/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/parallel-min-max-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:12:14,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:12:14,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:12:14,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 17:12:14,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 17:12:14,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 17:12:14,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 17:12:14,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 17:12:14,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 17:12:14,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 17:12:14,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 17:12:14,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 17:12:14,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 17:12:14,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 17:12:14,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 17:12:14,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 17:12:14,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 17:12:14,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 17:12:14,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 17:12:14,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 17:12:14,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 17:12:15,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:12:15,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:12:15,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:12:15,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:12:15,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:12:15,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:12:15,011 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:12:15,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:12:15,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:12:15,012 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:12:15,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:12:15,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:12:15,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:12:15,014 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:12:15,015 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:12:15,015 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:12:15,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:12:15,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:12:15,016 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:12:15,016 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:12:15,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:12:15,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:12:15,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:12:15,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:12:15,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:12:15,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:12:15,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:12:15,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:12:15,018 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:12:15,018 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:12:15,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:12:15,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:12:15,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:12:15,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:12:15,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:12:15,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:12:15,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:12:15,510 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:12:15,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2021-10-08 17:12:15,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f41a15c15/e6f50e2c521743c4be76befbb66ab561/FLAG758bec897 [2021-10-08 17:12:16,182 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:12:16,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2021-10-08 17:12:16,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f41a15c15/e6f50e2c521743c4be76befbb66ab561/FLAG758bec897 [2021-10-08 17:12:16,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f41a15c15/e6f50e2c521743c4be76befbb66ab561 [2021-10-08 17:12:16,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:12:16,559 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:12:16,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:12:16,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:12:16,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:12:16,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:12:16" (1/1) ... [2021-10-08 17:12:16,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fdf09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:16, skipping insertion in model container [2021-10-08 17:12:16,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:12:16" (1/1) ... [2021-10-08 17:12:16,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:12:16,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:12:16,854 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/parallel-min-max-1.wvr.c[2811,2824] [2021-10-08 17:12:16,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:12:16,916 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 17:12:16,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:12:16,980 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/parallel-min-max-1.wvr.c[2811,2824] [2021-10-08 17:12:16,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:12:17,004 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:12:17,070 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/parallel-min-max-1.wvr.c[2811,2824] [2021-10-08 17:12:17,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:12:17,116 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:12:17,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17 WrapperNode [2021-10-08 17:12:17,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:12:17,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:12:17,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:12:17,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:12:17,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:12:17,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:12:17,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:12:17,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:12:17,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:12:17,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:12:17,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:12:17,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:12:17,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (1/1) ... [2021-10-08 17:12:17,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:12:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:12:17,344 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) [2021-10-08 17:12:17,359 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 [2021-10-08 17:12:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:12:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:12:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:12:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:12:17,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:12:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:12:17,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:12:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 17:12:17,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 17:12:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 17:12:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:12:17,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:12:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:12:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:12:17,416 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 17:12:18,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:12:18,287 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-08 17:12:18,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:12:18 BoogieIcfgContainer [2021-10-08 17:12:18,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:12:18,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:12:18,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:12:18,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:12:18,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:12:16" (1/3) ... [2021-10-08 17:12:18,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287c69b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:12:18, skipping insertion in model container [2021-10-08 17:12:18,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:12:17" (2/3) ... [2021-10-08 17:12:18,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287c69b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:12:18, skipping insertion in model container [2021-10-08 17:12:18,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:12:18" (3/3) ... [2021-10-08 17:12:18,300 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2021-10-08 17:12:18,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:12:18,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2021-10-08 17:12:18,307 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:12:18,351 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,352 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,352 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,352 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,363 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,363 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,363 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,364 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,364 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,364 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,364 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,366 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,366 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,366 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,366 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,370 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,371 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,371 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,371 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,375 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,375 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,375 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:12:18,399 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 17:12:18,453 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:12:18,461 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 [2021-10-08 17:12:18,462 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-08 17:12:18,482 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:12:18,494 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 215 transitions, 454 flow [2021-10-08 17:12:18,498 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 215 transitions, 454 flow [2021-10-08 17:12:18,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 215 transitions, 454 flow [2021-10-08 17:12:18,593 INFO L129 PetriNetUnfolder]: 15/212 cut-off events. [2021-10-08 17:12:18,593 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 17:12:18,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 212 events. 