/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/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:26:28,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:26:28,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:26:28,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:26:28,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:26:28,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:26:28,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:26:28,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:26:28,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:26:28,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:26:28,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:26:28,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:26:28,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:26:28,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:26:28,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:26:28,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:26:28,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:26:28,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:26:28,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:26:28,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:26:28,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:26:28,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:26:28,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:26:28,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:26:28,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:26:28,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:26:28,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:26:28,649 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:26:28,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:26:28,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:26:28,650 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:26:28,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:26:28,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:26:28,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:26:28,651 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:26:28,651 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:26:28,651 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:26:28,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:26:28,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:26:28,652 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:26:28,652 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:26:28,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:26:28,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:26:28,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:26:28,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:26:28,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:26:28,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:26:28,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:26:28,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:26:28,654 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:26:28,654 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:26:28,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:26:28,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:26:28,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:26:29,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:26:29,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:26:29,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:26:29,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:26:29,117 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:26:29,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-07 16:26:29,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8ce8a06/8df3f54530d842f58df99c34f3863d3e/FLAG7dfa26196 [2021-10-07 16:26:29,926 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:26:29,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-07 16:26:29,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8ce8a06/8df3f54530d842f58df99c34f3863d3e/FLAG7dfa26196 [2021-10-07 16:26:30,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8ce8a06/8df3f54530d842f58df99c34f3863d3e [2021-10-07 16:26:30,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:26:30,301 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:26:30,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:26:30,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:26:30,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:26:30,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5555f04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30, skipping insertion in model container [2021-10-07 16:26:30,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:26:30,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:26:30,541 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/popl20-more-sum-array-hom.wvr.c[2306,2319] [2021-10-07 16:26:30,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:30,569 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:26:30,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:26:30,595 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/popl20-more-sum-array-hom.wvr.c[2306,2319] [2021-10-07 16:26:30,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:30,607 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:26:30,670 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/popl20-more-sum-array-hom.wvr.c[2306,2319] [2021-10-07 16:26:30,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:30,706 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:26:30,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30 WrapperNode [2021-10-07 16:26:30,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:26:30,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:26:30,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:26:30,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:26:30,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:26:30,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:26:30,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:26:30,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:26:30,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:26:30,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:26:30,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:26:30,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:26:30,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (1/1) ... [2021-10-07 16:26:30,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:26:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:26:30,915 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) [2021-10-07 16:26:30,926 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 [2021-10-07 16:26:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:26:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:26:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:26:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:26:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:26:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:26:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:26:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:26:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:26:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:26:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:26:31,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:26:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:26:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:26:31,008 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:26:31,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:26:31,841 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:26:31,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:26:31 BoogieIcfgContainer [2021-10-07 16:26:31,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:26:31,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:26:31,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:26:31,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:26:31,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:26:30" (1/3) ... [2021-10-07 16:26:31,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ffa49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:26:31, skipping insertion in model container [2021-10-07 16:26:31,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:30" (2/3) ... [2021-10-07 16:26:31,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ffa49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:26:31, skipping insertion in model container [2021-10-07 16:26:31,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:26:31" (3/3) ... [2021-10-07 16:26:31,860 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2021-10-07 16:26:31,867 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:26:31,867 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-07 16:26:31,868 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:26:31,941 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,941 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,942 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,942 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,942 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,942 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,943 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,943 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,943 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,944 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,944 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,945 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,946 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,948 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,951 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,951 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,952 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,952 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,952 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,953 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,953 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,953 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,955 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,957 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,958 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,958 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,958 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,958 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,958 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,960 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,960 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,960 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,960 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,961 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,961 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,963 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,964 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,964 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,965 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,969 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,969 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,970 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,970 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,970 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,970 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,971 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,971 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,971 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,972 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,972 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,973 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,973 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,973 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,974 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,975 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,975 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,975 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,975 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,975 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,976 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,977 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,981 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,985 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,991 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:31,991 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,001 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,001 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,001 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,001 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,002 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,008 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:32,026 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:26:32,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:26:32,121 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 [2021-10-07 16:26:32,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-07 16:26:32,151 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:26:32,167 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 167 transitions, 358 flow [2021-10-07 16:26:32,175 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 167 transitions, 358 flow [2021-10-07 16:26:32,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 167 transitions, 358 flow [2021-10-07 16:26:32,299 INFO L129 PetriNetUnfolder]: 12/164 cut-off events. [2021-10-07 16:26:32,300 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:26:32,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 164 events. 12/164 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-07 16:26:32,311 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-07 16:26:53,113 INFO L131 LiptonReduction]: Checked pairs total: 3110 [2021-10-07 16:26:53,113 INFO L133 LiptonReduction]: Total number of compositions: 165 [2021-10-07 16:26:53,127 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2021-10-07 16:26:53,192 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:26:53,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:53,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:26:53,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:26:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash 20080, now seen corresponding path program 1 times [2021-10-07 16:26:53,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:53,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395071252] [2021-10-07 16:26:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:53,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:53,232 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) [2021-10-07 16:26:53,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:26:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:26:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:53,943 INFO L354 Elim1Store]: treesize reduction 239, result has 19.3 percent of original size [2021-10-07 16:26:53,945 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 5 case distinctions, treesize of input 48 treesize of output 88 [2021-10-07 16:26:53,965 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 134 treesize of output 130 [2021-10-07 16:27:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:04,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:04,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395071252] [2021-10-07 16:27:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395071252] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:04,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:04,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:04,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838715868] [2021-10-07 16:27:04,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:04,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:04,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:04,104 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 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 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) [2021-10-07 16:27:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:04,470 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2021-10-07 16:27:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:04,473 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 [2021-10-07 16:27:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:04,497 INFO L225 Difference]: With dead ends: 623 [2021-10-07 16:27:04,498 INFO L226 Difference]: Without dead ends: 623 [2021-10-07 16:27:04,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-10-07 16:27:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2021-10-07 16:27:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 518 states have (on average 3.9845559845559846) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2021-10-07 16:27:04,600 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 2 [2021-10-07 16:27:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:04,601 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2021-10-07 16:27:04,601 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) [2021-10-07 16:27:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2021-10-07 16:27:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:27:04,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:04,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:27:04,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:04,815 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 [2021-10-07 16:27:04,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 20081, now seen corresponding path program 1 times [2021-10-07 16:27:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:04,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163246912] [2021-10-07 16:27:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:04,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:04,819 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) [2021-10-07 16:27:04,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:27:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:27:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:05,150 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-07 16:27:05,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 236 treesize of output 271 [2021-10-07 16:27:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:08,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:08,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163246912] [2021-10-07 16:27:08,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163246912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:08,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:08,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193673221] [2021-10-07 16:27:08,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:08,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:08,950 INFO L87 Difference]: Start difference. First operand 623 states and 2064 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) [2021-10-07 16:27:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:09,199 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2021-10-07 16:27:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:09,200 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 [2021-10-07 16:27:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:09,207 INFO L225 Difference]: With dead ends: 497 [2021-10-07 16:27:09,207 INFO L226 Difference]: Without dead ends: 497 [2021-10-07 16:27:09,208 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 [2021-10-07 16:27:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-10-07 16:27:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2021-10-07 16:27:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 420 states have (on average 3.7214285714285715) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2021-10-07 16:27:09,235 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 2 [2021-10-07 16:27:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:09,235 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2021-10-07 16:27:09,236 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) [2021-10-07 16:27:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2021-10-07 16:27:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:27:09,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:09,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:27:09,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:09,450 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 [2021-10-07 16:27:09,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash 20005, now seen corresponding path program 1 times [2021-10-07 16:27:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:09,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459007215] [2021-10-07 16:27:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:09,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:09,454 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) [2021-10-07 16:27:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:27:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:27:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:09,736 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:09,737 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 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:27:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:10,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:10,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:10,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459007215] [2021-10-07 16:27:10,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459007215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:10,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:10,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:27:10,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612586386] [2021-10-07 16:27:10,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:27:10,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:27:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:10,320 INFO L87 Difference]: Start difference. First operand 497 states and 1563 transitions. 