:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:09,011 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:38:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:38:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:09,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:09,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:09,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417448738] [2021-10-13 21:38:09,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417448738] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:09,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:09,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:38:09,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789602322] [2021-10-13 21:38:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:38:09,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:38:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:38:09,621 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:09,743 INFO L93 Difference]: Finished difference Result 104 states and 249 transitions. [2021-10-13 21:38:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:38:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:38:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:09,763 INFO L225 Difference]: With dead ends: 104 [2021-10-13 21:38:09,763 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 21:38:09,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:38:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 21:38:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-13 21:38:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 4.016129032258065) internal successors, (249), 103 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 249 transitions. [2021-10-13 21:38:09,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 249 transitions. Word has length 2 [2021-10-13 21:38:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 249 transitions. [2021-10-13 21:38:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 249 transitions. [2021-10-13 21:38:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:38:09,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:09,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:38:09,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:10,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:10,037 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 17839, now seen corresponding path program 1 times [2021-10-13 21:38:10,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:10,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178530782] [2021-10-13 21:38:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:10,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:10,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:10,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:38:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:38:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:10,332 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-13 21:38:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2021-10-13 21:38:10,345 INFO L388 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 178 treesize of output 176 [2021-10-13 21:38:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:10,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:10,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:10,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178530782] [2021-10-13 21:38:10,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178530782] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:10,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:10,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:38:10,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012773098] [2021-10-13 21:38:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:38:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:38:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:10,806 INFO L87 Difference]: Start difference. First operand 104 states and 249 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:10,935 INFO L93 Difference]: Finished difference Result 87 states and 200 transitions. [2021-10-13 21:38:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:38:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:38:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:10,938 INFO L225 Difference]: With dead ends: 87 [2021-10-13 21:38:10,938 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 21:38:10,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 21:38:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-13 21:38:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 86 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 200 transitions. [2021-10-13 21:38:10,951 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 200 transitions. Word has length 2 [2021-10-13 21:38:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 200 transitions. [2021-10-13 21:38:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 200 transitions. [2021-10-13 21:38:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:38:10,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:10,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:38:10,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 21:38:11,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:11,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:11,168 INFO L82 PathProgramCache]: Analyzing trace with hash 17760, now seen corresponding path program 1 times [2021-10-13 21:38:11,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:11,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861729152] [2021-10-13 21:38:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:11,169 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:11,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:11,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:11,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:38:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:11,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:38:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:11,475 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:11,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:11,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:11,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861729152] [2021-10-13 21:38:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861729152] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:11,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:11,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:38:11,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203127812] [2021-10-13 21:38:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:38:11,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:38:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:11,673 INFO L87 Difference]: Start difference. First operand 87 states and 200 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:12,002 INFO L93 Difference]: Finished difference Result 173 states and 401 transitions. [2021-10-13 21:38:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:38:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:38:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:12,007 INFO L225 Difference]: With dead ends: 173 [2021-10-13 21:38:12,007 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 21:38:12,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 21:38:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 89. [2021-10-13 21:38:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 3.6140350877192984) internal successors, (206), 88 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 206 transitions. [2021-10-13 21:38:12,029 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 206 transitions. Word has length 2 [2021-10-13 21:38:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:12,029 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 206 transitions. [2021-10-13 21:38:12,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 206 transitions. [2021-10-13 21:38:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:38:12,030 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:12,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:38:12,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:12,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:12,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash 17840, now seen corresponding path program 1 times [2021-10-13 21:38:12,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:12,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188529474] [2021-10-13 21:38:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:12,246 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:12,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:38:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:38:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:12,472 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:38:12,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 261 [2021-10-13 21:38:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:14,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:14,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:14,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188529474] [2021-10-13 21:38:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188529474] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:14,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:14,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:38:14,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442465674] [2021-10-13 21:38:14,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:38:14,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:38:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:14,020 INFO L87 Difference]: Start difference. First operand 89 states and 206 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:14,104 INFO L93 Difference]: Finished difference Result 72 states and 155 transitions. [2021-10-13 21:38:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:38:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:38:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:14,106 