15/212 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 301 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 175. Up to 2 conditions per place. [2021-10-08 17:12:18,608 INFO L116 LiptonReduction]: Number of co-enabled transitions 3782 [2021-10-08 17:12:53,674 INFO L131 LiptonReduction]: Checked pairs total: 8722 [2021-10-08 17:12:53,675 INFO L133 LiptonReduction]: Total number of compositions: 232 [2021-10-08 17:12:53,686 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 65 transitions, 154 flow [2021-10-08 17:12:53,822 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2204 states, 1922 states have (on average 3.7122788761706556) internal successors, (7135), 2203 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:12:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 2204 states, 1922 states have (on average 3.7122788761706556) internal successors, (7135), 2203 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:12:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:12:53,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:12:53,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:12:53,845 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:12:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:12:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash 25873, now seen corresponding path program 1 times [2021-10-08 17:12:53,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:12:53,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500300667] [2021-10-08 17:12:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:12:53,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:12:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:12:53,879 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) [2021-10-08 17:12:53,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 17:12:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:12:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:12:53,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:12:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:12:54,504 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:12:54,506 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 [2021-10-08 17:12:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:54,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:12:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:54,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:12:54,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500300667] [2021-10-08 17:12:54,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500300667] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:12:54,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:12:54,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:12:54,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329200234] [2021-10-08 17:12:54,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:12:54,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:12:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:12:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:12:54,819 INFO L87 Difference]: Start difference. First operand has 2204 states, 1922 states have (on average 3.7122788761706556) internal successors, (7135), 2203 states have internal predecessors, (7135), 0 states have call successors, (0), 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) [2021-10-08 17:12:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:12:55,593 INFO L93 Difference]: Finished difference Result 1609 states and 5217 transitions. [2021-10-08 17:12:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:12:55,596 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 [2021-10-08 17:12:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:12:55,640 INFO L225 Difference]: With dead ends: 1609 [2021-10-08 17:12:55,641 INFO L226 Difference]: Without dead ends: 1609 [2021-10-08 17:12:55,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:12:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-10-08 17:12:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1605. [2021-10-08 17:12:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1452 states have (on average 3.59297520661157) internal successors, (5217), 1604 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:12:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5217 transitions. [2021-10-08 17:12:55,814 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5217 transitions. Word has length 2 [2021-10-08 17:12:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:12:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5217 transitions. [2021-10-08 17:12:55,816 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) [2021-10-08 17:12:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5217 transitions. [2021-10-08 17:12:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:12:55,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:12:55,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:12:55,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 17:12:56,018 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 [2021-10-08 17:12:56,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:12:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:12:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash 25874, now seen corresponding path program 1 times [2021-10-08 17:12:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:12:56,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137924521] [2021-10-08 17:12:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:12:56,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:12:56,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:12:56,024 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) [2021-10-08 17:12:56,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 17:12:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:12:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:12:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:12:56,312 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:12:56,312 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 [2021-10-08 17:12:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:56,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:12:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:56,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:12:56,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137924521] [2021-10-08 17:12:56,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137924521] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:12:56,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:12:56,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:12:56,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18104430] [2021-10-08 17:12:56,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:12:56,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:12:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:12:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:12:56,966 INFO L87 Difference]: Start difference. First operand 1605 states and 5217 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) [2021-10-08 17:12:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:12:57,175 INFO L93 Difference]: Finished difference Result 1603 states and 5211 transitions. [2021-10-08 17:12:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:12:57,208 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 [2021-10-08 17:12:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:12:57,225 INFO L225 Difference]: With dead ends: 1603 [2021-10-08 17:12:57,225 INFO L226 Difference]: Without dead ends: 1603 [2021-10-08 17:12:57,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:12:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-10-08 17:12:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2021-10-08 17:12:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1452 states have (on average 3.5888429752066116) internal successors, (5211), 1602 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:12:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5211 transitions. [2021-10-08 17:12:57,298 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5211 transitions. Word has length 2 [2021-10-08 17:12:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:12:57,298 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5211 transitions. [2021-10-08 17:12:57,299 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) [2021-10-08 17:12:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5211 transitions. [2021-10-08 17:12:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:12:57,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:12:57,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:12:57,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 17:12:57,511 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 [2021-10-08 17:12:57,512 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:12:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:12:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash 26053, now seen corresponding path program 1 times [2021-10-08 17:12:57,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:12:57,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602884989] [2021-10-08 17:12:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:12:57,516 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:12:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:12:57,517 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) [2021-10-08 17:12:57,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 17:12:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:12:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 17:12:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:12:57,883 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:12:57,884 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 30 treesize of output 80 [2021-10-08 17:12:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:57,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:12:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:12:58,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:12:58,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602884989] [2021-10-08 17:12:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602884989] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:12:58,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:12:58,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:12:58,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321635424] [2021-10-08 17:12:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:12:58,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:12:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:12:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:12:58,016 INFO L87 Difference]: Start difference. First operand 1603 states and 5211 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) [2021-10-08 17:12:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:12:58,250 INFO L93 Difference]: Finished difference Result 1602 states and 5208 transitions. [2021-10-08 17:12:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:12:58,251 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 [2021-10-08 17:12:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:12:58,268 INFO L225 