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) [2021-10-07 16:27:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:10,434 INFO L93 Difference]: Finished difference Result 496 states and 1562 transitions. [2021-10-07 16:27:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:10,435 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 [2021-10-07 16:27:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:10,441 INFO L225 Difference]: With dead ends: 496 [2021-10-07 16:27:10,442 INFO L226 Difference]: Without dead ends: 496 [2021-10-07 16:27:10,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-10-07 16:27:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2021-10-07 16:27:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 420 states have (on average 3.719047619047619) internal successors, (1562), 495 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1562 transitions. [2021-10-07 16:27:10,464 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1562 transitions. Word has length 2 [2021-10-07 16:27:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:10,464 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1562 transitions. [2021-10-07 16:27:10,465 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) [2021-10-07 16:27:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1562 transitions. [2021-10-07 16:27:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:27:10,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:10,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:27:10,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:10,681 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 [2021-10-07 16:27:10,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:10,686 INFO L82 PathProgramCache]: Analyzing trace with hash 20006, now seen corresponding path program 1 times [2021-10-07 16:27:10,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:10,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805970552] [2021-10-07 16:27:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:10,686 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:10,688 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) [2021-10-07 16:27:10,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:27:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:27:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:10,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:11,025 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:11,025 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:11,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:11,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805970552] [2021-10-07 16:27:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805970552] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:11,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:11,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:11,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310927870] [2021-10-07 16:27:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:11,174 INFO L87 Difference]: Start difference. First operand 496 states and 1562 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) [2021-10-07 16:27:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:11,598 INFO L93 Difference]: Finished difference Result 991 states and 3124 transitions. [2021-10-07 16:27:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:27:11,600 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 [2021-10-07 16:27:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:11,611 INFO L225 Difference]: With dead ends: 991 [2021-10-07 16:27:11,611 INFO L226 Difference]: Without dead ends: 991 [2021-10-07 16:27:11,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-10-07 16:27:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 498. [2021-10-07 16:27:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7109004739336493) internal successors, (1566), 497 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1566 transitions. [2021-10-07 16:27:11,640 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1566 transitions. Word has length 2 [2021-10-07 16:27:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:11,641 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1566 transitions. [2021-10-07 16:27:11,646 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) [2021-10-07 16:27:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1566 transitions. [2021-10-07 16:27:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:27:11,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:11,647 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:27:11,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:11,862 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 [2021-10-07 16:27:11,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 19326310, now seen corresponding path program 1 times [2021-10-07 16:27:11,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:11,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845549177] [2021-10-07 16:27:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:11,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:11,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:11,867 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) [2021-10-07 16:27:11,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:27:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:27:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:11,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:12,167 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:12,168 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:12,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:12,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:12,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845549177] [2021-10-07 16:27:12,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845549177] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:12,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:12,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:27:12,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718791225] [2021-10-07 16:27:12,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:12,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:12,758 INFO L87 Difference]: Start difference. First operand 498 states and 1566 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) [2021-10-07 16:27:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:14,697 INFO L93 Difference]: Finished difference Result 2967 states and 9364 transitions. [2021-10-07 16:27:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:27:14,700 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 [2021-10-07 16:27:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:14,730 INFO L225 Difference]: With dead ends: 2967 [2021-10-07 16:27:14,731 INFO L226 Difference]: Without dead ends: 2967 [2021-10-07 16:27:14,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-10-07 16:27:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 502. [2021-10-07 16:27:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.6948356807511735) internal successors, (1574), 501 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1574 transitions. [2021-10-07 16:27:14,778 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1574 transitions. Word has length 4 [2021-10-07 16:27:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:14,779 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1574 transitions. [2021-10-07 16:27:14,779 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) [2021-10-07 16:27:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1574 transitions. [2021-10-07 16:27:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:27:14,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:14,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:27:14,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:14,992 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 [2021-10-07 16:27:14,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash 19312568, now seen corresponding path program 1 times [2021-10-07 16:27:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:14,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572918371] [2021-10-07 16:27:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:14,995 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:14,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:14,997 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) [2021-10-07 16:27:14,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:27:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:27:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:15,371 INFO L354 Elim1Store]: treesize reduction 239, result has 19.3 percent of original size [2021-10-07 16:27:15,372 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 5 case distinctions, treesize of input 51 treesize of output 91 [2021-10-07 16:27:15,380 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 413 treesize of output 381 [2021-10-07 16:27:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:22,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572918371] [2021-10-07 16:27:22,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572918371] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:22,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:22,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:22,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264528162] [2021-10-07 16:27:22,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:22,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:22,196 INFO L87 Difference]: Start difference. First operand 502 states and 1574 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) [2021-10-07 16:27:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:22,394 INFO L93 Difference]: Finished difference Result 472 states and 1489 transitions. [2021-10-07 16:27:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:22,396 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 [2021-10-07 16:27:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:22,400 INFO L225 Difference]: With dead ends: 472 [2021-10-07 16:27:22,400 INFO L226 Difference]: Without dead ends: 472 [2021-10-07 16:27:22,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-07 16:27:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2021-10-07 16:27:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6495098039215685) internal successors, (1489), 471 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1489 transitions. [2021-10-07 16:27:22,436 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1489 transitions. Word has length 4 [2021-10-07 16:27:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:22,437 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1489 transitions. [2021-10-07 16:27:22,437 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) [2021-10-07 16:27:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1489 transitions. [2021-10-07 16:27:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:27:22,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:22,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:27:22,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:22,651 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 [2021-10-07 16:27:22,652 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:22,654 INFO L82 PathProgramCache]: Analyzing trace with hash 19312567, now seen corresponding path program 1 times [2021-10-07 16:27:22,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:22,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636413153] [2021-10-07 16:27:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:22,655 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:22,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:22,657 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) [2021-10-07 16:27:22,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:27:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:27:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:22,938 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:22,939 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 7 case distinctions, treesize of input 153 treesize of output 190 [2021-10-07 16:27:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:27,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636413153] [2021-10-07 16:27:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636413153] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:27,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:27,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:27,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787897201] [2021-10-07 16:27:27,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:27,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:27,824 INFO L87 Difference]: Start difference. First operand 472 states and 1489 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) [2021-10-07 16:27:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:27,953 INFO L93 Difference]: Finished difference Result 442 states and 1404 transitions. [2021-10-07 16:27:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:27,953 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 [2021-10-07 16:27:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:27,958 INFO L225 Difference]: With dead ends: 442 [2021-10-07 16:27:27,959 INFO L226 Difference]: Without dead ends: 442 [2021-10-07 16:27:27,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-07 16:27:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-07 16:27:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.6) internal successors, (1404), 441 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1404 transitions. [2021-10-07 16:27:27,977 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1404 transitions. Word has length 4 [2021-10-07 16:27:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1404 transitions. [2021-10-07 16:27:27,978 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) [2021-10-07 16:27:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1404 transitions. [2021-10-07 16:27:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:27:27,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:27,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:27:27,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:28,190 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 [2021-10-07 16:27:28,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:28,192 INFO L82 PathProgramCache]: Analyzing trace with hash 598684592, now seen corresponding path program 1 times [2021-10-07 16:27:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286275552] [2021-10-07 16:27:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:28,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:28,195 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) [2021-10-07 16:27:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:27:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:27:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:28,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:28,558 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:28,558 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:28,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:28,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:28,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286275552] [2021-10-07 16:27:28,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286275552] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:28,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:27:28,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30778808] [2021-10-07 16:27:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:28,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:28,945 INFO L87 Difference]: Start difference. First operand 442 states and 1404 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:29,484 INFO L93 Difference]: Finished difference Result 874 states and 2863 transitions. [2021-10-07 16:27:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:27:29,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:27:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:29,495 INFO L225 Difference]: With dead ends: 874 [2021-10-07 16:27:29,496 INFO L226 Difference]: Without dead ends: 874 [2021-10-07 16:27:29,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:27:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-10-07 16:27:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 586. [2021-10-07 16:27:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 534 states have (on average 4.063670411985019) internal successors, (2170), 585 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 2170 transitions. [2021-10-07 16:27:29,528 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 2170 transitions. Word has length 5 [2021-10-07 16:27:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:29,528 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 2170 transitions. [2021-10-07 16:27:29,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 2170 transitions. [2021-10-07 16:27:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:27:29,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:29,530 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:27:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:29,745 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 [2021-10-07 16:27:29,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash 598684594, now seen corresponding path program 1 times [2021-10-07 16:27:29,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:29,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880021916] [2021-10-07 16:27:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:29,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:29,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:29,749 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) [2021-10-07 16:27:29,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:27:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:27:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:30,043 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:30,043 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 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:27:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:30,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:30,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880021916] [2021-10-07 16:27:30,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880021916] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:30,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:27:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734071252] [2021-10-07 16:27:30,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:30,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:30,573 INFO L87 Difference]: Start difference. First operand 586 states and 2170 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:30,684 INFO L93 Difference]: Finished difference Result 360 states and 1231 transitions. [2021-10-07 16:27:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:27:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:27:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:30,688 INFO L225 Difference]: With dead ends: 360 [2021-10-07 16:27:30,689 INFO L226 Difference]: Without dead ends: 360 [2021-10-07 16:27:30,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:27:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-07 16:27:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-10-07 16:27:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 339 states have (on average 3.631268436578171) internal successors, (1231), 359 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1231 transitions. [2021-10-07 16:27:30,705 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1231 transitions. Word has length 5 [2021-10-07 16:27:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1231 transitions. [2021-10-07 16:27:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1231 transitions. [2021-10-07 16:27:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:27:30,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:30,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:27:30,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:30,918 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 [2021-10-07 16:27:30,919 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1379523531, now seen corresponding path program 1 times [2021-10-07 16:27:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482696076] [2021-10-07 16:27:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:30,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:30,923 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) [2021-10-07 16:27:30,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:27:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:27:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:31,221 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:31,222 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 83 treesize of output 126 [2021-10-07 16:27:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:39,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:39,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:39,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482696076] [2021-10-07 16:27:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482696076] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:39,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371927089] [2021-10-07 