INFO L225 Difference]: With dead ends: 72 [2021-10-13 21:38:14,106 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 21:38:14,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 21:38:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 21:38:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 3.1) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-10-13 21:38:14,113 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 2 [2021-10-13 21:38:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-10-13 21:38:14,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-10-13 21:38:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:38:14,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:14,114 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:38:14,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:14,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:14,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash 17142656, now seen corresponding path program 1 times [2021-10-13 21:38:14,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:14,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887258982] [2021-10-13 21:38:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:14,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:14,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:14,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:14,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:38:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:38:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:14,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:14,584 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:14,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:15,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:15,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887258982] [2021-10-13 21:38:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887258982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:15,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:15,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:38:15,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9670178] [2021-10-13 21:38:15,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:38:15,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:38:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:38:15,290 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:16,660 INFO L93 Difference]: Finished difference Result 411 states and 898 transitions. [2021-10-13 21:38:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:38:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:38:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:16,665 INFO L225 Difference]: With dead ends: 411 [2021-10-13 21:38:16,666 INFO L226 Difference]: Without dead ends: 411 [2021-10-13 21:38:16,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 858.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:38:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-10-13 21:38:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 76. [2021-10-13 21:38:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 3.0185185185185186) internal successors, (163), 75 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 163 transitions. [2021-10-13 21:38:16,677 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 163 transitions. Word has length 4 [2021-10-13 21:38:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:16,678 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 163 transitions. [2021-10-13 21:38:16,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 163 transitions. [2021-10-13 21:38:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:38:16,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:16,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:38:16,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:16,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:16,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash 17154876, now seen corresponding path program 1 times [2021-10-13 21:38:16,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:16,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474298008] [2021-10-13 21:38:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:16,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:16,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:16,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:38:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:16,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:38:16,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:17,122 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:38:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:38:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:17,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:17,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:17,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474298008] [2021-10-13 21:38:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474298008] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:17,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:38:17,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639713496] [2021-10-13 21:38:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:38:17,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:38:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:38:17,522 INFO L87 Difference]: Start difference. First operand 76 states and 163 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:17,584 INFO L93 Difference]: Finished difference Result 68 states and 147 transitions. [2021-10-13 21:38:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:38:17,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:38:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:17,589 INFO L225 Difference]: With dead ends: 68 [2021-10-13 21:38:17,589 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 21:38:17,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:38:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 21:38:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-13 21:38:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 2.826923076923077) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 147 transitions. [2021-10-13 21:38:17,599 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 147 transitions. Word has length 4 [2021-10-13 21:38:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 147 transitions. [2021-10-13 21:38:17,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 147 transitions. [2021-10-13 21:38:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:38:17,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:17,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:38:17,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:17,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:17,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 17154829, now seen corresponding path program 1 times [2021-10-13 21:38:17,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:17,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564040446] [2021-10-13 21:38:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:17,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:17,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:17,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:38:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:38:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:18,012 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:38:18,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:38:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:18,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:18,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:18,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564040446] [2021-10-13 21:38:18,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564040446] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:18,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:18,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:38:18,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567723600] [2021-10-13 21:38:18,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:38:18,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:38:18,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:18,427 INFO L87 Difference]: Start difference. First operand 68 states and 147 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:18,523 INFO L93 Difference]: Finished difference Result 48 states and 100 transitions. [2021-10-13 21:38:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:38:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:38:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:18,525 INFO L225 Difference]: With dead ends: 48 [2021-10-13 21:38:18,525 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 21:38:18,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:38:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 21:38:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 21:38:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 100 transitions. [2021-10-13 21:38:18,537 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 100 transitions. Word has length 4 [2021-10-13 21:38:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:18,537 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 100 transitions. [2021-10-13 21:38:18,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 100 transitions. [2021-10-13 21:38:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:38:18,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:18,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:38:18,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:18,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:18,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash 17154877, now seen corresponding path program 1 times [2021-10-13 21:38:18,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:18,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082852061] [2021-10-13 