Difference]: With dead ends: 1602 [2021-10-08 17:12:58,268 INFO L226 Difference]: Without dead ends: 1602 [2021-10-08 17:12:58,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:12:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-10-08 17:12:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1602. [2021-10-08 17:12:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1452 states have (on average 3.5867768595041323) internal successors, (5208), 1601 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:12:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 5208 transitions. [2021-10-08 17:12:58,337 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 5208 transitions. Word has length 2 [2021-10-08 17:12:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:12:58,338 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 5208 transitions. [2021-10-08 17:12:58,338 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) [2021-10-08 17:12:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 5208 transitions. [2021-10-08 17:12:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:12:58,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:12:58,339 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:12:58,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-08 17:12:58,551 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 [2021-10-08 17:12:58,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:12:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:12:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash 807309, now seen corresponding path program 1 times [2021-10-08 17:12:58,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:12:58,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214216491] [2021-10-08 17:12:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:12:58,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:12:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:12:58,556 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) [2021-10-08 17:12:58,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 17:12:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:12:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:12:58,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:12:58,905 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-08 17:12:58,906 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 613 treesize of output 622 [2021-10-08 17:13:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:05,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:05,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214216491] [2021-10-08 17:13:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214216491] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:05,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:05,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:05,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211897691] [2021-10-08 17:13:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:05,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:05,340 INFO L87 Difference]: Start difference. First operand 1602 states and 5208 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:05,699 INFO L93 Difference]: Finished difference Result 1359 states and 4315 transitions. [2021-10-08 17:13:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 3 [2021-10-08 17:13:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:05,715 INFO L225 Difference]: With dead ends: 1359 [2021-10-08 17:13:05,715 INFO L226 Difference]: Without dead ends: 1359 [2021-10-08 17:13:05,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-10-08 17:13:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1359. [2021-10-08 17:13:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1235 states have (on average 3.493927125506073) internal successors, (4315), 1358 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4315 transitions. [2021-10-08 17:13:05,775 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4315 transitions. Word has length 3 [2021-10-08 17:13:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:05,775 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 4315 transitions. [2021-10-08 17:13:05,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4315 transitions. [2021-10-08 17:13:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:13:05,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:05,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:13:05,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:05,991 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 [2021-10-08 17:13:05,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 807310, now seen corresponding path program 1 times [2021-10-08 17:13:05,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:05,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085635934] [2021-10-08 17:13:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:05,994 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:05,995 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) [2021-10-08 17:13:06,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 17:13:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:13:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:06,454 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 17:13:06,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 109 [2021-10-08 17:13:06,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 17:13:06,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 280 [2021-10-08 17:13:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:10,700 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:10,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085635934] [2021-10-08 17:13:10,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085635934] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:10,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:10,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:10,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470839611] [2021-10-08 17:13:10,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:10,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:10,703 INFO L87 Difference]: Start difference. First operand 1359 states and 4315 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:11,042 INFO L93 Difference]: Finished difference Result 1116 states and 3422 transitions. [2021-10-08 17:13:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 3 [2021-10-08 17:13:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:11,054 INFO L225 Difference]: With dead ends: 1116 [2021-10-08 17:13:11,054 INFO L226 Difference]: Without dead ends: 1116 [2021-10-08 17:13:11,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-08 17:13:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1116. [2021-10-08 17:13:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1018 states have (on average 3.361493123772102) internal successors, (3422), 1115 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3422 transitions. [2021-10-08 17:13:11,106 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3422 transitions. Word has length 3 [2021-10-08 17:13:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:11,107 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3422 transitions. [2021-10-08 17:13:11,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3422 transitions. [2021-10-08 17:13:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:13:11,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:11,108 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 17:13:11,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:11,322 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 [2021-10-08 17:13:11,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:11,324 INFO L82 PathProgramCache]: Analyzing trace with hash 25025265, now seen corresponding path program 1 times [2021-10-08 17:13:11,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:11,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25362198] [2021-10-08 17:13:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:11,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:11,327 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) [2021-10-08 17:13:11,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 17:13:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:13:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:13:11,748 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:13:11,749 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 [2021-10-08 17:13:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:11,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:12,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:12,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25362198] [2021-10-08 17:13:12,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25362198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:12,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:13:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423716175] [2021-10-08 17:13:12,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:13:12,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:13:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:13:12,334 INFO L87 Difference]: Start difference. First operand 1116 states and 3422 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) [2021-10-08 17:13:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:14,120 INFO L93 Difference]: Finished difference Result 4453 states and 13675 transitions. [2021-10-08 17:13:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:13:14,122 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 [2021-10-08 17:13:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:14,161 INFO L225 Difference]: With dead ends: 4453 [2021-10-08 17:13:14,161 INFO L226 Difference]: Without dead ends: 4453 [2021-10-08 17:13:14,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:13:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-10-08 17:13:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 1120. [2021-10-08 17:13:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1022 states have (on average 3.356164383561644) internal successors, (3430), 1119 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3430 transitions. [2021-10-08 17:13:14,243 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3430 transitions. Word has length 4 [2021-10-08 17:13:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:14,243 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3430 transitions. [2021-10-08 17:13:14,243 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) [2021-10-08 17:13:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3430 transitions. [2021-10-08 17:13:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:14,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:14,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:14,457 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 [2021-10-08 17:13:14,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:14,459 INFO L82 PathProgramCache]: Analyzing trace with hash 775843588, now seen corresponding path program 1 times [2021-10-08 17:13:14,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:14,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307926066] [2021-10-08 17:13:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:14,461 