16:27:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:39,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:39,544 INFO L87 Difference]: Start difference. First operand 360 states and 1231 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:27:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:39,647 INFO L93 Difference]: Finished difference Result 332 states and 1143 transitions. [2021-10-07 16:27:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2021-10-07 16:27:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:39,651 INFO L225 Difference]: With dead ends: 332 [2021-10-07 16:27:39,652 INFO L226 Difference]: Without dead ends: 332 [2021-10-07 16:27:39,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-07 16:27:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-10-07 16:27:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 317 states have (on average 3.6056782334384856) internal successors, (1143), 331 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1143 transitions. [2021-10-07 16:27:39,666 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1143 transitions. Word has length 6 [2021-10-07 16:27:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:39,667 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1143 transitions. [2021-10-07 16:27:39,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:27:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1143 transitions. [2021-10-07 16:27:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:27:39,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:39,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:27:39,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:39,883 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 [2021-10-07 16:27:39,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1379523530, now seen corresponding path program 1 times [2021-10-07 16:27:39,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:39,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517817771] [2021-10-07 16:27:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:39,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:39,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:39,888 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) [2021-10-07 16:27:39,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:27:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:27:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:40,180 INFO L354 Elim1Store]: treesize reduction 247, result has 16.6 percent of original size [2021-10-07 16:27:40,181 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 5 case distinctions, treesize of input 51 treesize of output 83 [2021-10-07 16:27:40,188 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 794 treesize of output 762 [2021-10-07 16:27:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:41,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:41,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:41,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517817771] [2021-10-07 16:27:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517817771] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:41,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:41,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:41,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672103596] [2021-10-07 16:27:41,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:41,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:41,194 INFO L87 Difference]: Start difference. First operand 332 states and 1143 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:27:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:41,305 INFO L93 Difference]: Finished difference Result 304 states and 1055 transitions. [2021-10-07 16:27:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2021-10-07 16:27:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:41,307 INFO L225 Difference]: With dead ends: 304 [2021-10-07 16:27:41,308 INFO L226 Difference]: Without dead ends: 304 [2021-10-07 16:27:41,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-07 16:27:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-10-07 16:27:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 295 states have (on average 3.5762711864406778) internal successors, (1055), 303 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1055 transitions. [2021-10-07 16:27:41,321 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1055 transitions. Word has length 6 [2021-10-07 16:27:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:41,321 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1055 transitions. [2021-10-07 16:27:41,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:27:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1055 transitions. [2021-10-07 16:27:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:27:41,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:41,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:41,535 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 [2021-10-07 16:27:41,535 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash -184448558, now seen corresponding path program 1 times [2021-10-07 16:27:41,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:41,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460180140] [2021-10-07 16:27:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:41,537 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:41,539 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) [2021-10-07 16:27:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:27:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:41,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:27:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:41,882 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:41,883 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:42,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:42,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:42,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460180140] [2021-10-07 16:27:42,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460180140] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:42,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:42,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:27:42,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109746539] [2021-10-07 16:27:42,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:42,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:42,402 INFO L87 Difference]: Start difference. First operand 304 states and 1055 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-10-07 16:27:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:43,035 INFO L93 Difference]: Finished difference Result 518 states and 1885 transitions. [2021-10-07 16:27:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:27:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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 7 [2021-10-07 16:27:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:43,040 INFO L225 Difference]: With dead ends: 518 [2021-10-07 16:27:43,040 INFO L226 Difference]: Without dead ends: 518 [2021-10-07 16:27:43,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:27:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-07 16:27:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 440. [2021-10-07 16:27:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 431 states have (on average 3.91415313225058) internal successors, (1687), 439 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1687 transitions. [2021-10-07 16:27:43,059 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1687 transitions. Word has length 7 [2021-10-07 16:27:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:43,060 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1687 transitions. [2021-10-07 16:27:43,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-10-07 16:27:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1687 transitions. [2021-10-07 16:27:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:27:43,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:43,061 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-07 16:27:43,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:43,274 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 [2021-10-07 16:27:43,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash -189592624, now seen corresponding path program 1 times [2021-10-07 16:27:43,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:43,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506999958] [2021-10-07 16:27:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:43,277 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:43,278 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) [2021-10-07 16:27:43,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:27:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:27:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:43,653 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:43,653 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:43,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:44,485 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:44,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506999958] [2021-10-07 16:27:44,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506999958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:44,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:44,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:27:44,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074990828] [2021-10-07 16:27:44,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:27:44,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:27:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:27:44,486 INFO L87 Difference]: Start difference. First operand 440 states and 1687 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-07 16:27:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:47,349 INFO L93 Difference]: Finished difference Result 1424 states and 4993 transitions. [2021-10-07 16:27:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:27:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 7 [2021-10-07 16:27:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:47,365 INFO L225 Difference]: With dead ends: 1424 [2021-10-07 16:27:47,366 INFO L226 Difference]: Without dead ends: 1424 [2021-10-07 16:27:47,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1343.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:27:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-07 16:27:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 682. [2021-10-07 16:27:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 673 states have (on average 3.725111441307578) internal successors, (2507), 681 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2507 transitions. [2021-10-07 16:27:47,404 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2507 transitions. Word has length 7 [2021-10-07 16:27:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:47,404 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2507 transitions. [2021-10-07 16:27:47,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-07 16:27:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2507 transitions. [2021-10-07 16:27:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:27:47,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:47,405 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:27:47,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:47,620 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 [2021-10-07 16:27:47,621 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1534221338, now seen corresponding path program 2 times [2021-10-07 16:27:47,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:47,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698195287] [2021-10-07 16:27:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:27:47,623 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:47,624 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) [2021-10-07 16:27:47,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:27:47,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:27:47,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:27:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:27:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:48,036 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:48,036 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:48,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:50,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:50,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698195287] [2021-10-07 16:27:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698195287] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:50,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:50,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:27:50,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621550378] [2021-10-07 16:27:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:27:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:27:50,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:27:50,157 INFO L87 Difference]: Start difference. First operand 682 states and 2507 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) [2021-10-07 16:27:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:58,493 INFO L93 Difference]: Finished difference Result 5813 states and 22358 transitions. [2021-10-07 16:27:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:27:58,496 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 [2021-10-07 16:27:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:58,549 INFO L225 Difference]: With dead ends: 5813 [2021-10-07 16:27:58,549 INFO L226 Difference]: Without dead ends: 5813 [2021-10-07 16:27:58,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6141.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:27:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-10-07 16:27:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 690. [2021-10-07 16:27:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 681 states have (on average 3.7048458149779737) internal successors, (2523), 689 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2523 transitions. [2021-10-07 16:27:58,656 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2523 transitions. Word has length 8 [2021-10-07 16:27:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:58,656 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2523 transitions. [2021-10-07 16:27:58,657 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) [2021-10-07 16:27:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2523 transitions. [2021-10-07 16:27:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:27:58,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:58,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-07 16:27:58,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:58,871 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 [2021-10-07 16:27:58,872 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:27:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -733414256, now seen corresponding path program 1 times [2021-10-07 16:27:58,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:58,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256117747] [2021-10-07 16:27:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:58,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:58,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:58,874 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) [2021-10-07 16:27:58,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:27:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:27:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:59,324 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:59,325 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:27:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:28:00,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256117747] [2021-10-07 16:28:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256117747] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:00,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:28:00,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298603954] [2021-10-07 16:28:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:28:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:28:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:28:00,376 INFO L87 Difference]: Start difference. First operand 690 states and 2523 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-07 16:28:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:02,965 INFO L93 Difference]: Finished difference Result 1662 states and 5983 transitions. [2021-10-07 16:28:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:28:02,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 9 [2021-10-07 16:28:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:02,977 INFO L225 Difference]: With dead ends: 1662 [2021-10-07 16:28:02,977 INFO L226 Difference]: Without dead ends: 1662 [2021-10-07 16:28:02,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2037.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:28:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-10-07 16:28:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 813. [2021-10-07 16:28:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 804 states have (on average 3.9353233830845773) internal successors, (3164), 812 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 3164 transitions. [2021-10-07 16:28:03,024 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 3164 transitions. Word has length 9 [2021-10-07 16:28:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:03,024 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 3164 transitions. [2021-10-07 16:28:03,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-07 16:28:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 3164 transitions. [2021-10-07 16:28:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:28:03,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:03,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:03,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:03,240 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 [2021-10-07 16:28:03,241 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1156089058, now seen corresponding path program 1 times [2021-10-07 16:28:03,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:03,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430378947] [2021-10-07 16:28:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:03,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:03,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:03,243 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) [2021-10-07 16:28:03,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:28:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:28:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:03,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:03,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:03,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430378947] [2021-10-07 16:28:03,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430378947] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:28:03,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:28:03,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:28:03,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796036932] [2021-10-07 16:28:03,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:28:03,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:28:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:28:03,652 INFO L87 Difference]: Start difference. First operand 813 states and 3164 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-07 16:28:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:03,971 INFO L93 Difference]: Finished difference Result 801 states and 3105 transitions. [2021-10-07 16:28:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:28:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 [2021-10-07 16:28:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:03,976 INFO L225 Difference]: With dead ends: 801 [2021-10-07 16:28:03,977 INFO L226 Difference]: Without dead ends: 801 [2021-10-07 16:28:03,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:28:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-10-07 16:28:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 793. [2021-10-07 16:28:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 784 states have (on average 3.951530612244898) internal successors, (3098), 792 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 3098 transitions. [2021-10-07 16:28:04,006 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 3098 transitions. Word has length 9 [2021-10-07 16:28:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:04,006 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 3098 transitions. [2021-10-07 16:28:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-07 16:28:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 3098 transitions. [2021-10-07 16:28:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:28:04,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:04,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:04,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:04,221 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 [2021-10-07 16:28:04,221 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2052693724, now seen corresponding path program 1 times [2021-10-07 16:28:04,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:04,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807426136] [2021-10-07 16:28:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:04,224 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:04,225 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) [2021-10-07 16:28:04,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:28:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:28:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:04,665 