21:38:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:18,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:18,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:18,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:38:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:38:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:18,995 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-13 21:38:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 68 [2021-10-13 21:38:19,003 INFO L388 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 95 treesize of output 93 [2021-10-13 21:38:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:21,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:21,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082852061] [2021-10-13 21:38:21,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082852061] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:21,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:21,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:38:21,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641941062] [2021-10-13 21:38:21,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:38:21,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:38:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:21,499 INFO L87 Difference]: Start difference. First operand 48 states and 100 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:21,573 INFO L93 Difference]: Finished difference Result 42 states and 88 transitions. [2021-10-13 21:38:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:38:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:38:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:21,575 INFO L225 Difference]: With dead ends: 42 [2021-10-13 21:38:21,575 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 21:38:21,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2035.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:38:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 21:38:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 21:38:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-13 21:38:21,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 4 [2021-10-13 21:38:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:21,578 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-13 21:38:21,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-13 21:38:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:38:21,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:21,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:38:21,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:21,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:21,788 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash 17154830, now seen corresponding path program 1 times [2021-10-13 21:38:21,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:21,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138822950] [2021-10-13 21:38:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:21,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:21,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:21,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:38:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:38:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:22,066 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:22,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:22,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:22,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138822950] [2021-10-13 21:38:22,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138822950] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:22,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:22,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:38:22,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888024016] [2021-10-13 21:38:22,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:38:22,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:38:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:38:22,661 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:27,310 INFO L93 Difference]: Finished difference Result 84 states and 172 transitions. [2021-10-13 21:38:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:38:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:38:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:27,314 INFO L225 Difference]: With dead ends: 84 [2021-10-13 21:38:27,314 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 21:38:27,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:38:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 21:38:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-10-13 21:38:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 2.491228070175439) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 142 transitions. [2021-10-13 21:38:27,320 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 142 transitions. Word has length 4 [2021-10-13 21:38:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:27,320 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 142 transitions. [2021-10-13 21:38:27,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 142 transitions. [2021-10-13 21:38:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:38:27,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:27,322 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-13 21:38:27,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:27,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:27,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -694065042, now seen corresponding path program 1 times [2021-10-13 21:38:27,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:27,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310389744] [2021-10-13 21:38:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:27,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:27,538 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:27,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:38:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:27,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:38:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:27,814 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:28,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:28,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:28,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310389744] [2021-10-13 21:38:28,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310389744] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:28,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:28,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:38:28,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001289520] [2021-10-13 21:38:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:38:28,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:38:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:38:28,917 INFO L87 Difference]: Start difference. First operand 62 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:34,637 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-10-13 21:38:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:38:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:38:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:34,641 INFO L225 Difference]: With dead ends: 148 [2021-10-13 21:38:34,642 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 21:38:34,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1071.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:38:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 21:38:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 82. [2021-10-13 21:38:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 2.5454545454545454) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 196 transitions. [2021-10-13 21:38:34,648 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 196 transitions. Word has length 6 [2021-10-13 21:38:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 196 transitions. [2021-10-13 21:38:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 196 transitions. [2021-10-13 21:38:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:38:34,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:34,650 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:38:34,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:34,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:34,862 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash 425793472, now seen corresponding path program 2 times [2021-10-13 21:38:34,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:34,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690548015] [2021-10-13 21:38:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:38:34,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:34,865 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:34,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:38:34,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:38:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:38:34,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:38:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:35,178 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:35,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:35,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:38,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:38,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690548015] [2021-10-13 21:38:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690548015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:38,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:38:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726026672] [2021-10-13 21:38:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:38:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:38:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:38:38,040 INFO L87 Difference]: Start difference. First operand 82 states and 196 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:45,179 INFO L93 Difference]: Finished difference Result 733 states and 1724 transitions. [2021-10-13 21:38:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:38:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:38:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:45,188 INFO L225 Difference]: With dead ends: 733 [2021-10-13 21:38:45,188 INFO L226 Difference]: Without dead ends: 733 [2021-10-13 21:38:45,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6556.