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:14,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:14,462 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) [2021-10-08 17:13:14,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 17:13:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:13:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:14,805 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-08 17:13:14,806 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 52 treesize of output 96 [2021-10-08 17:13:14,811 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 123 treesize of output 121 [2021-10-08 17:13:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:22,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:22,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307926066] [2021-10-08 17:13:22,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307926066] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:22,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:22,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:22,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419387207] [2021-10-08 17:13:22,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:22,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:22,342 INFO L87 Difference]: Start difference. First operand 1120 states and 3430 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-08 17:13:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:22,662 INFO L93 Difference]: Finished difference Result 1087 states and 3350 transitions. [2021-10-08 17:13:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-10-08 17:13:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:22,682 INFO L225 Difference]: With dead ends: 1087 [2021-10-08 17:13:22,682 INFO L226 Difference]: Without dead ends: 1087 [2021-10-08 17:13:22,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-10-08 17:13:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2021-10-08 17:13:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 999 states have (on average 3.3533533533533535) internal successors, (3350), 1086 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3350 transitions. [2021-10-08 17:13:22,732 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3350 transitions. Word has length 5 [2021-10-08 17:13:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:22,733 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 3350 transitions. [2021-10-08 17:13:22,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-08 17:13:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3350 transitions. [2021-10-08 17:13:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:22,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:22,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:22,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:22,947 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 [2021-10-08 17:13:22,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash 775843350, now seen corresponding path program 1 times [2021-10-08 17:13:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605666083] [2021-10-08 17:13:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:22,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:22,952 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) [2021-10-08 17:13:22,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 17:13:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:13:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:23,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:23,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:23,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605666083] [2021-10-08 17:13:23,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605666083] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:23,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:23,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 17:13:23,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385294863] [2021-10-08 17:13:23,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:23,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:23,089 INFO L87 Difference]: Start difference. First operand 1087 states and 3350 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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) [2021-10-08 17:13:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:23,222 INFO L93 Difference]: Finished difference Result 749 states and 2316 transitions. [2021-10-08 17:13:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:23,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2021-10-08 17:13:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:23,228 INFO L225 Difference]: With dead ends: 749 [2021-10-08 17:13:23,228 INFO L226 Difference]: Without dead ends: 749 [2021-10-08 17:13:23,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-10-08 17:13:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-10-08 17:13:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 713 states have (on average 3.2482468443197754) internal successors, (2316), 748 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2316 transitions. [2021-10-08 17:13:23,254 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2316 transitions. Word has length 5 [2021-10-08 17:13:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2316 transitions. [2021-10-08 17:13:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2021-10-08 17:13:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2316 transitions. [2021-10-08 17:13:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:23,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:23,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:23,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-08 17:13:23,468 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 [2021-10-08 17:13:23,469 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash 775843590, now seen corresponding path program 1 times [2021-10-08 17:13:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:23,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305065604] [2021-10-08 17:13:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:23,471 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:23,473 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) [2021-10-08 17:13:23,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 17:13:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:13:23,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:23,848 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:13:23,849 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 312 treesize of output 349 [2021-10-08 17:13:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:29,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:29,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:29,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305065604] [2021-10-08 17:13:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305065604] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:29,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598215052] [2021-10-08 17:13:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:29,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:29,933 INFO L87 Difference]: Start difference. First operand 749 states and 2316 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-08 17:13:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:30,082 INFO L93 Difference]: Finished difference Result 722 states and 2250 transitions. [2021-10-08 17:13:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-10-08 17:13:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:30,089 INFO L225 Difference]: With dead ends: 722 [2021-10-08 17:13:30,089 INFO L226 Difference]: Without dead ends: 722 [2021-10-08 17:13:30,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-10-08 17:13:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-10-08 17:13:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 692 states have (on average 3.2514450867052025) internal successors, (2250), 721 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2250 transitions. [2021-10-08 17:13:30,116 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2250 transitions. Word has length 5 [2021-10-08 17:13:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:30,116 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 2250 transitions. [2021-10-08 17:13:30,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-08 17:13:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2250 transitions. [2021-10-08 17:13:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:30,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:30,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:30,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:30,330 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 [2021-10-08 17:13:30,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash 775843351, now seen corresponding path program 1 times [2021-10-08 17:13:30,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:30,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218899616] [2021-10-08 17:13:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:30,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:30,335 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) [2021-10-08 17:13:30,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 17:13:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:13:30,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:30,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:30,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:30,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218899616] [2021-10-08 17:13:30,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218899616] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:30,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:30,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 17:13:30,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237820434] [2021-10-08 17:13:30,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:30,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:30,533 INFO L87 Difference]: Start difference. First operand 722 states and 2250 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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) [2021-10-08 17:13:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:30,678 INFO L93 Difference]: Finished difference Result 580 states and 1812 transitions. [2021-10-08 17:13:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2021-10-08 17:13:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:30,683 INFO L225 Difference]: With dead ends: 580 [2021-10-08 17:13:30,683 INFO L226 Difference]: Without dead ends: 580 [2021-10-08 17:13:30,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-10-08 17:13:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-10-08 17:13:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 565 states have (on average 3.207079646017699) internal successors, (1812), 579 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1812 transitions. [2021-10-08 17:13:30,702 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1812 transitions. Word has length 5 [2021-10-08 17:13:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:30,702 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1812 transitions. [2021-10-08 