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:04,665 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:05,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:05,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807426136] [2021-10-07 16:28:05,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807426136] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:05,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:05,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:28:05,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815511863] [2021-10-07 16:28:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:28:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:28:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:28:05,896 INFO L87 Difference]: Start difference. First operand 793 states and 3098 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) [2021-10-07 16:28:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:10,800 INFO L93 Difference]: Finished difference Result 2159 states and 8901 transitions. [2021-10-07 16:28:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:28:10,802 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 [2021-10-07 16:28:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:10,814 INFO L225 Difference]: With dead ends: 2159 [2021-10-07 16:28:10,814 INFO L226 Difference]: Without dead ends: 2159 [2021-10-07 16:28:10,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3210.4ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:28:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-10-07 16:28:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1611. [2021-10-07 16:28:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1602 states have (on average 4.194756554307116) internal successors, (6720), 1610 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 6720 transitions. [2021-10-07 16:28:10,887 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 6720 transitions. Word has length 10 [2021-10-07 16:28:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:10,888 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 6720 transitions. [2021-10-07 16:28:10,888 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) [2021-10-07 16:28:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 6720 transitions. [2021-10-07 16:28:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:28:10,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:10,890 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:10,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:11,090 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 [2021-10-07 16:28:11,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2057912744, now seen corresponding path program 1 times [2021-10-07 16:28:11,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:11,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624470348] [2021-10-07 16:28:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:11,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:11,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:11,095 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) [2021-10-07 16:28:11,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:28:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:28:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:11,547 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:11,547 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:11,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:12,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:12,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624470348] [2021-10-07 16:28:12,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624470348] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:12,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:12,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:28:12,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469226668] [2021-10-07 16:28:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 16:28:12,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 16:28:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:28:12,722 INFO L87 Difference]: Start difference. First operand 1611 states and 6720 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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) [2021-10-07 16:28:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:14,312 INFO L93 Difference]: Finished difference Result 1841 states and 7217 transitions. [2021-10-07 16:28:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:28:14,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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 [2021-10-07 16:28:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:14,324 INFO L225 Difference]: With dead ends: 1841 [2021-10-07 16:28:14,324 INFO L226 Difference]: Without dead ends: 1841 [2021-10-07 16:28:14,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1168.7ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:28:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-10-07 16:28:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1545. [2021-10-07 16:28:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1536 states have (on average 4.078776041666667) internal successors, (6265), 1544 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 6265 transitions. [2021-10-07 16:28:14,387 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 6265 transitions. Word has length 10 [2021-10-07 16:28:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:14,387 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 6265 transitions. [2021-10-07 16:28:14,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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) [2021-10-07 16:28:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 6265 transitions. [2021-10-07 16:28:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:28:14,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:14,389 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:14,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-07 16:28:14,607 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 [2021-10-07 16:28:14,607 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash 212113682, now seen corresponding path program 2 times [2021-10-07 16:28:14,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:14,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704207846] [2021-10-07 16:28:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:28:14,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:14,610 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) [2021-10-07 16:28:14,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:28:14,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:28:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:28:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:14,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:15,133 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:15,134 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:15,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:16,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:16,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704207846] [2021-10-07 16:28:16,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704207846] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:16,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:16,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:28:16,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313861621] [2021-10-07 16:28:16,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:28:16,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:28:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:28:16,875 INFO L87 Difference]: Start difference. First operand 1545 states and 6265 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-10-07 16:28:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:26,391 INFO L93 Difference]: Finished difference Result 3867 states and 15121 transitions. [2021-10-07 16:28:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:28:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 [2021-10-07 16:28:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:26,411 INFO L225 Difference]: With dead ends: 3867 [2021-10-07 16:28:26,411 INFO L226 Difference]: Without dead ends: 3867 [2021-10-07 16:28:26,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 5650.4ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:28:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-10-07 16:28:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2343. [2021-10-07 16:28:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2334 states have (on average 4.24293059125964) internal successors, (9903), 2342 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9903 transitions. [2021-10-07 16:28:26,550 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9903 transitions. Word has length 11 [2021-10-07 16:28:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 9903 transitions. [2021-10-07 16:28:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-10-07 16:28:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9903 transitions. [2021-10-07 16:28:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:28:26,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:26,554 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:26,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:26,768 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 [2021-10-07 16:28:26,769 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1852617659, now seen corresponding path program 1 times [2021-10-07 16:28:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:26,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336642111] [2021-10-07 16:28:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:26,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:26,772 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:26,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:28:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:28:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:27,300 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:27,301 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:27,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:29,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:29,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336642111] [2021-10-07 16:28:29,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336642111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:29,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:29,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:28:29,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972539577] [2021-10-07 16:28:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:28:29,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:28:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:28:29,713 INFO L87 Difference]: Start difference. First operand 2343 states and 9903 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:39,647 INFO L93 Difference]: Finished difference Result 3653 states and 15697 transitions. [2021-10-07 16:28:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:28:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:28:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:39,666 INFO L225 Difference]: With dead ends: 3653 [2021-10-07 16:28:39,666 INFO L226 Difference]: Without dead ends: 3653 [2021-10-07 16:28:39,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6856.7ms TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:28:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2021-10-07 16:28:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 2563. [2021-10-07 16:28:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2554 states have (on average 4.364526233359436) internal successors, (11147), 2562 states have internal predecessors, (11147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 11147 transitions. [2021-10-07 16:28:39,782 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 11147 transitions. Word has length 12 [2021-10-07 16:28:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:39,783 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 11147 transitions. [2021-10-07 16:28:39,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 11147 transitions. [2021-10-07 16:28:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:28:39,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:39,786 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:39,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 16:28:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:40,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1940496534, now seen corresponding path program 2 times [2021-10-07 16:28:40,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:40,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300990363] [2021-10-07 16:28:40,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:28:40,003 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:40,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:40,005 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:40,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:28:40,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:28:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:28:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:40,537 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:40,538 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:28:40,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:42,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:42,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300990363] [2021-10-07 16:28:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300990363] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:42,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:42,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-07 16:28:42,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412629151] [2021-10-07 16:28:42,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 16:28:42,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 16:28:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:28:42,971 INFO L87 Difference]: Start difference. First operand 2563 states and 11147 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:55,889 INFO L93 Difference]: Finished difference Result 5435 states and 21343 transitions. [2021-10-07 16:28:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 16:28:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:28:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:55,909 INFO L225 Difference]: With dead ends: 5435 [2021-10-07 16:28:55,909 INFO L226 Difference]: Without dead ends: 5435 [2021-10-07 16:28:55,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5392.5ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:28:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-10-07 16:28:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 2767. [2021-10-07 16:28:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2758 states have (on average 4.382886149383611) internal successors, (12088), 2766 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 12088 transitions. [2021-10-07 16:28:56,063 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 12088 transitions. Word has length 12 [2021-10-07 16:28:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:56,063 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 12088 transitions. [2021-10-07 16:28:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 12088 transitions. [2021-10-07 16:28:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:28:56,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:56,066 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:56,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:56,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1520684190, now seen corresponding path program 2 times [2021-10-07 16:28:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488655133] [2021-10-07 16:28:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:28:56,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:56,284 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:56,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:28:56,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:28:56,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:28:56,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:56,842 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:56,842 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:28:57,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:28:58,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:58,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488655133] [2021-10-07 16:28:58,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488655133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:28:58,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:28:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:28:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34571256] [2021-10-07 16:28:58,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:28:58,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:28:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:28:58,234 INFO L87 Difference]: Start difference. First operand 2767 states and 12088 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-10-07 16:28:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:58,630 INFO L93 Difference]: Finished difference Result 2561 states and 11034 transitions. [2021-10-07 16:28:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:28:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 13 [2021-10-07 16:28:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:58,640 INFO L225 Difference]: With dead ends: 2561 [2021-10-07 16:28:58,640 INFO L226 Difference]: Without dead ends: 2561 [2021-10-07 16:28:58,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:28:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-10-07 16:28:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1479. [2021-10-07 16:28:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1474 states have (on average 4.0379918588873815) internal successors, (5952), 1478 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 5952 transitions. [2021-10-07 16:28:58,691 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 5952 transitions. Word has length 13 [2021-10-07 16:28:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:58,692 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 5952 transitions. [2021-10-07 16:28:58,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-10-07 16:28:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 5952 transitions. [2021-10-07 16:28:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:28:58,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:58,694 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:58,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:58,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:58,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:28:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1932568896, now seen corresponding path program 3 times [2021-10-07 16:28:58,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:58,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423162381] [2021-10-07 16:28:58,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:28:58,910 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:58,911 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:28:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:28:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:28:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:59,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:59,566 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:59,566 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:28:59,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:29:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:29:00,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:29:00,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423162381] [2021-10-07 16:29:00,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423162381] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:29:00,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:29:00,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:29:00,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603547110] [2021-10-07 16:29:00,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:29:00,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:29:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:29:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:29:00,882 INFO L87 Difference]: Start difference. First operand 1479 states and 5952 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2021-10-07 16:29:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:29:05,800 INFO L93 Difference]: Finished difference Result 3075 states and 12053 transitions. [2021-10-07 16:29:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 16:29:05,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 13 [2021-10-07 16:29:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:29:05,810 INFO L225 Difference]: With dead ends: 3075 [2021-10-07 16:29:05,811 INFO L226 Difference]: Without dead ends: 3075 [2021-10-07 16:29:05,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3857.1ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:29:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-10-07 16:29:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 1882. [2021-10-07 16:29:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1877 states have (on average 4.295684603090037) internal successors, (8063), 1881 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:29:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 8063 transitions. [2021-10-07 16:29:05,890 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 8063 transitions. Word