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:38:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-10-13 21:38:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 90. [2021-10-13 21:38:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 212 transitions. [2021-10-13 21:38:45,202 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 212 transitions. Word has length 8 [2021-10-13 21:38:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:45,202 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 212 transitions. [2021-10-13 21:38:45,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 212 transitions. [2021-10-13 21:38:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:38:45,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:45,203 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-13 21:38:45,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:45,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:38:45,417 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:38:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash 437429902, now seen corresponding path program 1 times [2021-10-13 21:38:45,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:45,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079888383] [2021-10-13 21:38:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:45,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:45,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:38:45,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:38:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:38:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:45,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:45,704 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:38:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:38:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:38:45,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:38:47,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:47,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079888383] [2021-10-13 21:38:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079888383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:47,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:47,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:38:47,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329253543] [2021-10-13 21:38:47,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:38:47,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:38:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:38:47,267 INFO L87 Difference]: Start difference. First operand 90 states and 212 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:10,439 INFO L93 Difference]: Finished difference Result 222 states and 484 transitions. [2021-10-13 21:39:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:39:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:39:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:10,442 INFO L225 Difference]: With dead ends: 222 [2021-10-13 21:39:10,442 INFO L226 Difference]: Without dead ends: 222 [2021-10-13 21:39:10,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2654.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:39:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-13 21:39:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 111. [2021-10-13 21:39:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 2.6226415094339623) internal successors, (278), 110 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 278 transitions. [2021-10-13 21:39:10,449 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 278 transitions. Word has length 8 [2021-10-13 21:39:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:10,450 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 278 transitions. [2021-10-13 21:39:10,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 278 transitions. [2021-10-13 21:39:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:39:10,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:10,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:10,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:10,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:10,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1344309230, now seen corresponding path program 1 times [2021-10-13 21:39:10,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:10,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106085922] [2021-10-13 21:39:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:10,657 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:10,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:10,659 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:10,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:39:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:39:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:10,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:10,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106085922] [2021-10-13 21:39:10,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106085922] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:10,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:10,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-13 21:39:10,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751682955] [2021-10-13 21:39:10,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:39:10,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:39:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:39:10,880 INFO L87 Difference]: Start difference. First operand 111 states and 278 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:10,961 INFO L93 Difference]: Finished difference Result 171 states and 415 transitions. [2021-10-13 21:39:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:39:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:39:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:10,964 INFO L225 Difference]: With dead ends: 171 [2021-10-13 21:39:10,965 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 21:39:10,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:39:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 21:39:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-10-13 21:39:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 2.78125) internal successors, (356), 132 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 356 transitions. [2021-10-13 21:39:10,973 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 356 transitions. Word has length 9 [2021-10-13 21:39:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 356 transitions. [2021-10-13 21:39:10,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 356 transitions. [2021-10-13 21:39:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:39:10,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:10,975 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:11,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:11,181 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1277863902, now seen corresponding path program 1 times [2021-10-13 21:39:11,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:11,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957663738] [2021-10-13 21:39:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:11,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:11,190 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:11,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:39:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:39:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:11,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:11,752 INFO L388 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 38 treesize of output 34 [2021-10-13 21:39:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:12,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:12,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957663738] [2021-10-13 21:39:12,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957663738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:12,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:12,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:39:12,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102889711] [2021-10-13 21:39:12,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:39:12,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:39:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:39:12,468 INFO L87 Difference]: Start difference. First operand 133 states and 356 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:14,854 INFO L93 Difference]: Finished difference Result 245 states and 555 transitions. [2021-10-13 21:39:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:39:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:39:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:14,857 INFO L225 Difference]: With dead ends: 245 [2021-10-13 21:39:14,858 INFO L226 Difference]: Without dead ends: 245 [2021-10-13 21:39:14,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1697.