17:13:30,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2021-10-08 17:13:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1812 transitions. [2021-10-08 17:13:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:13:30,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:30,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:30,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:30,916 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 [2021-10-08 17:13:30,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1738602811, now seen corresponding path program 1 times [2021-10-08 17:13:30,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:30,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175717149] [2021-10-08 17:13:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:30,919 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:30,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:30,921 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) [2021-10-08 17:13:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 17:13:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:13:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:31,258 INFO L354 Elim1Store]: treesize reduction 247, result has 16.6 percent of original size [2021-10-08 17:13:31,259 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 80 [2021-10-08 17:13:31,267 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 634 treesize of output 630 [2021-10-08 17:13:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:32,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:32,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:32,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175717149] [2021-10-08 17:13:32,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175717149] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:32,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:32,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871358461] [2021-10-08 17:13:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:32,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:32,207 INFO L87 Difference]: Start difference. First operand 580 states and 1812 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-08 17:13:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:32,356 INFO L93 Difference]: Finished difference Result 514 states and 1601 transitions. [2021-10-08 17:13:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-10-08 17:13:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:32,360 INFO L225 Difference]: With dead ends: 514 [2021-10-08 17:13:32,360 INFO L226 Difference]: Without dead ends: 514 [2021-10-08 17:13:32,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-08 17:13:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-10-08 17:13:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 504 states have (on average 3.1765873015873014) internal successors, (1601), 513 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1601 transitions. [2021-10-08 17:13:32,377 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1601 transitions. Word has length 7 [2021-10-08 17:13:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:32,378 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1601 transitions. [2021-10-08 17:13:32,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-08 17:13:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1601 transitions. [2021-10-08 17:13:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:13:32,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:32,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:32,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:32,592 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 [2021-10-08 17:13:32,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1738602810, now seen corresponding path program 1 times [2021-10-08 17:13:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:32,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291636490] [2021-10-08 17:13:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:32,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:32,596 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) [2021-10-08 17:13:32,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 17:13:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:13:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:32,945 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:13:32,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-08 17:13:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:33,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:33,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:33,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291636490] [2021-10-08 17:13:33,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291636490] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:33,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:33,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:13:33,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136718153] [2021-10-08 17:13:33,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:33,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:33,456 INFO L87 Difference]: Start difference. First operand 514 states and 1601 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:33,546 INFO L93 Difference]: Finished difference Result 448 states and 1390 transitions. [2021-10-08 17:13:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2021-10-08 17:13:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:33,554 INFO L225 Difference]: With dead ends: 448 [2021-10-08 17:13:33,554 INFO L226 Difference]: Without dead ends: 448 [2021-10-08 17:13:33,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-08 17:13:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2021-10-08 17:13:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 3.1376975169300225) internal successors, (1390), 447 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1390 transitions. [2021-10-08 17:13:33,568 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1390 transitions. Word has length 7 [2021-10-08 17:13:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:33,568 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1390 transitions. [2021-10-08 17:13:33,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1390 transitions. [2021-10-08 17:13:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:13:33,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:33,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:33,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:33,780 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 [2021-10-08 17:13:33,780 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1930784767, now seen corresponding path program 1 times [2021-10-08 17:13:33,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:33,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902524882] [2021-10-08 17:13:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:33,783 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:33,785 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) [2021-10-08 17:13:33,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 17:13:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:33,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:13:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:34,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:34,130 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 32 treesize of output 28 [2021-10-08 17:13:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:34,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:34,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902524882] [2021-10-08 17:13:34,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902524882] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:34,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:34,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 17:13:34,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887613431] [2021-10-08 17:13:34,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:13:34,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:13:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:13:34,292 INFO L87 Difference]: Start difference. First operand 448 states and 1390 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-08 17:13:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:34,816 INFO L93 Difference]: Finished difference Result 686 states and 2148 transitions. [2021-10-08 17:13:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:13:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-10-08 17:13:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:34,820 INFO L225 Difference]: With dead ends: 686 [2021-10-08 17:13:34,820 INFO L226 Difference]: Without dead ends: 686 [2021-10-08 17:13:34,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:13:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-08 17:13:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 498. [2021-10-08 17:13:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 3.334685598377282) internal successors, (1644), 497 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1644 transitions. [2021-10-08 17:13:34,837 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1644 transitions. Word has length 8 [2021-10-08 17:13:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:34,837 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1644 transitions. [2021-10-08 17:13:34,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-08 17:13:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1644 transitions. [2021-10-08 17:13:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:13:34,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:34,839 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 17:13:34,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:35,051 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 [2021-10-08 17:13:35,052 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 293920433, now seen corresponding path program 2 times [2021-10-08 17:13:35,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:35,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097675964] [2021-10-08 17:13:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:13:35,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:35,056 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) [2021-10-08 17:13:35,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 17:13:35,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:13:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:13:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:13:35,447 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:13:35,448 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 [2021-10-08 17:13:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:35,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:37,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:37,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097675964] [2021-10-08 17:13:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097675964] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:37,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 17:13:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200665522] [2021-10-08 17:13:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:13:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:13:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:13:37,300 INFO L87 Difference]: Start difference. First operand 498 states and 1644 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) [2021-10-08 17:13:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:46,134 INFO L93 Difference]: Finished difference Result 5885 states and 19579 transitions. [2021-10-08 17:13:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:13:46,136 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 [2021-10-08 17:13:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:46,163 INFO L225 Difference]: With dead ends: 5885 [2021-10-08 17:13:46,163 INFO L226 Difference]: Without dead ends: 5885 [2021-10-08 17:13:46,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5461.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:13:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-10-08 17:13:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 506. [2021-10-08 17:13:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 3.313373253493014) internal successors, (1660), 505 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1660 transitions. [2021-10-08 17:13:46,244 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1660 transitions. Word has length 8 [2021-10-08 17:13:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:46,244 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1660 transitions. [2021-10-08 17:13:46,245 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) [2021-10-08 17:13:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1660 transitions. [2021-10-08 17:13:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 17:13:46,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:46,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:46,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:46,459 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 [2021-10-08 17:13:46,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash -275209162, now seen corresponding path program 1 times [2021-10-08 17:13:46,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:46,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537063054] [2021-10-08 17:13:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:46,463 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:46,464 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) [2021-10-08 17:13:46,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 17:13:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:13:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:13:46,833 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:13:46,833 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 [2021-10-08 17:13:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:47,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:13:47,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:47,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537063054] [2021-10-08 17:13:47,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537063054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:47,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:47,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:13:47,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926185604] [2021-10-08 17:13:47,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:13:47,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:13:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:13:47,519 INFO L87 Difference]: Start difference. First operand 506 states and 1660 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) [2021-10-08 17:13:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:50,228 INFO L93 Difference]: Finished difference Result 1156 states and 3682 transitions. [2021-10-08 17:13:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:13:50,230 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 [2021-10-08 17:13:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:50,234 INFO L225 Difference]: With dead ends: 1156 [2021-10-08 17:13:50,234 INFO L226 Difference]: Without dead ends: 1156 [2021-10-08 17:13:50,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:13:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-08 17:13:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 964. [2021-10-08 17:13:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 959 states have (on average 3.4098018769551617) internal successors, (3270), 963 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3270 transitions. [2021-10-08 17:13:50,269 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3270 transitions. Word has length 9 [2021-10-08 17:13:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:50,269 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3270 transitions. [2021-10-08 17:13:50,270 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) [2021-10-08 17:13:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3270 transitions. [2021-10-08 17:13:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:13:50,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:50,272 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:50,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:50,485 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 [2021-10-08 17:13:50,486 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 341591487, now seen corresponding path program 2 times [2021-10-08 17:13:50,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:50,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672577509] [2021-10-08 17:13:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:13:50,487 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:50,489 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) [2021-10-08 17:13:50,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 17:13:50,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:13:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:50,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:13:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:13:50,907 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:13:50,908 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 [2021-10-08 17:13:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 17:13:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 17:13:52,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:52,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672577509] [2021-10-08 17:13:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672577509] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:52,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:52,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:13:52,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967122599] [2021-10-08 17:13:52,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:13:52,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:13:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:13:52,268 INFO L87 Difference]: Start difference. First operand 964 states and 3270 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:52,485 INFO L93 Difference]: Finished difference Result 862 states and 2932 transitions. [2021-10-08 17:13:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:13:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:13:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:52,489 INFO L225 Difference]: With dead ends: 862 [2021-10-08 17:13:52,489 INFO L226 Difference]: Without dead ends: 862 [2021-10-08 17:13:52,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:13:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-10-08 17:13:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 404. [2021-10-08 17:13:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 3.208955223880597) internal successors, (1290), 403 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1290 transitions. [2021-10-08 17:13:52,506 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1290 transitions. Word has length 12 [2021-10-08 17:13:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:52,506 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1290 transitions. [2021-10-08 17:13:52,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1290 transitions. [2021-10-08 17:13:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:13:52,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:52,510 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 17:13:52,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:52,723 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 [2021-10-08 17:13:52,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:13:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash 344671793, now seen corresponding path program 3 times [2021-10-08 17:13:52,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:52,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081686067] [2021-10-08 17:13:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:13:52,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:52,727 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) [2021-10-08 17:13:52,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 17:13:53,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 17:13:53,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:13:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:13:53,367 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:13:53,368 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 [2021-10-08 17:13:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:54,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:59,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:59,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081686067] [2021-10-08 17:13:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081686067] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:59,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 17:13:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47971742] [2021-10-08 17:13:59,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 17:13:59,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 17:13:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:13:59,452 INFO L87 Difference]: Start difference. First operand 404 states and 1290 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) [2021-10-08 17:14:14,820 WARN L207 SmtUtils]: Spent 11.34 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 17:14:23,621 WARN L207 SmtUtils]: Spent 7.82 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-08 17:14:32,453 WARN L207 SmtUtils]: Spent 7.81 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 17:14:39,524 WARN L207 SmtUtils]: Spent 5.85 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-08 17:15:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:10,203 INFO L93 Difference]: Finished difference Result 10869 states and 35315 transitions. [2021-10-08 17:15:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 17:15:10,205 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 [2021-10-08 17:15:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:10,250 INFO L225 Difference]: With dead ends: 10869 [2021-10-08 17:15:10,250 INFO L226 Difference]: Without dead ends: 10869 [2021-10-08 17:15:10,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 59533.0ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 17:15:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2021-10-08 17:15:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 420. [2021-10-08 17:15:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 3.1626794258373208) internal successors, (1322), 419 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1322 transitions. [2021-10-08 17:15:10,387 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1322 transitions. Word has length 16 [2021-10-08 17:15:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:10,387 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1322 transitions. [2021-10-08 17:15:10,388 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) [2021-10-08 17:15:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1322 transitions. [2021-10-08 17:15:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-08 17:15:10,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:10,390 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, 1, 1] [2021-10-08 17:15:10,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:10,605 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 [2021-10-08 17:15:10,605 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:15:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 927905515, now seen corresponding path program 1 times [2021-10-08 17:15:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:10,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040008841] [2021-10-08 17:15:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:15:10,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:10,609 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) [2021-10-08 17:15:10,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 17:15:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:15:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:15:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:10,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:11,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:11,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040008841] [2021-10-08 17:15:11,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040008841] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:15:11,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:15:11,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:15:11,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717835707] [2021-10-08 17:15:11,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:15:11,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:15:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:15:11,020 INFO L87 Difference]: Start difference. First operand 420 states and 1322 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:11,172 INFO L93 Difference]: Finished difference Result 541 states and 1659 transitions. [2021-10-08 17:15:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:15:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 25 [2021-10-08 17:15:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:11,175 INFO L225 Difference]: With dead ends: 541 [2021-10-08 17:15:11,175 INFO L226 Difference]: Without dead ends: 412 [2021-10-08 17:15:11,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:15:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-08 17:15:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-10-08 17:15:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 3.15609756097561) internal successors, (1294), 411 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1294 transitions. [2021-10-08 17:15:11,189 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1294 transitions. Word has length 25 [2021-10-08 17:15:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:11,189 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1294 transitions. [2021-10-08 17:15:11,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1294 transitions. [2021-10-08 17:15:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-08 17:15:11,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:11,192 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, 1, 1] [2021-10-08 17:15:11,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:11,405 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 [2021-10-08 17:15:11,406 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:15:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash 689012399, now seen corresponding path program 2 times [2021-10-08 17:15:11,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:11,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261107045] [2021-10-08 17:15:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:15:11,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:11,410 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) [2021-10-08 17:15:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 17:15:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:15:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 17:15:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:11,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:11,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:11,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261107045] [2021-10-08 17:15:11,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261107045] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:15:11,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:15:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:15:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878391501] [2021-10-08 17:15:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:15:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:15:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:15:11,907 INFO L87 Difference]: Start difference. First operand 412 states and 1294 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:12,029 INFO L93 Difference]: Finished difference Result 463 states and 1441 transitions. [2021-10-08 17:15:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:15:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 25 [2021-10-08 17:15:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:12,031 INFO L225 Difference]: With dead ends: 463 [2021-10-08 17:15:12,031 INFO L226 Difference]: Without dead ends: 342 [2021-10-08 17:15:12,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:15:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-08 17:15:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2021-10-08 17:15:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 340 states have (on average 3.041176470588235) internal successors, (1034), 341 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1034 transitions. [2021-10-08 17:15:12,043 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1034 transitions. Word has length 25 [2021-10-08 17:15:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:12,044 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1034 transitions. [2021-10-08 17:15:12,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1034 transitions. [2021-10-08 17:15:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-08 17:15:12,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:12,046 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, 1, 1] [2021-10-08 17:15:12,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:12,263 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 [2021-10-08 17:15:12,263 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:15:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1540034215, now seen corresponding path program 3 times [2021-10-08 17:15:12,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:12,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682601925] [2021-10-08 17:15:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:15:12,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:12,267 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) [2021-10-08 17:15:12,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 17:15:12,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-08 17:15:12,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:15:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:12,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:15:12,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:12,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682601925] [2021-10-08 17:15:12,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682601925] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:15:12,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:15:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:15:12,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928002718] [2021-10-08 17:15:12,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:15:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:15:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:15:12,837 INFO L87 Difference]: Start difference. First operand 342 states and 1034 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:12,970 INFO L93 Difference]: Finished difference Result 480 states and 1515 transitions. [2021-10-08 17:15:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:15:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 25 [2021-10-08 17:15:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:12,972 INFO L225 Difference]: With dead ends: 480 [2021-10-08 17:15:12,972 INFO L226 Difference]: Without dead ends: 480 [2021-10-08 17:15:12,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:15:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-10-08 17:15:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 388. [2021-10-08 17:15:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 386 states have (on average 3.173575129533679) internal successors, (1225), 387 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1225 transitions. [2021-10-08 17:15:12,987 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1225 transitions. Word has length 25 [2021-10-08 17:15:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:12,987 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1225 transitions. [2021-10-08 17:15:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1225 transitions. [2021-10-08 17:15:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-08 17:15:12,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:12,990 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, 1, 1, 1] [2021-10-08 17:15:13,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:13,203 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 [2021-10-08 17:15:13,204 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:15:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 684014629, now seen corresponding path program 1 times [2021-10-08 17:15:13,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:13,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598154461] [2021-10-08 17:15:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:15:13,206 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:13,207 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) [2021-10-08 17:15:13,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 17:15:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:15:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 17:15:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:13,802 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 17:15:13,803 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 75 treesize of output 31 [2021-10-08 17:15:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:15:13,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:14,272 INFO L354 Elim1Store]: treesize reduction 484, result has 1.4 percent of original size [2021-10-08 17:15:14,272 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 94 treesize of output 31 [2021-10-08 17:15:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:15:14,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:14,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598154461] [2021-10-08 17:15:14,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598154461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:15:14,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:15:14,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:15:14,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325748814] [2021-10-08 17:15:14,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:15:14,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:15:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:15:14,363 INFO L87 Difference]: Start difference. First operand 388 states and 1225 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:19,774 INFO L93 Difference]: Finished difference Result 699 states and 2200 transitions. [2021-10-08 17:15:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:15:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 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 26 [2021-10-08 17:15:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:19,777 INFO L225 Difference]: With dead ends: 699 [2021-10-08 17:15:19,777 INFO L226 Difference]: Without dead ends: 656 [2021-10-08 17:15:19,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:15:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-08 17:15:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 444. [2021-10-08 17:15:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 442 states have (on average 3.183257918552036) internal successors, (1407), 443 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1407 transitions. [2021-10-08 17:15:19,794 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1407 transitions. Word has length 26 [2021-10-08 17:15:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1407 transitions. [2021-10-08 17:15:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1407 transitions. [2021-10-08 17:15:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-08 17:15:19,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:19,797 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, 1, 1, 1] [2021-10-08 17:15:19,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:20,010 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 [2021-10-08 17:15:20,011 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 41 more)] === [2021-10-08 17:15:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash 366724315, now seen corresponding path program 2 times [2021-10-08 17:15:20,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:20,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494016108] [2021-10-08 17:15:20,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:15:20,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:20,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:20,014 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) [2021-10-08 17:15:20,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 17:15:20,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:15:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:15:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:20,485 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-08 17:15:20,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 39 [2021-10-08 17:20:43,232 WARN L207 SmtUtils]: Spent 5.31 m on a formula simplification. DAG size of input: 371 DAG size of output: 159 [2021-10-08 17:20:43,235 INFO L354 Elim1Store]: treesize reduction 1634, result has 24.1 percent of original size [2021-10-08 17:20:43,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 106 treesize of output 559 [2021-10-08 17:23:34,688 WARN L228 Executor]: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-08 17:23:34,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-08 17:23:34,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:23:34,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494016108] [2021-10-08 17:23:34,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-08 17:23:34,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661871877] [2021-10-08 17:23:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:23:34,692 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 17:23:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 17:23:34,694 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 17:23:34,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-08 17:23:35,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:23:35,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:23:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 17:23:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:23:35,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-08 17:23:35,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557184186] [2021-10-08 17:23:35,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:23:35,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:23:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:23:35,674 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 17:23:35,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-08 17:23:36,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:23:36,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:23:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 17:23:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:23:36,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-08 17:23:36,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:23:36,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-08 17:23:36,101 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-08 17:23:36,101 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-08 17:23:36,106 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:23:36,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:23:36,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:23:36,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:23:36,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:23:36,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 17:23:36,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 17:23:36,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-08 17:23:36,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:23:36,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:23:36,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 17:23:36,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 17:23:36,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-08 17:23:36,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:23:36,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-08 17:23:36,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:23:36,724 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 17:23:36,724 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 17:23:36,726 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-08 17:23:36,728 INFO L168 Benchmark]: Toolchain (without parser) took 680176.81 ms. Allocated memory was 172.0 MB in the beginning and 209.7 MB in the end (delta: 37.7 MB). Free memory was 146.4 MB in the beginning and 156.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,728 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 172.0 MB. Free memory is still 145.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 17:23:36,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.91 ms. Allocated memory is still 172.0 MB. Free memory was 146.0 MB in the beginning and 132.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,729 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.36 ms. Allocated memory is still 172.0 MB. Free memory was 132.5 MB in the beginning and 130.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,729 INFO L168 Benchmark]: Boogie Preprocessor took 83.80 ms. Allocated memory is still 172.0 MB. Free memory was 130.6 MB in the beginning and 128.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,730 INFO L168 Benchmark]: RCFGBuilder took 991.05 ms. Allocated memory is still 172.0 MB. Free memory was 128.7 MB in the beginning and 140.1 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,730 INFO L168 Benchmark]: TraceAbstraction took 678435.25 ms. Allocated memory was 172.0 MB in the beginning and 209.7 MB in the end (delta: 37.7 MB). Free memory was 139.6 MB in the beginning and 156.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:23:36,732 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 172.0 MB. Free memory is still 145.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 553.91 ms. Allocated memory is still 172.0 MB. Free memory was 146.0 MB in the beginning and 132.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 94.36 ms. Allocated memory is still 172.0 MB. Free memory was 132.5 MB in the beginning and 130.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.80 ms. Allocated memory is still 172.0 MB. Free memory was 130.6 MB in the beginning and 128.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 991.05 ms. Allocated memory is still 172.0 MB. Free memory was 128.7 MB in the beginning and 140.1 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 678435.25 ms. Allocated memory was 172.0 MB in the beginning and 209.7 MB in the end (delta: 37.7 MB). Free memory was 139.6 MB in the beginning and 156.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 35176.8ms, 210 PlacesBefore, 70 PlacesAfterwards, 215 TransitionsBefore, 65 TransitionsAfterwards, 3782 CoEnabledTransitionPairs, 7 FixpointIterations, 119 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 15 ConcurrentYvCompositions, 10 ChoiceCompositions, 232 TotalNumberOfCompositions, 8722 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6098, positive: 5938, positive conditional: 0, positive unconditional: 5938, negative: 160, negative conditional: 0, negative unconditional: 160, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2582, positive: 2526, positive conditional: 0, positive unconditional: 2526, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2582, positive: 2521, positive conditional: 0, positive unconditional: 2521, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 61, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2088, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 2080, negative conditional: 0, negative unconditional: 2080, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6098, positive: 3412, positive conditional: 0, positive unconditional: 3412, negative: 104, negative conditional: 0, negative unconditional: 104, unknown: 2582, unknown conditional: 0, unknown unconditional: 2582] , Statistics on independence cache: Total cache size (in pairs): 403, Positive cache size: 385, Positive conditional cache size: 0, Positive unconditional cache size: 385, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - 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 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...