has length 13 [2021-10-07 16:29:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:29:05,890 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 8063 transitions. [2021-10-07 16:29:05,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2021-10-07 16:29:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 8063 transitions. [2021-10-07 16:29:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:29:05,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:29:05,893 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1] [2021-10-07 16:29:05,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-07 16:29:06,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:29:06,100 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:29:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:29:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2123035985, now seen corresponding path program 3 times [2021-10-07 16:29:06,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:29:06,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536513644] [2021-10-07 16:29:06,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:29:06,102 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:29:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:29:06,103 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:29:06,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:29:06,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:29:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:29:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:29:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:29:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:29:06,865 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:29:06,866 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:29:06,987 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 15 treesize of output 11 [2021-10-07 16:29:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:29:07,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:29:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:29:07,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:29:07,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536513644] [2021-10-07 16:29:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536513644] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:29:07,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:29:07,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 16:29:07,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265360711] [2021-10-07 16:29:07,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:29:07,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:29:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:29:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:29:07,557 INFO L87 Difference]: Start difference. First operand 1882 states and 8063 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-07 16:29:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:29:09,465 INFO L93 Difference]: Finished difference Result 1798 states and 7283 transitions. [2021-10-07 16:29:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 16:29:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 14 [2021-10-07 16:29:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:29:09,472 INFO L225 Difference]: With dead ends: 1798 [2021-10-07 16:29:09,472 INFO L226 Difference]: Without dead ends: 1798 [2021-10-07 16:29:09,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:29:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-07 16:29:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1686. [2021-10-07 16:29:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1681 states have (on average 4.174895895300416) internal successors, (7018), 1685 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:29:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 7018 transitions. [2021-10-07 16:29:09,527 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 7018 transitions. Word has length 14 [2021-10-07 16:29:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:29:09,527 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 7018 transitions. [2021-10-07 16:29:09,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-07 16:29:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 7018 transitions. [2021-10-07 16:29:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:29:09,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:29:09,533 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2021-10-07 16:29:09,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:29:09,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:29:09,748 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:29:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:29:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash -17164912, now seen corresponding path program 4 times [2021-10-07 16:29:09,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:29:09,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634332996] [2021-10-07 16:29:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:29:09,750 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:29:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:29:09,752 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:29:09,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:29:10,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:29:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:29:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:29:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:29:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:29:10,369 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:29:10,369 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:29:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:29:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:29:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:29:14,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:29:14,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634332996] [2021-10-07 16:29:14,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634332996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:29:14,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:29:14,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-07 16:29:14,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366837740] [2021-10-07 16:29:14,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 16:29:14,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:29:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 16:29:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:29:14,949 INFO L87 Difference]: Start difference. First operand 1686 states and 7018 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-07 16:29:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:29:38,809 INFO L93 Difference]: Finished difference Result 7642 states and 29356 transitions. [2021-10-07 16:29:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-07 16:29:38,813 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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 [2021-10-07 16:29:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:29:38,838 INFO L225 Difference]: With dead ends: 7642 [2021-10-07 16:29:38,838 INFO L226 Difference]: Without dead ends: 7642 [2021-10-07 16:29:38,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 14592.6ms TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2021-10-07 16:29:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2021-10-07 16:29:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 2259. [2021-10-07 16:29:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2254 states have (on average 4.311002661934339) internal successors, (9717), 2258 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:29:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 9717 transitions. [2021-10-07 16:29:38,973 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 9717 transitions. Word has length 15 [2021-10-07 16:29:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:29:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 9717 transitions. [2021-10-07 16:29:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-07 16:29:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 9717 transitions. [2021-10-07 16:29:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:29:38,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:29:38,977 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:29:38,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-07 16:29:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:29:39,192 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:29:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:29:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1802592486, now seen corresponding path program 3 times [2021-10-07 16:29:39,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:29:39,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695694783] [2021-10-07 16:29:39,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:29:39,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:29:39,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:29:39,195 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:29:39,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:29:39,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:29:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:29:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:29:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:29:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:29:40,081 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:29:40,082 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:29:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:29:40,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:29:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:29:47,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:29:47,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695694783] [2021-10-07 16:29:47,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695694783] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:29:47,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:29:47,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:29:47,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507444526] [2021-10-07 16:29:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:29:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:29:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:29:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:29:47,961 INFO L87 Difference]: Start difference. First operand 2259 states and 9717 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:29:58,968 WARN L207 SmtUtils]: Spent 7.64 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:30:08,287 WARN L207 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:30:15,594 WARN L207 SmtUtils]: Spent 6.29 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:30:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:30:49,787 INFO L93 Difference]: Finished difference Result 28713 states and 128444 transitions. [2021-10-07 16:30:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:30:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:30:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:30:49,967 INFO L225 Difference]: With dead ends: 28713 [2021-10-07 16:30:49,967 INFO L226 Difference]: Without dead ends: 28713 [2021-10-07 16:30:49,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 54911.7ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:30:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28713 states. [2021-10-07 16:30:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28713 to 2275. [2021-10-07 16:30:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2270 states have (on average 4.294713656387665) internal successors, (9749), 2274 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 9749 transitions. [2021-10-07 16:30:50,899 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 9749 transitions. Word has length 16 [2021-10-07 16:30:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:30:50,899 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 9749 transitions. [2021-10-07 16:30:50,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 9749 transitions. [2021-10-07 16:30:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 16:30:50,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:30:50,951 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-07 16:30:51,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-07 16:30:51,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:30:51,152 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:30:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:30:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -722254256, now seen corresponding path program 5 times [2021-10-07 16:30:51,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:30:51,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416895112] [2021-10-07 16:30:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:30:51,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:30:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:30:51,154 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:30:51,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:30:51,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:30:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:30:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 16:30:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:30:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:51,960 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:30:51,960 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:30:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:30:52,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:30:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:30:58,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:30:58,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416895112] [2021-10-07 16:30:58,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416895112] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:30:58,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:30:58,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:30:58,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801475507] [2021-10-07 16:30:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:30:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:30:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:30:58,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:30:58,298 INFO L87 Difference]: Start difference. First operand 2275 states and 9749 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:32:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:32:36,748 INFO L93 Difference]: Finished difference Result 7830 states and 30419 transitions. [2021-10-07 16:32:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-07 16:32:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 16:32:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:32:36,776 INFO L225 Difference]: With dead ends: 7830 [2021-10-07 16:32:36,776 INFO L226 Difference]: Without dead ends: 7830 [2021-10-07 16:32:36,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 51289.2ms TimeCoverageRelationStatistics Valid=1242, Invalid=8263, Unknown=1, NotChecked=0, Total=9506 [2021-10-07 16:32:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2021-10-07 16:32:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 2961. [2021-10-07 16:32:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.259472259810555) internal successors, (12591), 2960 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:32:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12591 transitions. [2021-10-07 16:32:36,912 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12591 transitions. Word has length 17 [2021-10-07 16:32:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:32:36,912 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12591 transitions. [2021-10-07 16:32:36,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:32:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12591 transitions. [2021-10-07 16:32:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 16:32:36,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:32:36,917 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1] [2021-10-07 16:32:36,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:32:37,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:32:37,131 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:32:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:32:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2006062027, now seen corresponding path program 6 times [2021-10-07 16:32:37,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:32:37,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045852945] [2021-10-07 16:32:37,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:32:37,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:32:37,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:32:37,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:32:37,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:32:37,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 16:32:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:32:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 16:32:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:32:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:32:37,928 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:32:37,929 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:32:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:32:38,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:32:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:32:44,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:32:44,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045852945] [2021-10-07 16:32:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045852945] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:32:44,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:32:44,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:32:44,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145013239] [2021-10-07 16:32:44,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 16:32:44,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:32:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 16:32:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:32:44,274 INFO L87 Difference]: Start difference. First operand 2961 states and 12591 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:33:17,981 INFO L93 Difference]: Finished difference Result 10245 states and 40349 transitions. [2021-10-07 16:33:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-07 16:33:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 16:33:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:33:18,015 INFO L225 Difference]: With dead ends: 10245 [2021-10-07 16:33:18,015 INFO L226 Difference]: Without dead ends: 10245 [2021-10-07 16:33:18,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 21224.3ms TimeCoverageRelationStatistics Valid=946, Invalid=4754, Unknown=0, NotChecked=0, Total=5700 [2021-10-07 16:33:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2021-10-07 16:33:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 3059. [2021-10-07 16:33:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3054 states have (on average 4.2832351015062216) internal successors, (13081), 3058 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 13081 transitions. [2021-10-07 16:33:18,258 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 13081 transitions. Word has length 17 [2021-10-07 16:33:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:33:18,258 INFO L470 AbstractCegarLoop]: Abstraction has 3059 states and 13081 transitions. [2021-10-07 16:33:18,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 13081 transitions. [2021-10-07 16:33:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 16:33:18,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:33:18,267 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:33:18,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:33:18,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:33:18,468 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:33:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:33:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2021804904, now seen corresponding path program 4 times [2021-10-07 16:33:18,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:33:18,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248126145] [2021-10-07 16:33:18,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:33:18,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:33:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:33:18,471 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:33:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:33:18,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:33:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:33:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:33:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:33:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:33:19,139 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:33:19,139 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:33:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:33:19,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:33:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:33:23,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:33:23,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248126145] [2021-10-07 16:33:23,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248126145] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:33:23,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:33:23,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 16:33:23,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91525783] [2021-10-07 