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:39:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-13 21:39:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 143. [2021-10-13 21:39:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 2.9057971014492754) internal successors, (401), 142 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 401 transitions. [2021-10-13 21:39:14,868 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 401 transitions. Word has length 10 [2021-10-13 21:39:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:14,869 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 401 transitions. [2021-10-13 21:39:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 401 transitions. [2021-10-13 21:39:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:39:14,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:14,872 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:14,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:15,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 959075689, now seen corresponding path program 1 times [2021-10-13 21:39:15,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:15,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757825441] [2021-10-13 21:39:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:15,082 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:15,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:15,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:39:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:39:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:15,455 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:39:15,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:39:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:15,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:39:17,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:17,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757825441] [2021-10-13 21:39:17,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757825441] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:17,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:17,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 21:39:17,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098381538] [2021-10-13 21:39:17,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:39:17,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:17,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:39:17,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:39:17,361 INFO L87 Difference]: Start difference. First operand 143 states and 401 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:29,176 INFO L93 Difference]: Finished difference Result 260 states and 628 transitions. [2021-10-13 21:39:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:39:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:39:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:29,180 INFO L225 Difference]: With dead ends: 260 [2021-10-13 21:39:29,180 INFO L226 Difference]: Without dead ends: 260 [2021-10-13 21:39:29,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3055.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:39:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-13 21:39:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 166. [2021-10-13 21:39:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 2.987577639751553) internal successors, (481), 165 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 481 transitions. [2021-10-13 21:39:29,189 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 481 transitions. Word has length 11 [2021-10-13 21:39:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 481 transitions. [2021-10-13 21:39:29,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 481 transitions. [2021-10-13 21:39:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:39:29,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:29,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:29,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:29,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:29,403 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 903990208, now seen corresponding path program 2 times [2021-10-13 21:39:29,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:29,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501506507] [2021-10-13 21:39:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:39:29,406 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:29,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:39:29,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:39:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:39:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:39:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:29,756 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:39:29,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:39:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 21:39:29,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 21:39:34,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:34,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501506507] [2021-10-13 21:39:34,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501506507] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:39:34,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:39:34,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:39:34,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650516912] [2021-10-13 21:39:34,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:39:34,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:39:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-10-13 21:39:34,521 INFO L87 Difference]: Start difference. First operand 166 states and 481 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:34,919 INFO L93 Difference]: Finished difference Result 142 states and 407 transitions. [2021-10-13 21:39:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:39:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:39:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:34,922 INFO L225 Difference]: With dead ends: 142 [2021-10-13 21:39:34,922 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 21:39:34,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2622.7ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-13 21:39:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 21:39:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 74. [2021-10-13 21:39:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 2.2777777777777777) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-13 21:39:34,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 11 [2021-10-13 21:39:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:34,927 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-13 21:39:34,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-13 21:39:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:39:34,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:34,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:34,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:35,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 817817824, now seen corresponding path program 1 times [2021-10-13 21:39:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:35,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047692744] [2021-10-13 21:39:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:35,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:35,146 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:35,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:39:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:39:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:39:35,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:39:35,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:35,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047692744] [2021-10-13 21:39:35,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047692744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:39:35,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:39:35,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:39:35,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012928754] [2021-10-13 21:39:35,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:39:35,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:39:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:39:35,681 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:35,713 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2021-10-13 21:39:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:39:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:39:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:35,715 INFO L225 Difference]: With dead ends: 99 [2021-10-13 21:39:35,715 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 21:39:35,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:39:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 21:39:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-13 21:39:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 2.1866666666666665) internal successors, (164), 76 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 164 transitions. [2021-10-13 21:39:35,720 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 164 transitions. Word has length 12 [2021-10-13 21:39:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:35,720 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 164 transitions. [2021-10-13 21:39:35,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 164 transitions. [2021-10-13 21:39:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:39:35,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:35,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:35,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:35,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:35,922 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1170720396, now seen corresponding path program 1 times [2021-10-13 21:39:35,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:35,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620653878] [2021-10-13 21:39:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:35,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:35,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:35,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:39:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:39:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:37,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 21:39:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 19 [2021-10-13 21:39:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:37,985 INFO L354 Elim1Store]: treesize reduction 570, result has 0.9 percent of original size [2021-10-13 21:39:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2021-10-13 21:39:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:38,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:38,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620653878] [2021-10-13 21:39:38,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620653878] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:38,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:38,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-13 21:39:38,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251762192] [2021-10-13 21:39:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:39:38,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:39:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:39:38,208 INFO L87 Difference]: Start difference. First operand 77 states and 164 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:39,233 INFO L93 Difference]: Finished difference Result 121 states and 270 transitions. [2021-10-13 21:39:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:39:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 21:39:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:39,236 INFO L225 Difference]: With dead ends: 121 [2021-10-13 21:39:39,236 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 21:39:39,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1201.