16:33:23,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 16:33:23,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:33:23,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 16:33:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-10-07 16:33:23,677 INFO L87 Difference]: Start difference. First operand 3059 states and 13081 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:33:45,940 INFO L93 Difference]: Finished difference Result 8271 states and 31475 transitions. [2021-10-07 16:33:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 16:33:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 16:33:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:33:45,970 INFO L225 Difference]: With dead ends: 8271 [2021-10-07 16:33:45,970 INFO L226 Difference]: Without dead ends: 8271 [2021-10-07 16:33:45,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 11968.2ms TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 16:33:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2021-10-07 16:33:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 3703. [2021-10-07 16:33:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3698 states have (on average 4.282855597620335) internal successors, (15838), 3702 states have internal predecessors, (15838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 15838 transitions. [2021-10-07 16:33:46,172 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 15838 transitions. Word has length 18 [2021-10-07 16:33:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:33:46,172 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 15838 transitions. [2021-10-07 16:33:46,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 15838 transitions. [2021-10-07 16:33:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:33:46,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:33:46,179 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:33:46,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 16:33:46,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:33:46,394 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:33:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:33:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -818118458, now seen corresponding path program 5 times [2021-10-07 16:33:46,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:33:46,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438109241] [2021-10-07 16:33:46,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:33:46,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:33:46,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:33:46,397 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:33:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:33:46,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-07 16:33:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:33:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:33:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:33:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:33:47,332 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:33:47,332 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:33:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:33:48,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:33:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:33:53,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:33:53,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438109241] [2021-10-07 16:33:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438109241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:33:53,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:33:53,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 31 [2021-10-07 16:33:53,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278407863] [2021-10-07 16:33:53,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:33:53,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:33:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:33:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:33:53,295 INFO L87 Difference]: Start difference. First operand 3703 states and 15838 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:27,271 INFO L93 Difference]: Finished difference Result 8981 states and 34194 transitions. [2021-10-07 16:34:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 16:34:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 16:34:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:27,301 INFO L225 Difference]: With dead ends: 8981 [2021-10-07 16:34:27,301 INFO L226 Difference]: Without dead ends: 8981 [2021-10-07 16:34:27,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 21062.7ms TimeCoverageRelationStatistics Valid=756, Invalid=3404, Unknown=0, NotChecked=0, Total=4160 [2021-10-07 16:34:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2021-10-07 16:34:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 3949. [2021-10-07 16:34:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3944 states have (on average 4.3080628803245435) internal successors, (16991), 3948 states have internal predecessors, (16991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16991 transitions. [2021-10-07 16:34:27,462 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16991 transitions. Word has length 20 [2021-10-07 16:34:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:27,462 INFO L470 AbstractCegarLoop]: Abstraction has 3949 states and 16991 transitions. [2021-10-07 16:34:27,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16991 transitions. [2021-10-07 16:34:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:34:27,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:27,469 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:34:27,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 16:34:27,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:34:27,686 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:34:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash 753997619, now seen corresponding path program 1 times [2021-10-07 16:34:27,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:27,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344969002] [2021-10-07 16:34:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:34:27,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:27,689 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:34:27,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 16:34:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:34:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:34:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:34:28,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:34:28,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:28,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344969002] [2021-10-07 16:34:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344969002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:34:28,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:34:28,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:34:28,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980915679] [2021-10-07 16:34:28,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:34:28,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:34:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:34:28,367 INFO L87 Difference]: Start difference. First operand 3949 states and 16991 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:28,427 INFO L93 Difference]: Finished difference Result 4310 states and 18189 transitions. [2021-10-07 16:34:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:34:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 16:34:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:28,502 INFO L225 Difference]: With dead ends: 4310 [2021-10-07 16:34:28,502 INFO L226 Difference]: Without dead ends: 4206 [2021-10-07 16:34:28,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:34:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2021-10-07 16:34:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 4116. [2021-10-07 16:34:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.284602286548285) internal successors, (17614), 4115 states have internal predecessors, (17614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 17614 transitions. [2021-10-07 16:34:28,766 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 17614 transitions. Word has length 20 [2021-10-07 16:34:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:28,766 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 17614 transitions. [2021-10-07 16:34:28,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 17614 transitions. [2021-10-07 16:34:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:34:28,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:28,774 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:34:28,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:34:28,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:34:28,984 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:34:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash -859066152, now seen corresponding path program 6 times [2021-10-07 16:34:28,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:28,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811972690] [2021-10-07 16:34:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:34:28,986 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:28,987 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:34:28,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 16:34:29,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:34:29,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 16:34:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:30,029 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:34:30,029 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:34:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:34:31,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:34:36,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811972690] [2021-10-07 16:34:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811972690] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:36,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:36,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-07 16:34:36,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462519058] [2021-10-07 16:34:36,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 16:34:36,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 16:34:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:34:36,983 INFO L87 Difference]: Start difference. First operand 4116 states and 17614 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:11,431 INFO L93 Difference]: Finished difference Result 11575 states and 44644 transitions. [2021-10-07 16:35:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-07 16:35:11,433 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:11,482 INFO L225 Difference]: With dead ends: 11575 [2021-10-07 16:35:11,482 INFO L226 Difference]: Without dead ends: 11575 [2021-10-07 16:35:11,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 19679.6ms TimeCoverageRelationStatistics Valid=1249, Invalid=5393, Unknown=0, NotChecked=0, Total=6642 [2021-10-07 16:35:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11575 states. [2021-10-07 16:35:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11575 to 5451. [2021-10-07 16:35:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 5446 states have (on average 4.383951524054352) internal successors, (23875), 5450 states have internal predecessors, (23875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 23875 transitions. [2021-10-07 16:35:11,924 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 23875 transitions. Word has length 22 [2021-10-07 16:35:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 5451 states and 23875 transitions. [2021-10-07 16:35:11,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 23875 transitions. [2021-10-07 16:35:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:11,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:11,934 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:11,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-07 16:35:12,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:12,149 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -404012412, now seen corresponding path program 1 times [2021-10-07 16:35:12,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:12,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864687022] [2021-10-07 16:35:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:35:12,150 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:12,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:12,151 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:12,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 16:35:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:35:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:35:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:12,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:13,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:13,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864687022] [2021-10-07 16:35:13,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864687022] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:13,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:13,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:35:13,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066650296] [2021-10-07 16:35:13,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:13,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:13,249 INFO L87 Difference]: Start difference. First operand 5451 states and 23875 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:15,300 INFO L93 Difference]: Finished difference Result 8295 states and 36397 transitions. [2021-10-07 16:35:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:35:15,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:15,391 INFO L225 Difference]: With dead ends: 8295 [2021-10-07 16:35:15,392 INFO L226 Difference]: Without dead ends: 8295 [2021-10-07 16:35:15,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1378.8ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-10-07 16:35:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-10-07 16:35:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 5945. [2021-10-07 16:35:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5945 states, 5940 states have (on average 4.315151515151515) internal successors, (25632), 5944 states have internal predecessors, (25632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5945 states to 5945 states and 25632 transitions. [2021-10-07 16:35:15,721 INFO L78 Accepts]: Start accepts. Automaton has 5945 states and 25632 transitions. Word has length 22 [2021-10-07 16:35:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 5945 states and 25632 transitions. [2021-10-07 16:35:15,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5945 states and 25632 transitions. [2021-10-07 16:35:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:15,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:15,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:15,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:15,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:15,946 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -401181223, now seen corresponding path program 1 times [2021-10-07 16:35:15,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:15,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375809496] [2021-10-07 16:35:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:35:15,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:15,949 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:15,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 16:35:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:35:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:35:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:16,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:16,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375809496] [2021-10-07 16:35:16,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375809496] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:16,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:16,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 16:35:16,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615133058] [2021-10-07 16:35:16,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:35:16,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:35:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:35:16,748 INFO L87 Difference]: Start difference. First operand 5945 states and 25632 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:17,038 INFO L93 Difference]: Finished difference Result 5983 states and 25596 transitions. [2021-10-07 16:35:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:35:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:17,058 INFO L225 Difference]: With dead ends: 5983 [2021-10-07 16:35:17,059 INFO L226 Difference]: Without dead ends: 5983 [2021-10-07 16:35:17,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:35:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-10-07 16:35:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 5797. [2021-10-07 16:35:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5797 states, 5792 states have (on average 4.319233425414365) internal successors, (25017), 5796 states have internal predecessors, (25017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5797 states to 5797 states and 25017 transitions. [2021-10-07 16:35:17,356 INFO L78 Accepts]: Start accepts. Automaton has 5797 states and 25017 transitions. Word has length 22 [2021-10-07 16:35:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:17,365 INFO L470 AbstractCegarLoop]: Abstraction has 5797 states and 25017 transitions. [2021-10-07 16:35:17,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5797 states and 25017 transitions. [2021-10-07 16:35:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:17,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:17,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:17,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-07 16:35:17,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:17,604 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1817358540, now seen corresponding path program 2 times [2021-10-07 16:35:17,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:17,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158158908] [2021-10-07 16:35:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:35:17,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:17,607 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:17,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 16:35:18,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:35:18,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:35:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:18,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:18,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:18,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158158908] [2021-10-07 16:35:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158158908] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:18,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:35:18,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669997028] [2021-10-07 16:35:18,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:18,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:18,874 INFO L87 Difference]: Start difference. First operand 5797 states and 25017 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:20,766 INFO L93 Difference]: Finished difference Result 8849 states and 38490 transitions. [2021-10-07 16:35:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 16:35:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:20,804 INFO L225 Difference]: With dead ends: 8849 [2021-10-07 16:35:20,805 INFO L226 Difference]: Without dead ends: 8849 [2021-10-07 16:35:20,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1282.1ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:35:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2021-10-07 16:35:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 6049. [2021-10-07 16:35:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 6044 states have (on average 4.3476174718729315) internal successors, (26277), 6048 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 26277 transitions. [2021-10-07 16:35:21,064 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 26277 transitions. Word has length 22 [2021-10-07 16:35:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:21,064 INFO L470 AbstractCegarLoop]: Abstraction has 6049 states and 26277 transitions. [2021-10-07 16:35:21,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 26277 transitions. [2021-10-07 16:35:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:21,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:21,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:21,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:21,277 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash 379718798, now seen corresponding path program 3 times [2021-10-07 16:35:21,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:21,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219880594] [2021-10-07 16:35:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:35:21,279 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:21,280 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 16:35:21,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:35:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:35:21,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:22,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:22,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:22,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219880594] [2021-10-07 16:35:22,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219880594] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:22,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:22,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:35:22,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344397542] [2021-10-07 16:35:22,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:22,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:22,551 INFO L87 Difference]: Start difference. First operand 6049 states and 26277 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:24,260 INFO L93 Difference]: Finished difference Result 8579 states and 37618 transitions. [2021-10-07 16:35:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 16:35:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:24,289 INFO L225 Difference]: With dead ends: 8579 [2021-10-07 16:35:24,289 INFO L226 Difference]: Without dead ends: 8579 [2021-10-07 16:35:24,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1207.2ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:35:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8579 states. [2021-10-07 16:35:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8579 to 6049. [2021-10-07 16:35:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 6044 states have (on average 4.3476174718729315) internal successors, (26277), 6048 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 26277 transitions. [2021-10-07 16:35:24,521 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 26277 transitions. Word has length 22 [2021-10-07 16:35:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:24,522 INFO L470 AbstractCegarLoop]: Abstraction has 6049 states and 26277 transitions. [2021-10-07 16:35:24,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 26277 transitions. [2021-10-07 16:35:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:24,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:24,530 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:24,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:24,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:24,744 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1219021372, now seen corresponding path program 4 times [2021-10-07 16:35:24,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:24,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404001635] [2021-10-07 16:35:24,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:35:24,746 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:24,747 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:24,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-07 16:35:25,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:35:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:35:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:25,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:25,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:25,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404001635] [2021-10-07 16:35:25,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404001635] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:25,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:25,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:35:25,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132117024] [2021-10-07 16:35:25,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:25,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:25,809 INFO L87 Difference]: Start difference. First operand 6049 states and 26277 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:27,209 INFO L93 Difference]: Finished difference Result 6813 states and 28883 transitions. [2021-10-07 16:35:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:35:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:27,232 INFO L225 Difference]: With dead ends: 6813 [2021-10-07 16:35:27,232 INFO L226 Difference]: Without dead ends: 6813 [2021-10-07 16:35:27,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 900.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:35:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2021-10-07 16:35:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 6327. [2021-10-07 16:35:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6322 states have (on average 4.316197405884214) internal successors, (27287), 6326 states have internal predecessors, (27287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 27287 transitions. [2021-10-07 16:35:27,366 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 27287 transitions. Word has length 22 [2021-10-07 16:35:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:27,366 INFO L470 AbstractCegarLoop]: Abstraction has 6327 states and 27287 transitions. [2021-10-07 16:35:27,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 27287 transitions. [2021-10-07 16:35:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:27,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:27,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:27,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:27,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:27,574 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash -857775888, now seen corresponding path program 5 times [2021-10-07 16:35:27,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:27,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786885782] [2021-10-07 16:35:27,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:35:27,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:27,578 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-07 16:35:28,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:35:28,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:35:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:28,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:28,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:28,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786885782] [2021-10-07 16:35:28,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786885782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:28,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:28,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-07 16:35:28,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995121938] [2021-10-07 16:35:28,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:28,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:28,827 INFO L87 Difference]: Start difference. First operand 6327 states and 27287 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:30,922 INFO L93 Difference]: Finished difference Result 7339 states and 31097 transitions. [2021-10-07 16:35:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 16:35:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:30,949 INFO L225 Difference]: With dead ends: 7339 [2021-10-07 16:35:30,949 INFO L226 Difference]: Without dead ends: 7339 [2021-10-07 16:35:30,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-10-07 16:35:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2021-10-07 16:35:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 6513. [2021-10-07 16:35:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6513 states, 6508 states have (on average 4.3577135832821146) internal successors, (28360), 6512 states have internal predecessors, (28360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6513 states to 6513 states and 28360 transitions. [2021-10-07 16:35:31,236 INFO L78 Accepts]: Start accepts. Automaton has 6513 states and 28360 transitions. Word has length 22 [2021-10-07 16:35:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:31,237 INFO L470 AbstractCegarLoop]: Abstraction has 6513 states and 28360 transitions. [2021-10-07 16:35:31,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6513 states and 28360 transitions. [2021-10-07 16:35:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:35:31,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:31,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:31,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:31,451 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1999551666, now seen corresponding path program 6 times [2021-10-07 16:35:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:31,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136329472] [2021-10-07 16:35:31,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:35:31,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:31,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:31,454 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:31,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-07 16:35:32,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:35:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:35:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:32,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:35:32,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:32,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136329472] [2021-10-07 16:35:32,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136329472] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:32,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:32,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:35:32,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552547742] [2021-10-07 16:35:32,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:35:32,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:35:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:35:32,636 INFO L87 Difference]: Start difference. First operand 6513 states and 28360 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:34,130 INFO L93 Difference]: Finished difference Result 7185 states and 30471 transitions. [2021-10-07 16:35:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:35:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:35:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:34,154 INFO L225 Difference]: With dead ends: 7185 [2021-10-07 16:35:34,154 INFO L226 Difference]: Without dead ends: 7185 [2021-10-07 16:35:34,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:35:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2021-10-07 16:35:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 6327. [2021-10-07 16:35:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6322 states have (on average 4.316197405884214) internal successors, (27287), 6326 states have internal predecessors, (27287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 27287 transitions. [2021-10-07 16:35:34,299 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 27287 transitions. Word has length 22 [2021-10-07 16:35:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:34,299 INFO L470 AbstractCegarLoop]: Abstraction has 6327 states and 27287 transitions. [2021-10-07 16:35:34,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 27287 transitions. [2021-10-07 16:35:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:35:34,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:34,307 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:35:34,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:34,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:35:34,508 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:35:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -511793454, now seen corresponding path program 7 times [2021-10-07 16:35:34,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:34,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869392187] [2021-10-07 16:35:34,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:35:34,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:34,512 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:35:34,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-07 16:35:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:35:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:35:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:35,469 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:35,469 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-07 16:35:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-07 16:35:38,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:38,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869392187] [2021-10-07 16:35:38,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869392187] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:38,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:38,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:35:38,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220442178] [2021-10-07 16:35:38,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:35:38,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:35:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:35:38,860 INFO L87 Difference]: Start difference. First operand 6327 states and 27287 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:46,945 WARN L207 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-10-07 16:36:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:28,091 INFO L93 Difference]: Finished difference Result 12439 states and 49910 transitions. [2021-10-07 16:36:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 16:36:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:28,132 INFO L225 Difference]: With dead ends: 12439 [2021-10-07 16:36:28,133 INFO L226 Difference]: Without dead ends: 12439 [2021-10-07 16:36:28,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 46583.4ms TimeCoverageRelationStatistics Valid=529, Invalid=1276, Unknown=1, NotChecked=0, Total=1806 [2021-10-07 16:36:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2021-10-07 16:36:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 5125. [2021-10-07 16:36:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5120 states have (on average 4.2798828125) internal successors, (21913), 5124 states have internal predecessors, (21913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21913 transitions. [2021-10-07 16:36:28,300 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21913 transitions. Word has length 23 [2021-10-07 16:36:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:28,300 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 21913 transitions. [2021-10-07 16:36:28,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21913 transitions. [2021-10-07 16:36:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:28,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:28,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:28,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:28,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:28,507 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash -587617384, now seen corresponding path program 1 times [2021-10-07 16:36:28,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:28,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750415604] [2021-10-07 16:36:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:36:28,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:28,510 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:28,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-07 16:36:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:36:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:36:29,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:29,288 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:36:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-07 16:36:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:29,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:29,707 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-07 16:36:29,707 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 77 treesize of output 61 [2021-10-07 16:36:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:30,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:30,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750415604] [2021-10-07 16:36:30,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750415604] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:30,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:30,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:36:30,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789687807] [2021-10-07 16:36:30,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:30,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:30,503 INFO L87 Difference]: Start difference. First operand 5125 states and 21913 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:31,210 INFO L93 Difference]: Finished difference Result 5550 states and 23344 transitions. [2021-10-07 16:36:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:31,291 INFO L225 Difference]: With dead ends: 5550 [2021-10-07 16:36:31,291 INFO L226 Difference]: Without dead ends: 5527 [2021-10-07 16:36:31,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5527 states. [2021-10-07 16:36:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5527 to 5269. [2021-10-07 16:36:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5269 states, 5264 states have (on average 4.264817629179332) internal successors, (22450), 5268 states have internal predecessors, (22450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5269 states to 5269 states and 22450 transitions. [2021-10-07 16:36:31,411 INFO L78 Accepts]: Start accepts. Automaton has 5269 states and 22450 transitions. Word has length 23 [2021-10-07 16:36:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:31,412 INFO L470 AbstractCegarLoop]: Abstraction has 5269 states and 22450 transitions. [2021-10-07 16:36:31,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5269 states and 22450 transitions. [2021-10-07 16:36:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:31,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:31,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:31,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:31,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:31,619 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2021719582, now seen corresponding path program 2 times [2021-10-07 16:36:31,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:31,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431659655] [2021-10-07 16:36:31,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:36:31,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:31,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:31,623 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:31,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-07 16:36:32,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:36:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:36:32,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:32,563 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:36:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-07 16:36:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:32,946 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:36:32,947 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 90 treesize of output 69 [2021-10-07 16:36:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:34,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:34,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431659655] [2021-10-07 16:36:34,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431659655] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:34,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:34,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:36:34,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410031447] [2021-10-07 16:36:34,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:34,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:34,600 INFO L87 Difference]: Start difference. First operand 5269 states and 22450 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:35,118 INFO L93 Difference]: Finished difference Result 5611 states and 23604 transitions. [2021-10-07 16:36:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:35,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:35,137 INFO L225 Difference]: With dead ends: 5611 [2021-10-07 16:36:35,137 INFO L226 Difference]: Without dead ends: 5592 [2021-10-07 16:36:35,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-10-07 16:36:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5301. [2021-10-07 16:36:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5301 states, 5296 states have (on average 4.263595166163142) internal successors, (22580), 5300 states have internal predecessors, (22580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 22580 transitions. [2021-10-07 16:36:35,423 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 22580 transitions. Word has length 23 [2021-10-07 16:36:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:35,423 INFO L470 AbstractCegarLoop]: Abstraction has 5301 states and 22580 transitions. [2021-10-07 16:36:35,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 22580 transitions. [2021-10-07 16:36:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:35,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:35,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:35,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:35,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:35,647 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:35,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1054351330, now seen corresponding path program 3 times [2021-10-07 16:36:35,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:35,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037074506] [2021-10-07 16:36:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:36:35,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:35,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:35,650 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:35,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-07 16:36:36,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:36:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:36:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:36,621 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:36:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-07 16:36:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:36,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:37,097 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:36:37,097 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 90 treesize of output 69 [2021-10-07 16:36:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:38,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:38,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037074506] [2021-10-07 16:36:38,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037074506] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:38,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:38,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:36:38,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383785516] [2021-10-07 16:36:38,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:38,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:38,552 INFO L87 Difference]: Start difference. First operand 5301 states and 22580 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:39,199 INFO L93 Difference]: Finished difference Result 5671 states and 23821 transitions. [2021-10-07 16:36:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:39,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:39,218 INFO L225 Difference]: With dead ends: 5671 [2021-10-07 16:36:39,219 INFO L226 Difference]: Without dead ends: 5646 [2021-10-07 16:36:39,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-10-07 16:36:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 5379. [2021-10-07 16:36:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5374 states have (on average 4.260141421659844) internal successors, (22894), 5378 states have internal predecessors, (22894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 22894 transitions. [2021-10-07 16:36:39,328 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 22894 transitions. Word has length 23 [2021-10-07 16:36:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:39,329 INFO L470 AbstractCegarLoop]: Abstraction has 5379 states and 22894 transitions. [2021-10-07 16:36:39,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 22894 transitions. [2021-10-07 16:36:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:39,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:39,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:39,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:39,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:39,537 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1078574398, now seen corresponding path program 4 times [2021-10-07 16:36:39,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:39,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332288082] [2021-10-07 16:36:39,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:36:39,539 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:39,540 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:39,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-07 16:36:40,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:36:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:36:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:40,540 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:36:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-07 16:36:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:40,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:41,053 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:36:41,054 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 90 treesize of output 69 [2021-10-07 16:36:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:42,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:42,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332288082] [2021-10-07 16:36:42,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332288082] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:42,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:42,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:36:42,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787827173] [2021-10-07 16:36:42,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:42,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:42,596 INFO L87 Difference]: Start difference. First operand 5379 states and 22894 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:43,330 INFO L93 Difference]: Finished difference Result 5687 states and 23908 transitions. [2021-10-07 16:36:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:43,351 INFO L225 Difference]: With dead ends: 5687 [2021-10-07 16:36:43,352 INFO L226 Difference]: Without dead ends: 5668 [2021-10-07 16:36:43,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-10-07 16:36:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5377. [2021-10-07 16:36:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5372 states have (on average 4.259865971705138) internal successors, (22884), 5376 states have internal predecessors, (22884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 22884 transitions. [2021-10-07 16:36:43,492 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 22884 transitions. Word has length 23 [2021-10-07 16:36:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:43,492 INFO L470 AbstractCegarLoop]: Abstraction has 5377 states and 22884 transitions. [2021-10-07 16:36:43,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 22884 transitions. [2021-10-07 16:36:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:43,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:43,500 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:43,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:43,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:43,701 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash -140321986, now seen corresponding path program 5 times [2021-10-07 16:36:43,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:43,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975888345] [2021-10-07 16:36:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:36:43,703 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:43,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:43,704 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:43,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-07 16:36:44,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:36:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:36:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:44,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-07 16:36:44,764 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 [2021-10-07 16:36:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:44,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:45,154 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:36:45,154 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 90 treesize of output 69 [2021-10-07 16:36:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:46,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:46,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975888345] [2021-10-07 16:36:46,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975888345] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:46,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:46,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2021-10-07 16:36:46,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893440436] [2021-10-07 16:36:46,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:36:46,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:46,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:36:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:36:46,557 INFO L87 Difference]: Start difference. First operand 5377 states and 22884 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:47,141 INFO L93 Difference]: Finished difference Result 5747 states and 24125 transitions. [2021-10-07 16:36:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:47,159 INFO L225 Difference]: With dead ends: 5747 [2021-10-07 16:36:47,159 INFO L226 Difference]: Without dead ends: 5724 [2021-10-07 16:36:47,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:36:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2021-10-07 16:36:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 5345. [2021-10-07 16:36:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5345 states, 5340 states have (on average 4.260674157303371) internal successors, (22752), 5344 states have internal predecessors, (22752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 22752 transitions. [2021-10-07 16:36:47,266 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 22752 transitions. Word has length 23 [2021-10-07 16:36:47,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:47,266 INFO L470 AbstractCegarLoop]: Abstraction has 5345 states and 22752 transitions. [2021-10-07 16:36:47,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 22752 transitions. [2021-10-07 16:36:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:47,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:47,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:47,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:47,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:47,473 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1317412196, now seen corresponding path program 6 times [2021-10-07 16:36:47,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:47,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661783011] [2021-10-07 16:36:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:36:47,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:47,476 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:47,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-07 16:36:48,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:36:48,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:36:48,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:48,560 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:36:48,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-07 16:36:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:48,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:49,016 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-07 16:36:49,016 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 77 treesize of output 61 [2021-10-07 16:36:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:36:49,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:49,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661783011] [2021-10-07 16:36:49,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661783011] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:49,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:49,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:36:49,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681356164] [2021-10-07 16:36:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:49,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:49,786 INFO L87 Difference]: Start difference. First operand 5345 states and 22752 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:50,736 INFO L93 Difference]: Finished difference Result 5846 states and 24385 transitions. [2021-10-07 16:36:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:36:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:36:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:50,755 INFO L225 Difference]: With dead ends: 5846 [2021-10-07 16:36:50,755 INFO L226 Difference]: Without dead ends: 5815 [2021-10-07 16:36:50,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5815 states. [2021-10-07 16:36:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5815 to 5431. [2021-10-07 16:36:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5426 states have (on average 4.242351640250645) internal successors, (23019), 5430 states have internal predecessors, (23019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 23019 transitions. [2021-10-07 16:36:50,868 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 23019 transitions. Word has length 23 [2021-10-07 16:36:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:50,868 INFO L470 AbstractCegarLoop]: Abstraction has 5431 states and 23019 transitions. [2021-10-07 16:36:50,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 23019 transitions. [2021-10-07 16:36:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:36:50,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:50,874 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:36:50,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:51,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:36:51,075 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:36:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1210707681, now seen corresponding path program 1 times [2021-10-07 16:36:51,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:51,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513446017] [2021-10-07 16:36:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:36:51,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:51,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:51,078 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:36:51,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-07 16:36:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:36:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:36:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:52,501 INFO L354 Elim1Store]: treesize reduction 262, result has 4.7 percent of original size [2021-10-07 16:36:52,502 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 71 treesize of output 37 [2021-10-07 16:36:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:36:52,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:53,017 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-07 16:36:53,018 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 77 treesize of output 61 [2021-10-07 16:37:00,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:00,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513446017] [2021-10-07 16:37:00,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-07 16:37:00,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037406130] [2021-10-07 16:37:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:37:00,673 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-07 16:37:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-07 16:37:00,677 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-07 16:37:00,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-10-07 16:37:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:37:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:37:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:02,693 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:37:02,694 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:37:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:03,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-10-07 16:37:05,742 INFO L354 Elim1Store]: treesize reduction 815, result has 6.5 percent of original size [2021-10-07 16:37:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 100 [2021-10-07 16:40:15,275 WARN L207 SmtUtils]: Spent 3.11 m on a formula simplification. DAG size of input: 344 DAG size of output: 123 [2021-10-07 16:40:15,277 INFO L354 Elim1Store]: treesize reduction 1513, result has 22.3 percent of original size [2021-10-07 16:40:15,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 123 treesize of output 499 Received shutdown request... [2021-10-07 16:40:18,903 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-07 16:40:18,906 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:40:18,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:18,938 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:40:18,938 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 [2021-10-07 16:40:18,938 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:40:19,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:19,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-07 16:40:19,307 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,310 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:40:19,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,313 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,313 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:40:19,313 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:40:19,319 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:40:19,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:40:19,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:40:19 BasicIcfg [2021-10-07 16:40:19,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:40:19,322 INFO L168 Benchmark]: Toolchain (without parser) took 829027.80 ms. Allocated memory was 163.6 MB in the beginning and 1.1 GB in the end (delta: 929.0 MB). Free memory was 138.0 MB in the beginning and 789.1 MB in the end (delta: -651.1 MB). Peak memory consumption was 690.3 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,322 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 125.8 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:40:19,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.83 ms. Allocated memory is still 163.6 MB. Free memory was 137.7 MB in the beginning and 124.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.52 ms. Allocated memory is still 163.6 MB. Free memory was 124.3 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,323 INFO L168 Benchmark]: Boogie Preprocessor took 67.36 ms. Allocated memory is still 163.6 MB. Free memory was 122.5 MB in the beginning and 145.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,323 INFO L168 Benchmark]: RCFGBuilder took 1004.29 ms. Allocated memory is still 163.6 MB. Free memory was 145.2 MB in the beginning and 128.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,324 INFO L168 Benchmark]: TraceAbstraction took 827472.50 ms. Allocated memory was 163.6 MB in the beginning and 1.1 GB in the end (delta: 929.0 MB). Free memory was 127.3 MB in the beginning and 789.1 MB in the end (delta: -661.9 MB). Peak memory consumption was 679.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:40:19,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 125.8 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 404.83 ms. Allocated memory is still 163.6 MB. Free memory was 137.7 MB in the beginning and 124.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.52 ms. Allocated memory is still 163.6 MB. Free memory was 124.3 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.36 ms. Allocated memory is still 163.6 MB. Free memory was 122.5 MB in the beginning and 145.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1004.29 ms. Allocated memory is still 163.6 MB. Free memory was 145.2 MB in the beginning and 128.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 827472.50 ms. Allocated memory was 163.6 MB in the beginning and 1.1 GB in the end (delta: 929.0 MB). Free memory was 127.3 MB in the beginning and 789.1 MB in the end (delta: -661.9 MB). Peak memory consumption was 679.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20938.3ms, 165 PlacesBefore, 55 PlacesAfterwards, 167 TransitionsBefore, 49 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 88 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 165 TotalNumberOfCompositions, 3110 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2961, positive: 2932, positive conditional: 0, positive unconditional: 2932, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1546, positive: 1536, positive conditional: 0, positive unconditional: 1536, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1546, positive: 1536, positive conditional: 0, positive unconditional: 1536, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 836, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 836, negative conditional: 0, negative unconditional: 836, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2961, positive: 1396, positive conditional: 0, positive unconditional: 1396, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 1546, unknown conditional: 0, unknown unconditional: 1546] , Statistics on independence cache: Total cache size (in pairs): 116, Positive cache size: 114, Positive conditional cache size: 0, Positive unconditional cache size: 114, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 88]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 82]: 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 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - 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 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 81]: 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 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 198 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 827208.6ms, OverallIterations: 47, TraceHistogramMax: 14, EmptinessCheckTime: 234.8ms, AutomataDifference: 439343.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21070.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3206 SDtfs, 29552 SDslu, 29774 SDs, 0 SdLazy, 36044 SolverSat, 1610 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 179828.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1672 GetRequests, 663 SyntacticMatches, 1 SemanticMatches, 1008 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9085 ImplicationChecksByTransitivity, 289359.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6513occurred in iteration=38, InterpolantAutomatonStates: 730, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6513.4ms AutomataMinimizationTime, 46 MinimizatonAttempts, 97469 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 427.9ms SsaConstructionTime, 5423.2ms SatisfiabilityAnalysisTime, 125476.0ms InterpolantComputationTime, 637 NumberOfCodeBlocks, 632 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1182 ConstructedInterpolants, 184 QuantifiedInterpolants, 21603 SizeOfPredicates, 486 NumberOfNonLiveVariables, 4547 ConjunctsInSsa, 712 ConjunctsInUnsatCore, 92 InterpolantComputations, 28 PerfectInterpolantSequences, 260/1230 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