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:39:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 21:39:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-10-13 21:39:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 92 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 196 transitions. [2021-10-13 21:39:39,241 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 196 transitions. Word has length 15 [2021-10-13 21:39:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:39,241 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 196 transitions. [2021-10-13 21:39:39,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 196 transitions. [2021-10-13 21:39:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:39:39,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:39,243 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:39,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:39,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:39:39,454 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:39:39,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:39,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1035414710, now seen corresponding path program 2 times [2021-10-13 21:39:39,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:39,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143910081] [2021-10-13 21:39:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:39:39,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:39,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:39:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:39:39,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:39:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:39:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:39:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:39,758 INFO L388 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 50 treesize of output 48 [2021-10-13 21:39:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:39:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:39:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:40,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:39:40,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:39:41,184 INFO L354 Elim1Store]: treesize reduction 87, result has 35.6 percent of original size [2021-10-13 21:39:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 93 [2021-10-13 21:39:46,530 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 21:39:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 39 [2021-10-13 21:39:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:46,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:51,283 INFO L354 Elim1Store]: treesize reduction 534, result has 7.1 percent of original size [2021-10-13 21:39:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 25060831259 treesize of output 23886426132 Received shutdown request... [2021-10-13 21:52:19,697 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:52:19,705 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:52:19,705 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:52:19,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 21:52:19,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:52:19,912 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. [2021-10-13 21:52:19,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:52:19,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:52:19,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:52:19,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:52:19,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:52:19,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:52:19,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:52:19,917 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:52:19,918 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:52:19,918 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:52:19,918 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:52:19,918 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:52:19,918 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:52:19,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:52:19,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:52:19,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:52:19,928 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:52:19,928 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:52:19,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:52:19 BasicIcfg [2021-10-13 21:52:19,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:52:19,931 INFO L168 Benchmark]: Toolchain (without parser) took 869618.43 ms. Allocated memory was 153.1 MB in the beginning and 612.4 MB in the end (delta: 459.3 MB). Free memory was 128.2 MB in the beginning and 562.9 MB in the end (delta: -434.7 MB). Peak memory consumption was 378.4 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,932 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:52:19,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.31 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 115.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.15 ms. Allocated memory is still 153.1 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,933 INFO L168 Benchmark]: Boogie Preprocessor took 64.25 ms. Allocated memory is still 153.1 MB. Free memory was 113.6 MB in the beginning and 112.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,933 INFO L168 Benchmark]: RCFGBuilder took 1342.30 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 117.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,934 INFO L168 Benchmark]: TraceAbstraction took 867738.71 ms. Allocated memory was 153.1 MB in the beginning and 612.4 MB in the end (delta: 459.3 MB). Free memory was 116.9 MB in the beginning and 562.9 MB in the end (delta: -446.0 MB). Peak memory consumption was 367.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:52:19,936 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.31 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 115.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 102.15 ms. Allocated memory is still 153.1 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.25 ms. Allocated memory is still 153.1 MB. Free memory was 113.6 MB in the beginning and 112.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1342.30 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 117.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 867738.71 ms. Allocated memory was 153.1 MB in the beginning and 612.4 MB in the end (delta: 459.3 MB). Free memory was 116.9 MB in the beginning and 562.9 MB in the end (delta: -446.0 MB). Peak memory consumption was 367.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16228.1ms, 118 PlacesBefore, 37 PlacesAfterwards, 120 TransitionsBefore, 33 TransitionsAfterwards, 660 CoEnabledTransitionPairs, 7 FixpointIterations, 81 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 7 ConcurrentYvCompositions, 6 ChoiceCompositions, 135 TotalNumberOfCompositions, 973 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 923, positive: 907, positive conditional: 0, positive unconditional: 907, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 418, positive: 414, positive conditional: 0, positive unconditional: 414, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 418, positive: 414, positive conditional: 0, positive unconditional: 414, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 209, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 209, negative conditional: 0, negative unconditional: 209, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 923, positive: 493, positive conditional: 0, positive unconditional: 493, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 418, unknown conditional: 0, unknown unconditional: 418] , Statistics on independence cache: Total cache size (in pairs): 41, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 132 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 867604.3ms, OverallIterations: 19, TraceHistogramMax: 6, EmptinessCheckTime: 28.2ms, AutomataDifference: 58814.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16304.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 331 SDtfs, 2114 SDslu, 938 SDs, 0 SdLazy, 1352 SolverSat, 88 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 46514.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 22519.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=15, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.2ms AutomataMinimizationTime, 18 MinimizatonAttempts, 1575 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 174.1ms SsaConstructionTime, 720.4ms SatisfiabilityAnalysisTime, 26051.0ms InterpolantComputationTime, 118 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 200 ConstructedInterpolants, 26 QuantifiedInterpolants, 4451 SizeOfPredicates, 124 NumberOfNonLiveVariables, 1196 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 36 InterpolantComputations, 20 PerfectInterpolantSequences, 29/108 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown