/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/mult-flipped-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 20:56:55,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 20:56:55,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 20:56:55,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-06 20:56:55,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-06 20:56:55,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-06 20:56:55,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-06 20:56:55,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-06 20:56:55,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-06 20:56:55,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-06 20:56:55,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-06 20:56:55,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-06 20:56:55,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-06 20:56:55,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-06 20:56:55,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-06 20:56:55,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-06 20:56:55,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-06 20:56:55,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-06 20:56:55,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-06 20:56:55,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-06 20:56:55,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-06 20:56:55,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 20:56:55,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 20:56:55,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 20:56:55,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 20:56:55,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 20:56:55,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 20:56:55,576 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 20:56:55,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 20:56:55,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 20:56:55,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 20:56:55,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 20:56:55,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 20:56:55,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 20:56:55,578 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-06 20:56:55,578 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-06 20:56:55,578 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-06 20:56:55,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 20:56:55,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-06 20:56:55,579 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-06 20:56:55,579 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-06 20:56:55,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 20:56:55,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 20:56:55,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 20:56:55,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 20:56:55,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 20:56:55,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 20:56:55,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 20:56:55,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 20:56:55,581 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-06 20:56:55,581 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-06 20:56:55,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 20:56:55,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-06 20:56:55,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 20:56:56,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 20:56:56,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 20:56:56,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 20:56:56,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 20:56:56,057 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 20:56:56,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2021-10-06 20:56:56,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0a66117/5117ae60e83d4bb691de3df1518a110b/FLAGc184f4afd [2021-10-06 20:56:56,755 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 20:56:56,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2021-10-06 20:56:56,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0a66117/5117ae60e83d4bb691de3df1518a110b/FLAGc184f4afd [2021-10-06 20:56:57,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0a66117/5117ae60e83d4bb691de3df1518a110b [2021-10-06 20:56:57,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 20:56:57,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-06 20:56:57,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 20:56:57,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 20:56:57,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 20:56:57,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d162822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57, skipping insertion in model container [2021-10-06 20:56:57,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 20:56:57,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 20:56:57,460 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/mult-flipped-dist.wvr.c[2034,2047] [2021-10-06 20:56:57,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 20:56:57,488 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 20:56:57,513 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/mult-flipped-dist.wvr.c[2034,2047] [2021-10-06 20:56:57,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 20:56:57,533 INFO L208 MainTranslator]: Completed translation [2021-10-06 20:56:57,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57 WrapperNode [2021-10-06 20:56:57,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 20:56:57,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 20:56:57,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 20:56:57,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 20:56:57,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 20:56:57,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 20:56:57,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 20:56:57,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 20:56:57,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 20:56:57,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 20:56:57,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 20:56:57,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 20:56:57,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (1/1) ... [2021-10-06 20:56:57,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 20:56:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 20:56:57,701 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) [2021-10-06 20:56:57,715 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 [2021-10-06 20:56:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 20:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 20:56:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 20:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 20:56:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-06 20:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-06 20:56:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-06 20:56:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 20:56:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-06 20:56:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 20:56:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 20:56:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 20:56:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-06 20:56:57,774 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-06 20:56:58,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 20:56:58,372 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-06 20:56:58,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 08:56:58 BoogieIcfgContainer [2021-10-06 20:56:58,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 20:56:58,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 20:56:58,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 20:56:58,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 20:56:58,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 08:56:57" (1/3) ... [2021-10-06 20:56:58,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b62dc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 08:56:58, skipping insertion in model container [2021-10-06 20:56:58,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 08:56:57" (2/3) ... [2021-10-06 20:56:58,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b62dc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 08:56:58, skipping insertion in model container [2021-10-06 20:56:58,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 08:56:58" (3/3) ... [2021-10-06 20:56:58,391 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2021-10-06 20:56:58,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 20:56:58,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-10-06 20:56:58,403 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 20:56:58,457 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,458 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,458 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,460 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,460 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,460 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,461 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,461 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,463 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,463 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,465 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,465 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,466 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,466 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,466 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,466 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,468 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,468 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,468 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,468 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,469 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,469 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,470 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,470 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,470 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,471 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,472 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,473 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,473 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,473 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,473 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,474 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,475 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,475 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,476 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,476 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,483 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,490 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,491 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,491 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,491 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,494 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,495 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 20:56:58,517 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-06 20:56:58,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 20:56:58,585 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 [2021-10-06 20:56:58,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-06 20:56:58,601 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 20:56:58,614 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 111 transitions, 246 flow [2021-10-06 20:56:58,617 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 111 transitions, 246 flow [2021-10-06 20:56:58,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 111 transitions, 246 flow [2021-10-06 20:56:58,674 INFO L129 PetriNetUnfolder]: 7/108 cut-off events. [2021-10-06 20:56:58,674 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-06 20:56:58,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 7/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2021-10-06 20:56:58,687 INFO L116 LiptonReduction]: Number of co-enabled transitions 1458 [2021-10-06 20:57:10,325 INFO L131 LiptonReduction]: Checked pairs total: 1565 [2021-10-06 20:57:10,326 INFO L133 LiptonReduction]: Total number of compositions: 107 [2021-10-06 20:57:10,336 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 102 flow [2021-10-06 20:57:10,364 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-06 20:57:10,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:10,375 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-06 20:57:10,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 420, now seen corresponding path program 1 times [2021-10-06 20:57:10,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:10,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836786644] [2021-10-06 20:57:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:10,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:10,401 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) [2021-10-06 20:57:10,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-06 20:57:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-06 20:57:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:10,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:10,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:10,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836786644] [2021-10-06 20:57:10,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836786644] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:10,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:10,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-06 20:57:10,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269227592] [2021-10-06 20:57:10,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-06 20:57:10,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-06 20:57:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 20:57:10,520 INFO L87 Difference]: Start difference. First operand has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:10,549 INFO L93 Difference]: Finished difference Result 208 states and 673 transitions. [2021-10-06 20:57:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-06 20:57:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2021-10-06 20:57:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:10,571 INFO L225 Difference]: With dead ends: 208 [2021-10-06 20:57:10,572 INFO L226 Difference]: Without dead ends: 208 [2021-10-06 20:57:10,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 20:57:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-06 20:57:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-10-06 20:57:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 197 states have (on average 3.416243654822335) internal successors, (673), 207 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 673 transitions. [2021-10-06 20:57:10,635 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 673 transitions. Word has length 1 [2021-10-06 20:57:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:10,636 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 673 transitions. [2021-10-06 20:57:10,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 673 transitions. [2021-10-06 20:57:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 20:57:10,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:10,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 20:57:10,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:10,848 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 [2021-10-06 20:57:10,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 414500, now seen corresponding path program 1 times [2021-10-06 20:57:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:10,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891220413] [2021-10-06 20:57:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:10,853 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:10,854 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) [2021-10-06 20:57:10,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-06 20:57:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 20:57:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:11,322 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-06 20:57:11,323 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 5 case distinctions, treesize of input 167 treesize of output 200 [2021-10-06 20:57:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:14,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:14,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891220413] [2021-10-06 20:57:14,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891220413] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:14,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:14,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 20:57:14,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341360168] [2021-10-06 20:57:14,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 20:57:14,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 20:57:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:14,750 INFO L87 Difference]: Start difference. First operand 208 states and 673 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) [2021-10-06 20:57:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:14,848 INFO L93 Difference]: Finished difference Result 196 states and 640 transitions. [2021-10-06 20:57:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:14,849 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 [2021-10-06 20:57:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:14,854 INFO L225 Difference]: With dead ends: 196 [2021-10-06 20:57:14,857 INFO L226 Difference]: Without dead ends: 196 [2021-10-06 20:57:14,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-06 20:57:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-10-06 20:57:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 187 states have (on average 3.4224598930481283) internal successors, (640), 195 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 640 transitions. [2021-10-06 20:57:14,894 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 640 transitions. Word has length 3 [2021-10-06 20:57:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:14,895 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 640 transitions. [2021-10-06 20:57:14,895 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) [2021-10-06 20:57:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 640 transitions. [2021-10-06 20:57:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 20:57:14,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:14,896 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 20:57:14,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:15,114 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 [2021-10-06 20:57:15,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash 414502, now seen corresponding path program 1 times [2021-10-06 20:57:15,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:15,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393002958] [2021-10-06 20:57:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:15,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:15,119 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) [2021-10-06 20:57:15,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-06 20:57:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:15,324 INFO L354 Elim1Store]: treesize reduction 147, result has 20.5 percent of original size [2021-10-06 20:57:15,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 66 [2021-10-06 20:57:15,333 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 93 treesize of output 91 [2021-10-06 20:57:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:15,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:15,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:15,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393002958] [2021-10-06 20:57:15,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393002958] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:15,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:15,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 20:57:15,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356258097] [2021-10-06 20:57:15,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 20:57:15,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 20:57:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:15,603 INFO L87 Difference]: Start difference. First operand 196 states and 640 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) [2021-10-06 20:57:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:15,654 INFO L93 Difference]: Finished difference Result 184 states and 607 transitions. [2021-10-06 20:57:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:15,655 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 [2021-10-06 20:57:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:15,658 INFO L225 Difference]: With dead ends: 184 [2021-10-06 20:57:15,659 INFO L226 Difference]: Without dead ends: 184 [2021-10-06 20:57:15,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-06 20:57:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-10-06 20:57:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 177 states have (on average 3.4293785310734464) internal successors, (607), 183 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 607 transitions. [2021-10-06 20:57:15,675 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 607 transitions. Word has length 3 [2021-10-06 20:57:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:15,676 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 607 transitions. [2021-10-06 20:57:15,676 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) [2021-10-06 20:57:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 607 transitions. [2021-10-06 20:57:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 20:57:15,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:15,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 20:57:15,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-06 20:57:15,889 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 [2021-10-06 20:57:15,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash 398344546, now seen corresponding path program 1 times [2021-10-06 20:57:15,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:15,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179862168] [2021-10-06 20:57:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:15,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:15,895 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) [2021-10-06 20:57:15,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-06 20:57:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 20:57:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:16,106 INFO L354 Elim1Store]: treesize reduction 141, result has 23.8 percent of original size [2021-10-06 20:57:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 49 [2021-10-06 20:57:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:16,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:16,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:16,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179862168] [2021-10-06 20:57:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179862168] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:16,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:16,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 20:57:16,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458862050] [2021-10-06 20:57:16,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 20:57:16,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 20:57:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:16,297 INFO L87 Difference]: Start difference. First operand 184 states and 607 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) [2021-10-06 20:57:16,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:16,338 INFO L93 Difference]: Finished difference Result 172 states and 574 transitions. [2021-10-06 20:57:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:16,339 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 [2021-10-06 20:57:16,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:16,344 INFO L225 Difference]: With dead ends: 172 [2021-10-06 20:57:16,344 INFO L226 Difference]: Without dead ends: 172 [2021-10-06 20:57:16,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-06 20:57:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-10-06 20:57:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 3.437125748502994) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 574 transitions. [2021-10-06 20:57:16,370 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 574 transitions. Word has length 5 [2021-10-06 20:57:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:16,371 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 574 transitions. [2021-10-06 20:57:16,371 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) [2021-10-06 20:57:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 574 transitions. [2021-10-06 20:57:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 20:57:16,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:16,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 20:57:16,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:16,585 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 [2021-10-06 20:57:16,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash 398344548, now seen corresponding path program 1 times [2021-10-06 20:57:16,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:16,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373410028] [2021-10-06 20:57:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:16,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:16,590 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) [2021-10-06 20:57:16,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-06 20:57:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 20:57:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:16,810 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-06 20:57:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-06 20:57:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:17,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:17,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:17,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373410028] [2021-10-06 20:57:17,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373410028] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:17,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:17,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 20:57:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143427743] [2021-10-06 20:57:17,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 20:57:17,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 20:57:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 20:57:17,210 INFO L87 Difference]: Start difference. First operand 172 states and 574 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-06 20:57:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:17,234 INFO L93 Difference]: Finished difference Result 160 states and 541 transitions. [2021-10-06 20:57:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-10-06 20:57:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:17,237 INFO L225 Difference]: With dead ends: 160 [2021-10-06 20:57:17,237 INFO L226 Difference]: Without dead ends: 160 [2021-10-06 20:57:17,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 20:57:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-06 20:57:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-06 20:57:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 157 states have (on average 3.445859872611465) internal successors, (541), 159 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 541 transitions. [2021-10-06 20:57:17,247 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 541 transitions. Word has length 5 [2021-10-06 20:57:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:17,248 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 541 transitions. [2021-10-06 20:57:17,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-06 20:57:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 541 transitions. [2021-10-06 20:57:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 20:57:17,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:17,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:17,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:17,460 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 [2021-10-06 20:57:17,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 557029329, now seen corresponding path program 1 times [2021-10-06 20:57:17,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:17,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575978669] [2021-10-06 20:57:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:17,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:17,466 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) [2021-10-06 20:57:17,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-06 20:57:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 20:57:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:17,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:17,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:17,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575978669] [2021-10-06 20:57:17,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575978669] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:17,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:17,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 20:57:17,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335511263] [2021-10-06 20:57:17,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 20:57:17,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 20:57:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 20:57:17,706 INFO L87 Difference]: Start difference. First operand 160 states and 541 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) [2021-10-06 20:57:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:17,737 INFO L93 Difference]: Finished difference Result 133 states and 433 transitions. [2021-10-06 20:57:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:17,739 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 [2021-10-06 20:57:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:17,740 INFO L225 Difference]: With dead ends: 133 [2021-10-06 20:57:17,741 INFO L226 Difference]: Without dead ends: 133 [2021-10-06 20:57:17,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 20:57:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-06 20:57:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-06 20:57:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 3.3053435114503817) internal successors, (433), 132 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 433 transitions. [2021-10-06 20:57:17,748 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 433 transitions. Word has length 7 [2021-10-06 20:57:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:17,749 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 433 transitions. [2021-10-06 20:57:17,749 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) [2021-10-06 20:57:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 433 transitions. [2021-10-06 20:57:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 20:57:17,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:17,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:17,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:17,970 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 [2021-10-06 20:57:17,974 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 557029330, now seen corresponding path program 1 times [2021-10-06 20:57:17,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:17,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575829488] [2021-10-06 20:57:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:17,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:17,977 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) [2021-10-06 20:57:18,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-06 20:57:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:18,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 20:57:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:18,238 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-06 20:57:18,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-06 20:57:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:18,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:18,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:18,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575829488] [2021-10-06 20:57:18,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575829488] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:18,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:18,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-06 20:57:18,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792235123] [2021-10-06 20:57:18,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 20:57:18,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 20:57:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 20:57:18,652 INFO L87 Difference]: Start difference. First operand 133 states and 433 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-06 20:57:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:18,681 INFO L93 Difference]: Finished difference Result 106 states and 325 transitions. [2021-10-06 20:57:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 7 [2021-10-06 20:57:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:18,683 INFO L225 Difference]: With dead ends: 106 [2021-10-06 20:57:18,683 INFO L226 Difference]: Without dead ends: 106 [2021-10-06 20:57:18,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 20:57:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-06 20:57:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-06 20:57:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 325 transitions. [2021-10-06 20:57:18,689 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 325 transitions. Word has length 7 [2021-10-06 20:57:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:18,689 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 325 transitions. [2021-10-06 20:57:18,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-06 20:57:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 325 transitions. [2021-10-06 20:57:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 20:57:18,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:18,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:18,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:18,904 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 [2021-10-06 20:57:18,905 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:18,906 INFO L82 PathProgramCache]: Analyzing trace with hash -933029340, now seen corresponding path program 1 times [2021-10-06 20:57:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:18,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103562800] [2021-10-06 20:57:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:18,907 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:18,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:18,908 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) [2021-10-06 20:57:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-06 20:57:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:19,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:19,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:19,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103562800] [2021-10-06 20:57:19,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103562800] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:19,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:19,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 20:57:19,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549419961] [2021-10-06 20:57:19,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 20:57:19,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 20:57:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:19,281 INFO L87 Difference]: Start difference. First operand 106 states and 325 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:19,306 INFO L93 Difference]: Finished difference Result 203 states and 630 transitions. [2021-10-06 20:57:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 20:57:19,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-06 20:57:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:19,309 INFO L225 Difference]: With dead ends: 203 [2021-10-06 20:57:19,310 INFO L226 Difference]: Without dead ends: 196 [2021-10-06 20:57:19,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 20:57:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-06 20:57:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-10-06 20:57:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 195 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 612 transitions. [2021-10-06 20:57:19,321 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 612 transitions. Word has length 19 [2021-10-06 20:57:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:19,322 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 612 transitions. [2021-10-06 20:57:19,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 612 transitions. [2021-10-06 20:57:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:19,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:19,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:19,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:19,537 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 [2021-10-06 20:57:19,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash -563698121, now seen corresponding path program 1 times [2021-10-06 20:57:19,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:19,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746168933] [2021-10-06 20:57:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:19,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:19,542 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) [2021-10-06 20:57:19,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-06 20:57:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:19,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:19,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:19,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746168933] [2021-10-06 20:57:19,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746168933] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:19,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:19,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:19,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461923359] [2021-10-06 20:57:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:19,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:19,753 INFO L87 Difference]: Start difference. First operand 196 states and 612 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:19,922 INFO L93 Difference]: Finished difference Result 272 states and 852 transitions. [2021-10-06 20:57:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 20:57:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:19,926 INFO L225 Difference]: With dead ends: 272 [2021-10-06 20:57:19,926 INFO L226 Difference]: Without dead ends: 272 [2021-10-06 20:57:19,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-06 20:57:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 216. [2021-10-06 20:57:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.2) internal successors, (688), 215 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 688 transitions. [2021-10-06 20:57:19,938 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 688 transitions. Word has length 20 [2021-10-06 20:57:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:19,938 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 688 transitions. [2021-10-06 20:57:19,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 688 transitions. [2021-10-06 20:57:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:19,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:19,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:19,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-06 20:57:20,153 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 [2021-10-06 20:57:20,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2012043063, now seen corresponding path program 2 times [2021-10-06 20:57:20,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:20,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609880604] [2021-10-06 20:57:20,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:20,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:20,157 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) [2021-10-06 20:57:20,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-06 20:57:20,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:20,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:20,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:20,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:20,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609880604] [2021-10-06 20:57:20,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609880604] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 20:57:20,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 20:57:20,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-06 20:57:20,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776235577] [2021-10-06 20:57:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 20:57:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 20:57:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:20,465 INFO L87 Difference]: Start difference. First operand 216 states and 688 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:20,569 INFO L93 Difference]: Finished difference Result 398 states and 1223 transitions. [2021-10-06 20:57:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 20:57:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:20,574 INFO L225 Difference]: With dead ends: 398 [2021-10-06 20:57:20,574 INFO L226 Difference]: Without dead ends: 398 [2021-10-06 20:57:20,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-06 20:57:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 236. [2021-10-06 20:57:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.353191489361702) internal successors, (788), 235 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 788 transitions. [2021-10-06 20:57:20,589 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 788 transitions. Word has length 20 [2021-10-06 20:57:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:20,589 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 788 transitions. [2021-10-06 20:57:20,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 788 transitions. [2021-10-06 20:57:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:20,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:20,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:20,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:20,806 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 [2021-10-06 20:57:20,806 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:20,807 INFO L82 PathProgramCache]: Analyzing trace with hash -76789127, now seen corresponding path program 3 times [2021-10-06 20:57:20,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:20,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245776355] [2021-10-06 20:57:20,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:20,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:20,810 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) [2021-10-06 20:57:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-06 20:57:20,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:57:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:20,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:20,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:21,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:21,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:21,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245776355] [2021-10-06 20:57:21,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245776355] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:21,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:21,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:21,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038697910] [2021-10-06 20:57:21,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:21,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:21,092 INFO L87 Difference]: Start difference. First operand 236 states and 788 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:21,412 INFO L93 Difference]: Finished difference Result 436 states and 1290 transitions. [2021-10-06 20:57:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 20:57:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:21,416 INFO L225 Difference]: With dead ends: 436 [2021-10-06 20:57:21,417 INFO L226 Difference]: Without dead ends: 428 [2021-10-06 20:57:21,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-06 20:57:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 278. [2021-10-06 20:57:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.2851985559566788) internal successors, (910), 277 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 910 transitions. [2021-10-06 20:57:21,432 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 910 transitions. Word has length 20 [2021-10-06 20:57:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:21,433 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 910 transitions. [2021-10-06 20:57:21,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 910 transitions. [2021-10-06 20:57:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:21,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:21,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:21,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:21,647 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 [2021-10-06 20:57:21,648 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:21,649 INFO L82 PathProgramCache]: Analyzing trace with hash 522709703, now seen corresponding path program 1 times [2021-10-06 20:57:21,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:21,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304044845] [2021-10-06 20:57:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:21,650 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:21,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:21,652 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) [2021-10-06 20:57:21,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-06 20:57:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:21,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:21,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304044845] [2021-10-06 20:57:21,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304044845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:21,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:21,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:21,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985132926] [2021-10-06 20:57:21,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:21,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:21,881 INFO L87 Difference]: Start difference. First operand 278 states and 910 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:22,098 INFO L93 Difference]: Finished difference Result 398 states and 1222 transitions. [2021-10-06 20:57:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:22,103 INFO L225 Difference]: With dead ends: 398 [2021-10-06 20:57:22,103 INFO L226 Difference]: Without dead ends: 374 [2021-10-06 20:57:22,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-06 20:57:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 308. [2021-10-06 20:57:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.228013029315961) internal successors, (991), 307 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 991 transitions. [2021-10-06 20:57:22,124 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 991 transitions. Word has length 20 [2021-10-06 20:57:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:22,124 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 991 transitions. [2021-10-06 20:57:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 991 transitions. [2021-10-06 20:57:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:22,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:22,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:22,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:22,339 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 [2021-10-06 20:57:22,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1525771205, now seen corresponding path program 2 times [2021-10-06 20:57:22,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:22,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342680551] [2021-10-06 20:57:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:22,342 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:22,343 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) [2021-10-06 20:57:22,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-06 20:57:22,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:22,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:22,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:22,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342680551] [2021-10-06 20:57:22,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342680551] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:22,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:22,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:22,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376726868] [2021-10-06 20:57:22,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:22,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:22,772 INFO L87 Difference]: Start difference. First operand 308 states and 991 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-10-06 20:57:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:23,188 INFO L93 Difference]: Finished difference Result 710 states and 2183 transitions. [2021-10-06 20:57:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 20 [2021-10-06 20:57:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:23,195 INFO L225 Difference]: With dead ends: 710 [2021-10-06 20:57:23,195 INFO L226 Difference]: Without dead ends: 694 [2021-10-06 20:57:23,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-06 20:57:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 408. [2021-10-06 20:57:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.515970515970516) internal successors, (1431), 407 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1431 transitions. [2021-10-06 20:57:23,220 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1431 transitions. Word has length 20 [2021-10-06 20:57:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:23,220 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1431 transitions. [2021-10-06 20:57:23,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-10-06 20:57:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1431 transitions. [2021-10-06 20:57:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:23,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:23,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:23,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-06 20:57:23,435 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 [2021-10-06 20:57:23,436 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash 753378275, now seen corresponding path program 3 times [2021-10-06 20:57:23,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:23,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424186012] [2021-10-06 20:57:23,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:23,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:23,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:23,439 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) [2021-10-06 20:57:23,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-06 20:57:23,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:57:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:23,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:23,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:23,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424186012] [2021-10-06 20:57:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424186012] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:23,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:23,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:23,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737116103] [2021-10-06 20:57:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:23,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:23,787 INFO L87 Difference]: Start difference. First operand 408 states and 1431 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:24,060 INFO L93 Difference]: Finished difference Result 696 states and 2289 transitions. [2021-10-06 20:57:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:24,068 INFO L225 Difference]: With dead ends: 696 [2021-10-06 20:57:24,068 INFO L226 Difference]: Without dead ends: 682 [2021-10-06 20:57:24,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-10-06 20:57:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 472. [2021-10-06 20:57:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.6454352441613587) internal successors, (1717), 471 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1717 transitions. [2021-10-06 20:57:24,096 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1717 transitions. Word has length 20 [2021-10-06 20:57:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1717 transitions. [2021-10-06 20:57:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1717 transitions. [2021-10-06 20:57:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:24,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:24,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:24,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-06 20:57:24,311 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 [2021-10-06 20:57:24,312 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 331131213, now seen corresponding path program 4 times [2021-10-06 20:57:24,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:24,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266957638] [2021-10-06 20:57:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:24,315 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:24,316 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) [2021-10-06 20:57:24,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-06 20:57:24,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:24,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:24,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:24,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266957638] [2021-10-06 20:57:24,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266957638] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:24,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:24,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:24,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584803263] [2021-10-06 20:57:24,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:24,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:24,576 INFO L87 Difference]: Start difference. First operand 472 states and 1717 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:24,851 INFO L93 Difference]: Finished difference Result 708 states and 2285 transitions. [2021-10-06 20:57:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:24,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:24,859 INFO L225 Difference]: With dead ends: 708 [2021-10-06 20:57:24,859 INFO L226 Difference]: Without dead ends: 684 [2021-10-06 20:57:24,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-06 20:57:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 476. [2021-10-06 20:57:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.608421052631579) internal successors, (1714), 475 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1714 transitions. [2021-10-06 20:57:24,888 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1714 transitions. Word has length 20 [2021-10-06 20:57:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:24,889 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1714 transitions. [2021-10-06 20:57:24,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1714 transitions. [2021-10-06 20:57:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:24,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:24,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:24,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-06 20:57:25,105 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 [2021-10-06 20:57:25,105 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash -739717185, now seen corresponding path program 1 times [2021-10-06 20:57:25,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:25,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629577261] [2021-10-06 20:57:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:25,108 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:25,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:25,109 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) [2021-10-06 20:57:25,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-06 20:57:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:25,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:25,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:25,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629577261] [2021-10-06 20:57:25,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629577261] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:25,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:25,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:25,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338377123] [2021-10-06 20:57:25,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:25,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:25,471 INFO L87 Difference]: Start difference. First operand 476 states and 1714 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:25,841 INFO L93 Difference]: Finished difference Result 872 states and 2856 transitions. [2021-10-06 20:57:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 20:57:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:25,856 INFO L225 Difference]: With dead ends: 872 [2021-10-06 20:57:25,856 INFO L226 Difference]: Without dead ends: 832 [2021-10-06 20:57:25,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-06 20:57:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-06 20:57:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 540. [2021-10-06 20:57:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.693877551020408) internal successors, (1991), 539 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1991 transitions. [2021-10-06 20:57:25,888 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1991 transitions. Word has length 20 [2021-10-06 20:57:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1991 transitions. [2021-10-06 20:57:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1991 transitions. [2021-10-06 20:57:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:25,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:25,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:25,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:26,106 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 [2021-10-06 20:57:26,107 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:26,108 INFO L82 PathProgramCache]: Analyzing trace with hash -516806009, now seen corresponding path program 5 times [2021-10-06 20:57:26,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:26,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440861375] [2021-10-06 20:57:26,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:57:26,109 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:26,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:26,111 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) [2021-10-06 20:57:26,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-06 20:57:26,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:26,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:26,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:26,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440861375] [2021-10-06 20:57:26,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440861375] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:26,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:26,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:26,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667326445] [2021-10-06 20:57:26,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:26,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:26,398 INFO L87 Difference]: Start difference. First operand 540 states and 1991 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:26,559 INFO L93 Difference]: Finished difference Result 684 states and 2392 transitions. [2021-10-06 20:57:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:26,571 INFO L225 Difference]: With dead ends: 684 [2021-10-06 20:57:26,571 INFO L226 Difference]: Without dead ends: 658 [2021-10-06 20:57:26,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-10-06 20:57:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 530. [2021-10-06 20:57:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.7145557655954633) internal successors, (1965), 529 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1965 transitions. [2021-10-06 20:57:26,596 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1965 transitions. Word has length 20 [2021-10-06 20:57:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:26,596 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1965 transitions. [2021-10-06 20:57:26,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1965 transitions. [2021-10-06 20:57:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:26,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:26,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:26,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:26,814 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 [2021-10-06 20:57:26,814 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2100622891, now seen corresponding path program 2 times [2021-10-06 20:57:26,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:26,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69954120] [2021-10-06 20:57:26,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:26,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:26,820 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) [2021-10-06 20:57:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-06 20:57:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:27,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:27,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:27,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69954120] [2021-10-06 20:57:27,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69954120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:27,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:27,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:27,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117733884] [2021-10-06 20:57:27,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:27,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:27,202 INFO L87 Difference]: Start difference. First operand 530 states and 1965 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:27,538 INFO L93 Difference]: Finished difference Result 898 states and 3072 transitions. [2021-10-06 20:57:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:27,546 INFO L225 Difference]: With dead ends: 898 [2021-10-06 20:57:27,546 INFO L226 Difference]: Without dead ends: 848 [2021-10-06 20:57:27,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-06 20:57:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-10-06 20:57:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 516. [2021-10-06 20:57:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.6893203883495147) internal successors, (1900), 515 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1900 transitions. [2021-10-06 20:57:27,574 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1900 transitions. Word has length 20 [2021-10-06 20:57:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:27,574 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1900 transitions. [2021-10-06 20:57:27,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1900 transitions. [2021-10-06 20:57:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:27,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:27,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:27,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:27,790 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 [2021-10-06 20:57:27,790 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -522673465, now seen corresponding path program 3 times [2021-10-06 20:57:27,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:27,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229207892] [2021-10-06 20:57:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:27,792 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:27,793 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) [2021-10-06 20:57:27,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-06 20:57:28,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:57:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:28,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:28,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:28,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:28,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229207892] [2021-10-06 20:57:28,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229207892] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:28,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:28,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:28,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499345364] [2021-10-06 20:57:28,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:28,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:28,161 INFO L87 Difference]: Start difference. First operand 516 states and 1900 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:28,431 INFO L93 Difference]: Finished difference Result 802 states and 2649 transitions. [2021-10-06 20:57:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:28,448 INFO L225 Difference]: With dead ends: 802 [2021-10-06 20:57:28,448 INFO L226 Difference]: Without dead ends: 784 [2021-10-06 20:57:28,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-06 20:57:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 532. [2021-10-06 20:57:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.7043314500941618) internal successors, (1967), 531 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1967 transitions. [2021-10-06 20:57:28,491 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1967 transitions. Word has length 20 [2021-10-06 20:57:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:28,492 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1967 transitions. [2021-10-06 20:57:28,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1967 transitions. [2021-10-06 20:57:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:28,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:28,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:28,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:28,707 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 [2021-10-06 20:57:28,708 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -430842149, now seen corresponding path program 4 times [2021-10-06 20:57:28,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:28,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967314107] [2021-10-06 20:57:28,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:28,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:28,712 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) [2021-10-06 20:57:28,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-06 20:57:28,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:28,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:29,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:29,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:29,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967314107] [2021-10-06 20:57:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967314107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:29,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:29,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473836148] [2021-10-06 20:57:29,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:29,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:29,098 INFO L87 Difference]: Start difference. First operand 532 states and 1967 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:29,410 INFO L93 Difference]: Finished difference Result 962 states and 3150 transitions. [2021-10-06 20:57:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:29,418 INFO L225 Difference]: With dead ends: 962 [2021-10-06 20:57:29,418 INFO L226 Difference]: Without dead ends: 946 [2021-10-06 20:57:29,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-10-06 20:57:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 522. [2021-10-06 20:57:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.6986564299424183) internal successors, (1927), 521 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1927 transitions. [2021-10-06 20:57:29,444 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1927 transitions. Word has length 20 [2021-10-06 20:57:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1927 transitions. [2021-10-06 20:57:29,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1927 transitions. [2021-10-06 20:57:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:29,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:29,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:29,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:29,660 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 [2021-10-06 20:57:29,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1385408683, now seen corresponding path program 5 times [2021-10-06 20:57:29,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:29,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107670215] [2021-10-06 20:57:29,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:57:29,662 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:29,663 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) [2021-10-06 20:57:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-06 20:57:29,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:29,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:29,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:29,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107670215] [2021-10-06 20:57:29,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107670215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:29,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:29,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:29,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465377521] [2021-10-06 20:57:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:29,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:29,935 INFO L87 Difference]: Start difference. First operand 522 states and 1927 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:30,088 INFO L93 Difference]: Finished difference Result 624 states and 2144 transitions. [2021-10-06 20:57:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:30,094 INFO L225 Difference]: With dead ends: 624 [2021-10-06 20:57:30,095 INFO L226 Difference]: Without dead ends: 608 [2021-10-06 20:57:30,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-10-06 20:57:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 508. [2021-10-06 20:57:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.6962524654832345) internal successors, (1874), 507 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1874 transitions. [2021-10-06 20:57:30,115 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1874 transitions. Word has length 20 [2021-10-06 20:57:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:30,116 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1874 transitions. [2021-10-06 20:57:30,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1874 transitions. [2021-10-06 20:57:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:30,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:30,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:30,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:30,330 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 [2021-10-06 20:57:30,331 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1635820289, now seen corresponding path program 4 times [2021-10-06 20:57:30,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:30,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883186139] [2021-10-06 20:57:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:30,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:30,335 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) [2021-10-06 20:57:30,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-06 20:57:30,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:30,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:30,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:30,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883186139] [2021-10-06 20:57:30,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883186139] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:30,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:30,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:30,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997662677] [2021-10-06 20:57:30,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:30,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:30,649 INFO L87 Difference]: Start difference. First operand 508 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:30,758 INFO L93 Difference]: Finished difference Result 696 states and 2377 transitions. [2021-10-06 20:57:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 20:57:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:30,763 INFO L225 Difference]: With dead ends: 696 [2021-10-06 20:57:30,763 INFO L226 Difference]: Without dead ends: 690 [2021-10-06 20:57:30,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-06 20:57:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 504. [2021-10-06 20:57:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.6600397614314115) internal successors, (1841), 503 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1841 transitions. [2021-10-06 20:57:30,783 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1841 transitions. Word has length 20 [2021-10-06 20:57:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:30,784 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1841 transitions. [2021-10-06 20:57:30,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1841 transitions. [2021-10-06 20:57:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:30,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:30,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:30,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:30,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:30,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -453011901, now seen corresponding path program 5 times [2021-10-06 20:57:31,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:31,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639607530] [2021-10-06 20:57:31,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:57:31,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:31,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:31,002 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:31,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-06 20:57:31,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:31,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:31,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:31,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639607530] [2021-10-06 20:57:31,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639607530] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:31,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:31,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:31,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906848346] [2021-10-06 20:57:31,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:31,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:31,291 INFO L87 Difference]: Start difference. First operand 504 states and 1841 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:31,409 INFO L93 Difference]: Finished difference Result 644 states and 2282 transitions. [2021-10-06 20:57:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 20:57:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:31,420 INFO L225 Difference]: With dead ends: 644 [2021-10-06 20:57:31,420 INFO L226 Difference]: Without dead ends: 610 [2021-10-06 20:57:31,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-10-06 20:57:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 488. [2021-10-06 20:57:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.6878850102669403) internal successors, (1796), 487 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1796 transitions. [2021-10-06 20:57:31,439 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1796 transitions. Word has length 20 [2021-10-06 20:57:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:31,440 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1796 transitions. [2021-10-06 20:57:31,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1796 transitions. [2021-10-06 20:57:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:31,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:31,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:31,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:31,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:31,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1315712585, now seen corresponding path program 6 times [2021-10-06 20:57:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:31,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339156418] [2021-10-06 20:57:31,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:57:31,658 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:31,659 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-06 20:57:31,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:57:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:31,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:32,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:32,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339156418] [2021-10-06 20:57:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339156418] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:32,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:32,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 20:57:32,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608896287] [2021-10-06 20:57:32,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:32,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:32,006 INFO L87 Difference]: Start difference. First operand 488 states and 1796 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:32,241 INFO L93 Difference]: Finished difference Result 726 states and 2376 transitions. [2021-10-06 20:57:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:32,246 INFO L225 Difference]: With dead ends: 726 [2021-10-06 20:57:32,246 INFO L226 Difference]: Without dead ends: 706 [2021-10-06 20:57:32,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-10-06 20:57:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 486. [2021-10-06 20:57:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.647422680412371) internal successors, (1769), 485 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1769 transitions. [2021-10-06 20:57:32,265 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1769 transitions. Word has length 20 [2021-10-06 20:57:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:32,265 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1769 transitions. [2021-10-06 20:57:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1769 transitions. [2021-10-06 20:57:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:32,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:32,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:32,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-06 20:57:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:32,481 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash -80212441, now seen corresponding path program 7 times [2021-10-06 20:57:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386896358] [2021-10-06 20:57:32,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:57:32,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:32,486 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:32,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-06 20:57:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:32,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:32,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386896358] [2021-10-06 20:57:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386896358] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:32,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:32,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581619536] [2021-10-06 20:57:32,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:32,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:32,792 INFO L87 Difference]: Start difference. First operand 486 states and 1769 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:32,962 INFO L93 Difference]: Finished difference Result 560 states and 1906 transitions. [2021-10-06 20:57:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:32,965 INFO L225 Difference]: With dead ends: 560 [2021-10-06 20:57:32,966 INFO L226 Difference]: Without dead ends: 524 [2021-10-06 20:57:32,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-06 20:57:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 458. [2021-10-06 20:57:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.700218818380744) internal successors, (1691), 457 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1691 transitions. [2021-10-06 20:57:32,995 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1691 transitions. Word has length 20 [2021-10-06 20:57:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:32,996 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1691 transitions. [2021-10-06 20:57:32,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1691 transitions. [2021-10-06 20:57:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:32,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:32,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:33,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:33,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:33,211 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -161945415, now seen corresponding path program 6 times [2021-10-06 20:57:33,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:33,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196435405] [2021-10-06 20:57:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:57:33,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:33,215 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:33,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-06 20:57:33,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:57:33,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:33,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:33,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:33,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196435405] [2021-10-06 20:57:33,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196435405] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:33,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:33,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:33,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871349729] [2021-10-06 20:57:33,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:33,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:33,653 INFO L87 Difference]: Start difference. First operand 458 states and 1691 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:34,024 INFO L93 Difference]: Finished difference Result 704 states and 2383 transitions. [2021-10-06 20:57:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:34,030 INFO L225 Difference]: With dead ends: 704 [2021-10-06 20:57:34,030 INFO L226 Difference]: Without dead ends: 694 [2021-10-06 20:57:34,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-06 20:57:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 438. [2021-10-06 20:57:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.691075514874142) internal successors, (1613), 437 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1613 transitions. [2021-10-06 20:57:34,048 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1613 transitions. Word has length 20 [2021-10-06 20:57:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:34,048 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1613 transitions. [2021-10-06 20:57:34,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1613 transitions. [2021-10-06 20:57:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:34,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:34,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:34,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-06 20:57:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:34,252 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -345523721, now seen corresponding path program 7 times [2021-10-06 20:57:34,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:34,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381560906] [2021-10-06 20:57:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:57:34,254 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:34,256 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-06 20:57:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 20:57:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:34,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:34,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:34,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381560906] [2021-10-06 20:57:34,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381560906] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 20:57:34,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 20:57:34,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 20:57:34,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692564558] [2021-10-06 20:57:34,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 20:57:34,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 20:57:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 20:57:34,548 INFO L87 Difference]: Start difference. First operand 438 states and 1613 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:34,680 INFO L93 Difference]: Finished difference Result 520 states and 1866 transitions. [2021-10-06 20:57:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 20:57:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:34,686 INFO L225 Difference]: With dead ends: 520 [2021-10-06 20:57:34,686 INFO L226 Difference]: Without dead ends: 512 [2021-10-06 20:57:34,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-06 20:57:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-10-06 20:57:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 428. [2021-10-06 20:57:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.6814988290398127) internal successors, (1572), 427 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1572 transitions. [2021-10-06 20:57:34,716 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1572 transitions. Word has length 20 [2021-10-06 20:57:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:34,717 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1572 transitions. [2021-10-06 20:57:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1572 transitions. [2021-10-06 20:57:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 20:57:34,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:34,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:34,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:34,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:34,933 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1762341011, now seen corresponding path program 8 times [2021-10-06 20:57:34,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:34,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779365101] [2021-10-06 20:57:34,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:34,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:34,936 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-06 20:57:35,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:35,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:35,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:35,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:35,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:35,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779365101] [2021-10-06 20:57:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779365101] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:35,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:35,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:35,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268227736] [2021-10-06 20:57:35,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:35,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:35,388 INFO L87 Difference]: Start difference. First operand 428 states and 1572 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:35,687 INFO L93 Difference]: Finished difference Result 670 states and 2254 transitions. [2021-10-06 20:57:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-06 20:57:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:35,693 INFO L225 Difference]: With dead ends: 670 [2021-10-06 20:57:35,694 INFO L226 Difference]: Without dead ends: 658 [2021-10-06 20:57:35,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:57:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-10-06 20:57:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 340. [2021-10-06 20:57:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.5368731563421827) internal successors, (1199), 339 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1199 transitions. [2021-10-06 20:57:35,708 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1199 transitions. Word has length 20 [2021-10-06 20:57:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:35,708 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1199 transitions. [2021-10-06 20:57:35,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1199 transitions. [2021-10-06 20:57:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 20:57:35,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:35,710 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:35,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-06 20:57:35,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:35,922 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash 889668252, now seen corresponding path program 8 times [2021-10-06 20:57:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:35,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689479640] [2021-10-06 20:57:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:35,925 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:35,926 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:35,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-06 20:57:36,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:36,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:36,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:57:36,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:36,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:36,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:36,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689479640] [2021-10-06 20:57:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689479640] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:36,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-06 20:57:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916785001] [2021-10-06 20:57:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 20:57:36,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 20:57:36,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:36,560 INFO L87 Difference]: Start difference. First operand 340 states and 1199 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:37,473 INFO L93 Difference]: Finished difference Result 946 states and 3242 transitions. [2021-10-06 20:57:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 20:57:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 20:57:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:37,479 INFO L225 Difference]: With dead ends: 946 [2021-10-06 20:57:37,480 INFO L226 Difference]: Without dead ends: 930 [2021-10-06 20:57:37,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-10-06 20:57:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-10-06 20:57:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 434. [2021-10-06 20:57:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.852193995381062) internal successors, (1668), 433 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1668 transitions. [2021-10-06 20:57:37,518 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1668 transitions. Word has length 21 [2021-10-06 20:57:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:37,518 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1668 transitions. [2021-10-06 20:57:37,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1668 transitions. [2021-10-06 20:57:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 20:57:37,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:37,520 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] [2021-10-06 20:57:37,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:37,728 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1107750198, now seen corresponding path program 1 times [2021-10-06 20:57:37,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:37,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012617106] [2021-10-06 20:57:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:37,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:37,731 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:37,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-06 20:57:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:38,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:38,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:38,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012617106] [2021-10-06 20:57:38,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012617106] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:38,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:38,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:38,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852428929] [2021-10-06 20:57:38,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:38,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:38,202 INFO L87 Difference]: Start difference. First operand 434 states and 1668 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:38,425 INFO L93 Difference]: Finished difference Result 686 states and 2525 transitions. [2021-10-06 20:57:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 20:57:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:38,429 INFO L225 Difference]: With dead ends: 686 [2021-10-06 20:57:38,429 INFO L226 Difference]: Without dead ends: 686 [2021-10-06 20:57:38,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-06 20:57:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 442. [2021-10-06 20:57:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.866213151927438) internal successors, (1705), 441 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1705 transitions. [2021-10-06 20:57:38,446 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1705 transitions. Word has length 21 [2021-10-06 20:57:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:38,446 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1705 transitions. [2021-10-06 20:57:38,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1705 transitions. [2021-10-06 20:57:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 20:57:38,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:38,448 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] [2021-10-06 20:57:38,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:38,662 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2066332340, now seen corresponding path program 2 times [2021-10-06 20:57:38,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:38,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679196974] [2021-10-06 20:57:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:38,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:38,664 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:38,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-06 20:57:38,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:38,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:39,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:39,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:39,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679196974] [2021-10-06 20:57:39,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679196974] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:39,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:39,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107917100] [2021-10-06 20:57:39,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:39,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:39,144 INFO L87 Difference]: Start difference. First operand 442 states and 1705 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:39,417 INFO L93 Difference]: Finished difference Result 788 states and 2886 transitions. [2021-10-06 20:57:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:39,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 20:57:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:39,421 INFO L225 Difference]: With dead ends: 788 [2021-10-06 20:57:39,421 INFO L226 Difference]: Without dead ends: 788 [2021-10-06 20:57:39,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:57:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-10-06 20:57:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 432. [2021-10-06 20:57:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.863109048723898) internal successors, (1665), 431 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1665 transitions. [2021-10-06 20:57:39,437 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1665 transitions. Word has length 21 [2021-10-06 20:57:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1665 transitions. [2021-10-06 20:57:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1665 transitions. [2021-10-06 20:57:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 20:57:39,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:39,439 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] [2021-10-06 20:57:39,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:39,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:39,642 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2045837336, now seen corresponding path program 3 times [2021-10-06 20:57:39,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:39,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362502714] [2021-10-06 20:57:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:39,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:39,645 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:39,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-06 20:57:39,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:57:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:39,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:40,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:40,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362502714] [2021-10-06 20:57:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362502714] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:40,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:40,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:40,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818608658] [2021-10-06 20:57:40,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:40,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:40,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:40,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:40,133 INFO L87 Difference]: Start difference. First operand 432 states and 1665 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:40,412 INFO L93 Difference]: Finished difference Result 792 states and 2889 transitions. [2021-10-06 20:57:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 20:57:40,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 21 [2021-10-06 20:57:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:40,416 INFO L225 Difference]: With dead ends: 792 [2021-10-06 20:57:40,416 INFO L226 Difference]: Without dead ends: 792 [2021-10-06 20:57:40,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:57:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-10-06 20:57:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 494. [2021-10-06 20:57:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.969574036511156) internal successors, (1957), 493 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1957 transitions. [2021-10-06 20:57:40,432 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1957 transitions. Word has length 21 [2021-10-06 20:57:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1957 transitions. [2021-10-06 20:57:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1957 transitions. [2021-10-06 20:57:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 20:57:40,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:40,435 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] [2021-10-06 20:57:40,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:40,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:40,649 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2118621198, now seen corresponding path program 4 times [2021-10-06 20:57:40,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:40,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069025673] [2021-10-06 20:57:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:40,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:40,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:40,652 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:40,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-06 20:57:40,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:40,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 20:57:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:40,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:41,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:41,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069025673] [2021-10-06 20:57:41,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069025673] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:41,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:41,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 20:57:41,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021912138] [2021-10-06 20:57:41,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 20:57:41,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 20:57:41,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-06 20:57:41,074 INFO L87 Difference]: Start difference. First operand 494 states and 1957 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:41,277 INFO L93 Difference]: Finished difference Result 752 states and 2790 transitions. [2021-10-06 20:57:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 21 [2021-10-06 20:57:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:41,280 INFO L225 Difference]: With dead ends: 752 [2021-10-06 20:57:41,280 INFO L226 Difference]: Without dead ends: 752 [2021-10-06 20:57:41,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:57:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-06 20:57:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 488. [2021-10-06 20:57:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.9609856262833674) internal successors, (1929), 487 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1929 transitions. [2021-10-06 20:57:41,300 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1929 transitions. Word has length 21 [2021-10-06 20:57:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:41,300 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1929 transitions. [2021-10-06 20:57:41,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1929 transitions. [2021-10-06 20:57:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:41,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:41,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:41,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:41,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:41,516 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1834572915, now seen corresponding path program 1 times [2021-10-06 20:57:41,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:41,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099396652] [2021-10-06 20:57:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 20:57:41,518 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:41,520 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:41,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-06 20:57:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:42,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:42,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099396652] [2021-10-06 20:57:42,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099396652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:42,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:42,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:42,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142278843] [2021-10-06 20:57:42,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:42,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:42,127 INFO L87 Difference]: Start difference. First operand 488 states and 1929 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:42,250 INFO L93 Difference]: Finished difference Result 649 states and 2468 transitions. [2021-10-06 20:57:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:42,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:42,253 INFO L225 Difference]: With dead ends: 649 [2021-10-06 20:57:42,253 INFO L226 Difference]: Without dead ends: 642 [2021-10-06 20:57:42,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-06 20:57:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 568. [2021-10-06 20:57:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.99647266313933) internal successors, (2266), 567 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 2266 transitions. [2021-10-06 20:57:42,272 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 2266 transitions. Word has length 22 [2021-10-06 20:57:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:42,272 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 2266 transitions. [2021-10-06 20:57:42,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 2266 transitions. [2021-10-06 20:57:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:42,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:42,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:42,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:42,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:42,488 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash -167851237, now seen corresponding path program 2 times [2021-10-06 20:57:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:42,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499104295] [2021-10-06 20:57:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:42,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:42,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:42,492 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-06 20:57:42,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:43,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:43,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499104295] [2021-10-06 20:57:43,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499104295] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:43,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:43,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:43,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296993018] [2021-10-06 20:57:43,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:43,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:43,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:43,179 INFO L87 Difference]: Start difference. First operand 568 states and 2266 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:43,314 INFO L93 Difference]: Finished difference Result 745 states and 2877 transitions. [2021-10-06 20:57:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:43,318 INFO L225 Difference]: With dead ends: 745 [2021-10-06 20:57:43,318 INFO L226 Difference]: Without dead ends: 738 [2021-10-06 20:57:43,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-10-06 20:57:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 656. [2021-10-06 20:57:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 4.027480916030535) internal successors, (2638), 655 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2638 transitions. [2021-10-06 20:57:43,338 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2638 transitions. Word has length 22 [2021-10-06 20:57:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:43,339 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2638 transitions. [2021-10-06 20:57:43,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2638 transitions. [2021-10-06 20:57:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:43,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:43,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:43,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:43,563 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:43,564 INFO L82 PathProgramCache]: Analyzing trace with hash -73892889, now seen corresponding path program 3 times [2021-10-06 20:57:43,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:43,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17287767] [2021-10-06 20:57:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:43,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:43,567 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:43,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-06 20:57:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:57:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:44,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:44,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:44,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17287767] [2021-10-06 20:57:44,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17287767] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:44,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:44,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:44,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928731196] [2021-10-06 20:57:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:44,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:44,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:44,251 INFO L87 Difference]: Start difference. First operand 656 states and 2638 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:44,383 INFO L93 Difference]: Finished difference Result 847 states and 3321 transitions. [2021-10-06 20:57:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:44,387 INFO L225 Difference]: With dead ends: 847 [2021-10-06 20:57:44,387 INFO L226 Difference]: Without dead ends: 840 [2021-10-06 20:57:44,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-10-06 20:57:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 726. [2021-10-06 20:57:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 4.102068965517241) internal successors, (2974), 725 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2974 transitions. [2021-10-06 20:57:44,410 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2974 transitions. Word has length 22 [2021-10-06 20:57:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:44,411 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2974 transitions. [2021-10-06 20:57:44,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2974 transitions. [2021-10-06 20:57:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:44,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:44,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:44,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:44,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:44,619 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -362466993, now seen corresponding path program 4 times [2021-10-06 20:57:44,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:44,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74895581] [2021-10-06 20:57:44,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:44,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:44,623 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:44,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-06 20:57:44,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:44,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:45,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:45,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:45,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74895581] [2021-10-06 20:57:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74895581] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:45,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:45,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:45,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604826527] [2021-10-06 20:57:45,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:45,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:45,316 INFO L87 Difference]: Start difference. First operand 726 states and 2974 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:45,531 INFO L93 Difference]: Finished difference Result 919 states and 3667 transitions. [2021-10-06 20:57:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:45,537 INFO L225 Difference]: With dead ends: 919 [2021-10-06 20:57:45,537 INFO L226 Difference]: Without dead ends: 912 [2021-10-06 20:57:45,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-10-06 20:57:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 816. [2021-10-06 20:57:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 4.142331288343558) internal successors, (3376), 815 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 3376 transitions. [2021-10-06 20:57:45,567 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 3376 transitions. Word has length 22 [2021-10-06 20:57:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 3376 transitions. [2021-10-06 20:57:45,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 3376 transitions. [2021-10-06 20:57:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:45,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:45,572 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:45,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:45,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:45,786 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash -108694569, now seen corresponding path program 5 times [2021-10-06 20:57:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:45,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923204385] [2021-10-06 20:57:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:57:45,789 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:45,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:45,790 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:45,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-06 20:57:46,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:46,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:46,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:46,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923204385] [2021-10-06 20:57:46,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923204385] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:46,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:46,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:46,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065285350] [2021-10-06 20:57:46,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:46,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:46,414 INFO L87 Difference]: Start difference. First operand 816 states and 3376 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:46,555 INFO L93 Difference]: Finished difference Result 1045 states and 4151 transitions. [2021-10-06 20:57:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:46,562 INFO L225 Difference]: With dead ends: 1045 [2021-10-06 20:57:46,562 INFO L226 Difference]: Without dead ends: 1038 [2021-10-06 20:57:46,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-06 20:57:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 902. [2021-10-06 20:57:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.145394006659267) internal successors, (3735), 901 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3735 transitions. [2021-10-06 20:57:46,592 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3735 transitions. Word has length 22 [2021-10-06 20:57:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:46,592 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 3735 transitions. [2021-10-06 20:57:46,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3735 transitions. [2021-10-06 20:57:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 20:57:46,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:46,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:46,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-10-06 20:57:46,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:46,808 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -27295513, now seen corresponding path program 6 times [2021-10-06 20:57:46,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:46,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092345258] [2021-10-06 20:57:46,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:57:46,810 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:46,811 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:46,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-06 20:57:47,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:57:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:47,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:47,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:47,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092345258] [2021-10-06 20:57:47,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092345258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:47,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:47,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-06 20:57:47,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300241313] [2021-10-06 20:57:47,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 20:57:47,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 20:57:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:47,538 INFO L87 Difference]: Start difference. First operand 902 states and 3735 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:47,701 INFO L93 Difference]: Finished difference Result 1089 states and 4348 transitions. [2021-10-06 20:57:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 20:57:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 20:57:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:47,707 INFO L225 Difference]: With dead ends: 1089 [2021-10-06 20:57:47,708 INFO L226 Difference]: Without dead ends: 1082 [2021-10-06 20:57:47,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-06 20:57:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-10-06 20:57:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 944. [2021-10-06 20:57:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 4.185577942735949) internal successors, (3947), 943 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3947 transitions. [2021-10-06 20:57:47,743 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3947 transitions. Word has length 22 [2021-10-06 20:57:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:47,743 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 3947 transitions. [2021-10-06 20:57:47,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3947 transitions. [2021-10-06 20:57:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:47,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:47,747 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:47,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-06 20:57:47,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:47,962 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash 874705792, now seen corresponding path program 7 times [2021-10-06 20:57:47,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:47,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965412242] [2021-10-06 20:57:47,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:57:47,964 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:47,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:47,965 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:47,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-06 20:57:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:57:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:57:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:48,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:48,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:48,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965412242] [2021-10-06 20:57:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965412242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:48,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-06 20:57:48,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985148158] [2021-10-06 20:57:48,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 20:57:48,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 20:57:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-06 20:57:48,475 INFO L87 Difference]: Start difference. First operand 944 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-10-06 20:57:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:48,870 INFO L93 Difference]: Finished difference Result 1332 states and 5373 transitions. [2021-10-06 20:57:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 20:57:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:57:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:48,878 INFO L225 Difference]: With dead ends: 1332 [2021-10-06 20:57:48,878 INFO L226 Difference]: Without dead ends: 1332 [2021-10-06 20:57:48,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-06 20:57:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-10-06 20:57:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 998. [2021-10-06 20:57:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.163490471414243) internal successors, (4151), 997 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4151 transitions. [2021-10-06 20:57:48,930 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4151 transitions. Word has length 23 [2021-10-06 20:57:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:48,931 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 4151 transitions. [2021-10-06 20:57:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-10-06 20:57:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4151 transitions. [2021-10-06 20:57:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:48,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:48,935 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:48,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:49,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:49,149 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 456948972, now seen corresponding path program 8 times [2021-10-06 20:57:49,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:49,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600189043] [2021-10-06 20:57:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:57:49,151 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:49,152 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:49,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-06 20:57:49,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:57:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:57:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:49,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:57:49,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:49,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600189043] [2021-10-06 20:57:49,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600189043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:49,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:49,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:57:49,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053971581] [2021-10-06 20:57:49,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:57:49,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:57:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:57:49,831 INFO L87 Difference]: Start difference. First operand 998 states and 4151 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:50,294 INFO L93 Difference]: Finished difference Result 1948 states and 7528 transitions. [2021-10-06 20:57:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:57:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:57:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:50,303 INFO L225 Difference]: With dead ends: 1948 [2021-10-06 20:57:50,303 INFO L226 Difference]: Without dead ends: 1948 [2021-10-06 20:57:50,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:57:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-10-06 20:57:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1166. [2021-10-06 20:57:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 4.316738197424892) internal successors, (5029), 1165 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 5029 transitions. [2021-10-06 20:57:50,364 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 5029 transitions. Word has length 23 [2021-10-06 20:57:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:50,365 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 5029 transitions. [2021-10-06 20:57:50,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 5029 transitions. [2021-10-06 20:57:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:50,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:50,370 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:50,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:50,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:50,584 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1033760012, now seen corresponding path program 9 times [2021-10-06 20:57:50,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:50,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304787523] [2021-10-06 20:57:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:57:50,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:50,596 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:50,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-06 20:57:50,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 20:57:50,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:51,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:51,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:51,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304787523] [2021-10-06 20:57:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304787523] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:51,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:57:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73041218] [2021-10-06 20:57:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:57:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:57:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:57:51,522 INFO L87 Difference]: Start difference. First operand 1166 states and 5029 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:53,215 INFO L93 Difference]: Finished difference Result 1884 states and 7535 transitions. [2021-10-06 20:57:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 20:57:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:57:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:53,222 INFO L225 Difference]: With dead ends: 1884 [2021-10-06 20:57:53,223 INFO L226 Difference]: Without dead ends: 1884 [2021-10-06 20:57:53,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1448.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-06 20:57:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-10-06 20:57:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1304. [2021-10-06 20:57:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 4.330775134305449) internal successors, (5643), 1303 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5643 transitions. [2021-10-06 20:57:53,290 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5643 transitions. Word has length 23 [2021-10-06 20:57:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:53,291 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 5643 transitions. [2021-10-06 20:57:53,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5643 transitions. [2021-10-06 20:57:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:53,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:53,296 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:53,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:53,511 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 308655238, now seen corresponding path program 10 times [2021-10-06 20:57:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:53,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846837887] [2021-10-06 20:57:53,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:57:53,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:53,514 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-06 20:57:53,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:57:53,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:54,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:54,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:54,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846837887] [2021-10-06 20:57:54,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846837887] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:54,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:54,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-06 20:57:54,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128461586] [2021-10-06 20:57:54,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:57:54,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:57:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:57:54,187 INFO L87 Difference]: Start difference. First operand 1304 states and 5643 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:56,743 INFO L93 Difference]: Finished difference Result 2132 states and 8551 transitions. [2021-10-06 20:57:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 20:57:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:57:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:56,749 INFO L225 Difference]: With dead ends: 2132 [2021-10-06 20:57:56,749 INFO L226 Difference]: Without dead ends: 2110 [2021-10-06 20:57:56,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=388, Invalid=1418, Unknown=0, NotChecked=0, Total=1806 [2021-10-06 20:57:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-10-06 20:57:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1608. [2021-10-06 20:57:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 4.293092719352831) internal successors, (6899), 1607 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 6899 transitions. [2021-10-06 20:57:56,795 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 6899 transitions. Word has length 23 [2021-10-06 20:57:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:56,796 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 6899 transitions. [2021-10-06 20:57:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 6899 transitions. [2021-10-06 20:57:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:56,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:56,802 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:56,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-06 20:57:57,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:57,015 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1322334116, now seen corresponding path program 11 times [2021-10-06 20:57:57,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:57,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714628461] [2021-10-06 20:57:57,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:57:57,017 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:57,018 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:57,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-06 20:57:57,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 20:57:57,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:57:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:57:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:57:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:57:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:57:57,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:57:57,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714628461] [2021-10-06 20:57:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714628461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:57:57,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:57:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 20:57:57,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788418152] [2021-10-06 20:57:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 20:57:57,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:57:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 20:57:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-06 20:57:57,716 INFO L87 Difference]: Start difference. First operand 1608 states and 6899 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:57:59,324 INFO L93 Difference]: Finished difference Result 3072 states and 12180 transitions. [2021-10-06 20:57:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 20:57:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:57:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:57:59,333 INFO L225 Difference]: With dead ends: 3072 [2021-10-06 20:57:59,333 INFO L226 Difference]: Without dead ends: 3054 [2021-10-06 20:57:59,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=464, Invalid=1176, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 20:57:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-10-06 20:57:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 1722. [2021-10-06 20:57:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 4.323649041255084) internal successors, (7441), 1721 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 7441 transitions. [2021-10-06 20:57:59,395 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 7441 transitions. Word has length 23 [2021-10-06 20:57:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:57:59,396 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 7441 transitions. [2021-10-06 20:57:59,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:57:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 7441 transitions. [2021-10-06 20:57:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:57:59,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:57:59,402 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:57:59,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-06 20:57:59,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:57:59,616 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:57:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:57:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash -524101530, now seen corresponding path program 12 times [2021-10-06 20:57:59,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:57:59,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566895567] [2021-10-06 20:57:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:57:59,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:57:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:57:59,620 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:57:59,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-06 20:58:00,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:58:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:00,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:00,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:00,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566895567] [2021-10-06 20:58:00,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566895567] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:00,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:00,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433901901] [2021-10-06 20:58:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:00,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:00,329 INFO L87 Difference]: Start difference. First operand 1722 states and 7441 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:01,083 INFO L93 Difference]: Finished difference Result 2488 states and 9818 transitions. [2021-10-06 20:58:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:58:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:01,093 INFO L225 Difference]: With dead ends: 2488 [2021-10-06 20:58:01,093 INFO L226 Difference]: Without dead ends: 2462 [2021-10-06 20:58:01,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:58:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-10-06 20:58:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1748. [2021-10-06 20:58:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 4.274756725815684) internal successors, (7468), 1747 states have internal predecessors, (7468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 7468 transitions. [2021-10-06 20:58:01,170 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 7468 transitions. Word has length 23 [2021-10-06 20:58:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 1748 states and 7468 transitions. [2021-10-06 20:58:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 7468 transitions. [2021-10-06 20:58:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:01,177 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:01,177 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:01,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:01,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:01,391 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1940602404, now seen corresponding path program 13 times [2021-10-06 20:58:01,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:01,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286530123] [2021-10-06 20:58:01,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:58:01,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:01,397 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:01,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-06 20:58:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:58:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:01,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:02,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:02,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286530123] [2021-10-06 20:58:02,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286530123] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:02,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:02,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:02,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461612960] [2021-10-06 20:58:02,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:02,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:02,050 INFO L87 Difference]: Start difference. First operand 1748 states and 7468 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:02,760 INFO L93 Difference]: Finished difference Result 2516 states and 9893 transitions. [2021-10-06 20:58:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 20:58:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:02,767 INFO L225 Difference]: With dead ends: 2516 [2021-10-06 20:58:02,767 INFO L226 Difference]: Without dead ends: 2498 [2021-10-06 20:58:02,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:58:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-10-06 20:58:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1858. [2021-10-06 20:58:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 4.26278944534195) internal successors, (7916), 1857 states have internal predecessors, (7916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 7916 transitions. [2021-10-06 20:58:02,819 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 7916 transitions. Word has length 23 [2021-10-06 20:58:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:02,819 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 7916 transitions. [2021-10-06 20:58:02,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 7916 transitions. [2021-10-06 20:58:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:02,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:02,835 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:02,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:03,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:03,037 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1954359972, now seen corresponding path program 14 times [2021-10-06 20:58:03,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:03,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786473793] [2021-10-06 20:58:03,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:58:03,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:03,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:03,040 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-06 20:58:03,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:58:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:03,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:03,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:03,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786473793] [2021-10-06 20:58:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786473793] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 20:58:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412370384] [2021-10-06 20:58:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 20:58:03,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 20:58:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:58:03,986 INFO L87 Difference]: Start difference. First operand 1858 states and 7916 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:05,705 INFO L93 Difference]: Finished difference Result 3356 states and 13050 transitions. [2021-10-06 20:58:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 20:58:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:05,736 INFO L225 Difference]: With dead ends: 3356 [2021-10-06 20:58:05,736 INFO L226 Difference]: Without dead ends: 3338 [2021-10-06 20:58:05,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1314.0ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-10-06 20:58:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-10-06 20:58:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2074. [2021-10-06 20:58:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 4.346357935359382) internal successors, (9010), 2073 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 9010 transitions. [2021-10-06 20:58:05,832 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 9010 transitions. Word has length 23 [2021-10-06 20:58:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:05,832 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 9010 transitions. [2021-10-06 20:58:05,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 9010 transitions. [2021-10-06 20:58:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:05,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:05,840 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:05,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-06 20:58:06,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:06,055 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -945180184, now seen corresponding path program 15 times [2021-10-06 20:58:06,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:06,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752785819] [2021-10-06 20:58:06,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:58:06,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:06,058 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:06,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-06 20:58:06,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 20:58:06,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:06,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:06,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:06,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752785819] [2021-10-06 20:58:06,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752785819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:06,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:06,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:06,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803496067] [2021-10-06 20:58:06,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:06,763 INFO L87 Difference]: Start difference. First operand 2074 states and 9010 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:07,501 INFO L93 Difference]: Finished difference Result 3106 states and 12489 transitions. [2021-10-06 20:58:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:58:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:07,514 INFO L225 Difference]: With dead ends: 3106 [2021-10-06 20:58:07,514 INFO L226 Difference]: Without dead ends: 3082 [2021-10-06 20:58:07,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:58:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-10-06 20:58:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2186. [2021-10-06 20:58:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 4.37116704805492) internal successors, (9551), 2185 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 9551 transitions. [2021-10-06 20:58:07,616 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 9551 transitions. Word has length 23 [2021-10-06 20:58:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:07,617 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 9551 transitions. [2021-10-06 20:58:07,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 9551 transitions. [2021-10-06 20:58:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:07,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:07,625 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:07,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-10-06 20:58:07,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:07,839 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash 311970772, now seen corresponding path program 16 times [2021-10-06 20:58:07,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:07,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354113581] [2021-10-06 20:58:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:58:07,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:07,842 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:07,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-06 20:58:08,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:58:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:08,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:08,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:08,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354113581] [2021-10-06 20:58:08,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354113581] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:08,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:08,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-06 20:58:08,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123500711] [2021-10-06 20:58:08,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:08,548 INFO L87 Difference]: Start difference. First operand 2186 states and 9551 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:12,387 INFO L93 Difference]: Finished difference Result 3284 states and 13510 transitions. [2021-10-06 20:58:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-06 20:58:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:12,400 INFO L225 Difference]: With dead ends: 3284 [2021-10-06 20:58:12,400 INFO L226 Difference]: Without dead ends: 3246 [2021-10-06 20:58:12,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2371.9ms TimeCoverageRelationStatistics Valid=491, Invalid=1861, Unknown=0, NotChecked=0, Total=2352 [2021-10-06 20:58:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-10-06 20:58:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2358. [2021-10-06 20:58:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 4.429783623249894) internal successors, (10441), 2357 states have internal predecessors, (10441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 10441 transitions. [2021-10-06 20:58:12,505 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 10441 transitions. Word has length 23 [2021-10-06 20:58:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:12,506 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 10441 transitions. [2021-10-06 20:58:12,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 10441 transitions. [2021-10-06 20:58:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:12,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:12,515 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:12,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:12,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:12,717 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 403802088, now seen corresponding path program 17 times [2021-10-06 20:58:12,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:12,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389814447] [2021-10-06 20:58:12,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:58:12,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:12,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:12,721 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:12,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-06 20:58:13,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 20:58:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:13,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:13,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389814447] [2021-10-06 20:58:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389814447] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:13,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:58:13,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723843677] [2021-10-06 20:58:13,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:13,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:13,567 INFO L87 Difference]: Start difference. First operand 2358 states and 10441 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-10-06 20:58:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:15,231 INFO L93 Difference]: Finished difference Result 4324 states and 17723 transitions. [2021-10-06 20:58:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 20:58:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:15,245 INFO L225 Difference]: With dead ends: 4324 [2021-10-06 20:58:15,246 INFO L226 Difference]: Without dead ends: 4294 [2021-10-06 20:58:15,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1183.6ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-10-06 20:58:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-10-06 20:58:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 2676. [2021-10-06 20:58:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 4.528971962616822) internal successors, (12115), 2675 states have internal predecessors, (12115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 12115 transitions. [2021-10-06 20:58:15,356 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 12115 transitions. Word has length 23 [2021-10-06 20:58:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:15,356 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 12115 transitions. [2021-10-06 20:58:15,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-10-06 20:58:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 12115 transitions. [2021-10-06 20:58:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:15,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:15,363 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:15,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-10-06 20:58:15,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:15,564 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1982475210, now seen corresponding path program 18 times [2021-10-06 20:58:15,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:15,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674151359] [2021-10-06 20:58:15,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:58:15,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:15,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:15,567 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:15,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-06 20:58:15,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 20:58:15,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:16,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:58:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:16,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:16,366 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:16,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674151359] [2021-10-06 20:58:16,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674151359] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:16,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:16,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:16,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377019996] [2021-10-06 20:58:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:16,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:16,368 INFO L87 Difference]: Start difference. First operand 2676 states and 12115 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:17,025 INFO L93 Difference]: Finished difference Result 3352 states and 14516 transitions. [2021-10-06 20:58:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 20:58:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:17,036 INFO L225 Difference]: With dead ends: 3352 [2021-10-06 20:58:17,037 INFO L226 Difference]: Without dead ends: 3314 [2021-10-06 20:58:17,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-10-06 20:58:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-10-06 20:58:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2694. [2021-10-06 20:58:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 4.50724099517267) internal successors, (12138), 2693 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 12138 transitions. [2021-10-06 20:58:17,113 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 12138 transitions. Word has length 23 [2021-10-06 20:58:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:17,113 INFO L470 AbstractCegarLoop]: Abstraction has 2694 states and 12138 transitions. [2021-10-06 20:58:17,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 12138 transitions. [2021-10-06 20:58:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:17,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:17,137 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:17,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-10-06 20:58:17,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:17,338 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1197769052, now seen corresponding path program 19 times [2021-10-06 20:58:17,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:17,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896079675] [2021-10-06 20:58:17,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:58:17,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:17,342 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:17,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-06 20:58:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:58:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:58:17,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:17,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:18,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:18,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896079675] [2021-10-06 20:58:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896079675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:18,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:18,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-06 20:58:18,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182379450] [2021-10-06 20:58:18,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:18,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:18,037 INFO L87 Difference]: Start difference. First operand 2694 states and 12138 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:20,202 INFO L93 Difference]: Finished difference Result 3292 states and 14310 transitions. [2021-10-06 20:58:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 20:58:20,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:20,212 INFO L225 Difference]: With dead ends: 3292 [2021-10-06 20:58:20,212 INFO L226 Difference]: Without dead ends: 3248 [2021-10-06 20:58:20,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1269.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 20:58:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-10-06 20:58:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2742. [2021-10-06 20:58:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2741 states have (on average 4.4797519153593575) internal successors, (12279), 2741 states have internal predecessors, (12279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 12279 transitions. [2021-10-06 20:58:20,311 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 12279 transitions. Word has length 23 [2021-10-06 20:58:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 12279 transitions. [2021-10-06 20:58:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 12279 transitions. [2021-10-06 20:58:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:20,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:20,321 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:20,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:20,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:20,533 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:20,534 INFO L82 PathProgramCache]: Analyzing trace with hash -987162636, now seen corresponding path program 20 times [2021-10-06 20:58:20,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:20,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995769132] [2021-10-06 20:58:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:58:20,535 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:20,536 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:20,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-06 20:58:20,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:58:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:20,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:21,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:21,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:21,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995769132] [2021-10-06 20:58:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995769132] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:21,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 20:58:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779811471] [2021-10-06 20:58:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 20:58:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 20:58:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-06 20:58:21,563 INFO L87 Difference]: Start difference. First operand 2742 states and 12279 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:23,495 INFO L93 Difference]: Finished difference Result 4556 states and 18561 transitions. [2021-10-06 20:58:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 20:58:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:23,508 INFO L225 Difference]: With dead ends: 4556 [2021-10-06 20:58:23,508 INFO L226 Difference]: Without dead ends: 4538 [2021-10-06 20:58:23,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1498.8ms TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-10-06 20:58:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-10-06 20:58:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2994. [2021-10-06 20:58:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 4.5172068159037755) internal successors, (13520), 2993 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 13520 transitions. [2021-10-06 20:58:23,613 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 13520 transitions. Word has length 23 [2021-10-06 20:58:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:23,613 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 13520 transitions. [2021-10-06 20:58:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 13520 transitions. [2021-10-06 20:58:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:23,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:23,621 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:23,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-10-06 20:58:23,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:23,822 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -898582808, now seen corresponding path program 21 times [2021-10-06 20:58:23,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:23,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130738959] [2021-10-06 20:58:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:58:23,825 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:23,826 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:23,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-06 20:58:24,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 20:58:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:24,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:24,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:24,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130738959] [2021-10-06 20:58:24,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130738959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:24,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:24,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:24,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841618460] [2021-10-06 20:58:24,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:24,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:24,669 INFO L87 Difference]: Start difference. First operand 2994 states and 13520 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:25,236 INFO L93 Difference]: Finished difference Result 4430 states and 18136 transitions. [2021-10-06 20:58:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:58:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:25,249 INFO L225 Difference]: With dead ends: 4430 [2021-10-06 20:58:25,249 INFO L226 Difference]: Without dead ends: 4414 [2021-10-06 20:58:25,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:58:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2021-10-06 20:58:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 3012. [2021-10-06 20:58:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 4.498837595483228) internal successors, (13546), 3011 states have internal predecessors, (13546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 13546 transitions. [2021-10-06 20:58:25,334 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 13546 transitions. Word has length 23 [2021-10-06 20:58:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:25,334 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 13546 transitions. [2021-10-06 20:58:25,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 13546 transitions. [2021-10-06 20:58:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:25,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:25,361 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:25,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-10-06 20:58:25,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:25,562 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash 620723672, now seen corresponding path program 22 times [2021-10-06 20:58:25,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:25,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020646685] [2021-10-06 20:58:25,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:58:25,564 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:25,565 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:25,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-06 20:58:25,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:58:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:26,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:26,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:26,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020646685] [2021-10-06 20:58:26,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020646685] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:26,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:26,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:26,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047098489] [2021-10-06 20:58:26,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:26,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:26,216 INFO L87 Difference]: Start difference. First operand 3012 states and 13546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:26,658 INFO L93 Difference]: Finished difference Result 3442 states and 14985 transitions. [2021-10-06 20:58:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 20:58:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:26,668 INFO L225 Difference]: With dead ends: 3442 [2021-10-06 20:58:26,668 INFO L226 Difference]: Without dead ends: 3378 [2021-10-06 20:58:26,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-06 20:58:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2021-10-06 20:58:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 2980. [2021-10-06 20:58:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 4.517623363544813) internal successors, (13458), 2979 states have internal predecessors, (13458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 13458 transitions. [2021-10-06 20:58:26,736 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 13458 transitions. Word has length 23 [2021-10-06 20:58:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 13458 transitions. [2021-10-06 20:58:26,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 13458 transitions. [2021-10-06 20:58:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:26,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:26,744 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:26,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-10-06 20:58:26,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:26,945 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash 954790580, now seen corresponding path program 23 times [2021-10-06 20:58:26,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:26,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387130787] [2021-10-06 20:58:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:58:26,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:26,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:26,949 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-06 20:58:27,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 20:58:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:58:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:27,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:27,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:27,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387130787] [2021-10-06 20:58:27,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387130787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:27,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:27,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:27,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493576281] [2021-10-06 20:58:27,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:27,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:27,784 INFO L87 Difference]: Start difference. First operand 2980 states and 13458 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:28,210 INFO L93 Difference]: Finished difference Result 3414 states and 14935 transitions. [2021-10-06 20:58:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 20:58:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:28,220 INFO L225 Difference]: With dead ends: 3414 [2021-10-06 20:58:28,220 INFO L226 Difference]: Without dead ends: 3394 [2021-10-06 20:58:28,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-10-06 20:58:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-10-06 20:58:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 2994. [2021-10-06 20:58:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 4.510190444370197) internal successors, (13499), 2993 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 13499 transitions. [2021-10-06 20:58:28,330 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 13499 transitions. Word has length 23 [2021-10-06 20:58:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:28,330 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 13499 transitions. [2021-10-06 20:58:28,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 13499 transitions. [2021-10-06 20:58:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:28,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:28,338 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:28,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:28,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:28,539 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash 972742510, now seen corresponding path program 24 times [2021-10-06 20:58:28,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:28,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961046399] [2021-10-06 20:58:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:58:28,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:28,543 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-06 20:58:28,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:58:28,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:29,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:29,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:29,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961046399] [2021-10-06 20:58:29,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961046399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:29,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:29,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:29,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466071200] [2021-10-06 20:58:29,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:29,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:29,287 INFO L87 Difference]: Start difference. First operand 2994 states and 13499 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:29,788 INFO L93 Difference]: Finished difference Result 3372 states and 14800 transitions. [2021-10-06 20:58:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 20:58:29,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:29,799 INFO L225 Difference]: With dead ends: 3372 [2021-10-06 20:58:29,799 INFO L226 Difference]: Without dead ends: 3330 [2021-10-06 20:58:29,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-06 20:58:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-10-06 20:58:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2982. [2021-10-06 20:58:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.516605166051661) internal successors, (13464), 2981 states have internal predecessors, (13464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13464 transitions. [2021-10-06 20:58:29,872 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13464 transitions. Word has length 23 [2021-10-06 20:58:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:29,872 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 13464 transitions. [2021-10-06 20:58:29,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13464 transitions. [2021-10-06 20:58:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:29,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:29,882 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:29,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-10-06 20:58:30,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:30,083 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1176518982, now seen corresponding path program 25 times [2021-10-06 20:58:30,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:30,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063923436] [2021-10-06 20:58:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:58:30,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:30,086 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:30,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-06 20:58:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:58:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:30,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:30,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:30,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063923436] [2021-10-06 20:58:30,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063923436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:30,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:30,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:30,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431672736] [2021-10-06 20:58:30,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:30,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:30,849 INFO L87 Difference]: Start difference. First operand 2982 states and 13464 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:31,915 INFO L93 Difference]: Finished difference Result 3702 states and 15776 transitions. [2021-10-06 20:58:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 20:58:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:31,926 INFO L225 Difference]: With dead ends: 3702 [2021-10-06 20:58:31,926 INFO L226 Difference]: Without dead ends: 3668 [2021-10-06 20:58:31,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-06 20:58:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2021-10-06 20:58:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3108. [2021-10-06 20:58:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 4.493401995494046) internal successors, (13961), 3107 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 13961 transitions. [2021-10-06 20:58:32,030 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 13961 transitions. Word has length 23 [2021-10-06 20:58:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:32,030 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 13961 transitions. [2021-10-06 20:58:32,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 13961 transitions. [2021-10-06 20:58:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:32,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:32,060 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:32,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-10-06 20:58:32,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:32,273 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2041903848, now seen corresponding path program 26 times [2021-10-06 20:58:32,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:32,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107581716] [2021-10-06 20:58:32,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:58:32,276 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:32,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:32,277 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:32,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-06 20:58:32,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:58:32,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:32,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:33,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:33,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107581716] [2021-10-06 20:58:33,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107581716] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:33,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:33,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:33,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416250782] [2021-10-06 20:58:33,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:33,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:33,160 INFO L87 Difference]: Start difference. First operand 3108 states and 13961 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:34,164 INFO L93 Difference]: Finished difference Result 4376 states and 18606 transitions. [2021-10-06 20:58:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:58:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:34,183 INFO L225 Difference]: With dead ends: 4376 [2021-10-06 20:58:34,183 INFO L226 Difference]: Without dead ends: 4328 [2021-10-06 20:58:34,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:58:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-10-06 20:58:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 3318. [2021-10-06 20:58:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3317 states have (on average 4.558938800120591) internal successors, (15122), 3317 states have internal predecessors, (15122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 15122 transitions. [2021-10-06 20:58:34,356 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 15122 transitions. Word has length 23 [2021-10-06 20:58:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:34,356 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 15122 transitions. [2021-10-06 20:58:34,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 15122 transitions. [2021-10-06 20:58:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:34,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:34,378 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:34,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:34,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:34,592 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -878680600, now seen corresponding path program 27 times [2021-10-06 20:58:34,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:34,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828731850] [2021-10-06 20:58:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:58:34,594 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:34,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:34,595 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:34,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-06 20:58:35,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 20:58:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:35,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:35,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:35,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828731850] [2021-10-06 20:58:35,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828731850] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:35,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:35,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:35,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217618610] [2021-10-06 20:58:35,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:35,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:35,508 INFO L87 Difference]: Start difference. First operand 3318 states and 15122 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:36,070 INFO L93 Difference]: Finished difference Result 4616 states and 19275 transitions. [2021-10-06 20:58:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:58:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:36,087 INFO L225 Difference]: With dead ends: 4616 [2021-10-06 20:58:36,087 INFO L226 Difference]: Without dead ends: 4590 [2021-10-06 20:58:36,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:58:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-10-06 20:58:36,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 3218. [2021-10-06 20:58:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 4.5247124650295305) internal successors, (14556), 3217 states have internal predecessors, (14556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 14556 transitions. [2021-10-06 20:58:36,219 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 14556 transitions. Word has length 23 [2021-10-06 20:58:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:36,220 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 14556 transitions. [2021-10-06 20:58:36,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 14556 transitions. [2021-10-06 20:58:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:36,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:36,232 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:36,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-10-06 20:58:36,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:36,446 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1099319544, now seen corresponding path program 28 times [2021-10-06 20:58:36,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:36,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300976136] [2021-10-06 20:58:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:58:36,448 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:36,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:36,450 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:36,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-06 20:58:36,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:58:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:37,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:37,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:37,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300976136] [2021-10-06 20:58:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300976136] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:37,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:37,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:58:37,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361690553] [2021-10-06 20:58:37,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:37,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:37,306 INFO L87 Difference]: Start difference. First operand 3218 states and 14556 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:39,362 INFO L93 Difference]: Finished difference Result 4968 states and 20946 transitions. [2021-10-06 20:58:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 20:58:39,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:39,378 INFO L225 Difference]: With dead ends: 4968 [2021-10-06 20:58:39,379 INFO L226 Difference]: Without dead ends: 4932 [2021-10-06 20:58:39,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1537.0ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-10-06 20:58:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-10-06 20:58:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 3688. [2021-10-06 20:58:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 4.555193924599946) internal successors, (16795), 3687 states have internal predecessors, (16795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 16795 transitions. [2021-10-06 20:58:39,575 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 16795 transitions. Word has length 23 [2021-10-06 20:58:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 3688 states and 16795 transitions. [2021-10-06 20:58:39,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 16795 transitions. [2021-10-06 20:58:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:39,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:39,590 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:39,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:39,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:39,805 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2121650604, now seen corresponding path program 29 times [2021-10-06 20:58:39,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:39,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258572094] [2021-10-06 20:58:39,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:58:39,807 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:39,808 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:39,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-06 20:58:40,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 20:58:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:58:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:40,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:40,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:40,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258572094] [2021-10-06 20:58:40,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258572094] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:40,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:40,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:40,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415186736] [2021-10-06 20:58:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:40,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:40,598 INFO L87 Difference]: Start difference. First operand 3688 states and 16795 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:41,513 INFO L93 Difference]: Finished difference Result 4550 states and 19621 transitions. [2021-10-06 20:58:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 20:58:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:41,526 INFO L225 Difference]: With dead ends: 4550 [2021-10-06 20:58:41,526 INFO L226 Difference]: Without dead ends: 4456 [2021-10-06 20:58:41,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 20:58:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2021-10-06 20:58:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3788. [2021-10-06 20:58:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.545550567731714) internal successors, (17214), 3787 states have internal predecessors, (17214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 17214 transitions. [2021-10-06 20:58:41,655 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 17214 transitions. Word has length 23 [2021-10-06 20:58:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 17214 transitions. [2021-10-06 20:58:41,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 17214 transitions. [2021-10-06 20:58:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:41,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:41,667 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:41,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-10-06 20:58:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:41,881 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1029643906, now seen corresponding path program 30 times [2021-10-06 20:58:41,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:41,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004657384] [2021-10-06 20:58:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:58:41,884 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:41,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:41,885 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:41,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-06 20:58:42,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 20:58:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:42,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 20:58:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:42,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:42,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:42,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004657384] [2021-10-06 20:58:42,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004657384] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:42,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:42,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 20:58:42,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967261209] [2021-10-06 20:58:42,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 20:58:42,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 20:58:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-06 20:58:42,872 INFO L87 Difference]: Start difference. First operand 3788 states and 17214 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:45,015 INFO L93 Difference]: Finished difference Result 5954 states and 24515 transitions. [2021-10-06 20:58:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 20:58:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:45,071 INFO L225 Difference]: With dead ends: 5954 [2021-10-06 20:58:45,072 INFO L226 Difference]: Without dead ends: 5914 [2021-10-06 20:58:45,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1379.7ms TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2021-10-06 20:58:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5914 states. [2021-10-06 20:58:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5914 to 3982. [2021-10-06 20:58:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3982 states, 3981 states have (on average 4.572469228836976) internal successors, (18203), 3981 states have internal predecessors, (18203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 18203 transitions. [2021-10-06 20:58:45,250 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 18203 transitions. Word has length 23 [2021-10-06 20:58:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:45,250 INFO L470 AbstractCegarLoop]: Abstraction has 3982 states and 18203 transitions. [2021-10-06 20:58:45,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 18203 transitions. [2021-10-06 20:58:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:45,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:45,263 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:45,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:45,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:45,477 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1955834616, now seen corresponding path program 31 times [2021-10-06 20:58:45,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:45,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731909429] [2021-10-06 20:58:45,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:58:45,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:45,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:45,480 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:45,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-06 20:58:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:58:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:46,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:46,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:46,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731909429] [2021-10-06 20:58:46,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731909429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:46,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:46,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:58:46,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422421960] [2021-10-06 20:58:46,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:46,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:46,434 INFO L87 Difference]: Start difference. First operand 3982 states and 18203 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:47,925 INFO L93 Difference]: Finished difference Result 6820 states and 28881 transitions. [2021-10-06 20:58:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 20:58:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:47,945 INFO L225 Difference]: With dead ends: 6820 [2021-10-06 20:58:47,945 INFO L226 Difference]: Without dead ends: 6792 [2021-10-06 20:58:47,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-10-06 20:58:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2021-10-06 20:58:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 4584. [2021-10-06 20:58:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4584 states, 4583 states have (on average 4.665939341042985) internal successors, (21384), 4583 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4584 states to 4584 states and 21384 transitions. [2021-10-06 20:58:48,097 INFO L78 Accepts]: Start accepts. Automaton has 4584 states and 21384 transitions. Word has length 23 [2021-10-06 20:58:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 4584 states and 21384 transitions. [2021-10-06 20:58:48,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4584 states and 21384 transitions. [2021-10-06 20:58:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:48,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:48,111 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:48,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-10-06 20:58:48,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:48,325 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1258235204, now seen corresponding path program 32 times [2021-10-06 20:58:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:48,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802147674] [2021-10-06 20:58:48,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:58:48,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:48,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:48,328 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:48,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-06 20:58:48,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:58:48,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:48,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:49,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:49,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802147674] [2021-10-06 20:58:49,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802147674] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:49,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789740461] [2021-10-06 20:58:49,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:49,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:49,193 INFO L87 Difference]: Start difference. First operand 4584 states and 21384 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:50,236 INFO L93 Difference]: Finished difference Result 5614 states and 24751 transitions. [2021-10-06 20:58:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:58:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:50,256 INFO L225 Difference]: With dead ends: 5614 [2021-10-06 20:58:50,256 INFO L226 Difference]: Without dead ends: 5530 [2021-10-06 20:58:50,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:58:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2021-10-06 20:58:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 4630. [2021-10-06 20:58:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 4629 states have (on average 4.6504644631669905) internal successors, (21527), 4629 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 21527 transitions. [2021-10-06 20:58:50,394 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 21527 transitions. Word has length 23 [2021-10-06 20:58:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 4630 states and 21527 transitions. [2021-10-06 20:58:50,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 21527 transitions. [2021-10-06 20:58:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:50,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:50,405 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:50,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-10-06 20:58:50,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:50,606 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 492947942, now seen corresponding path program 33 times [2021-10-06 20:58:50,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:50,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550944644] [2021-10-06 20:58:50,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:58:50,608 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:50,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:50,609 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:50,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-06 20:58:51,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:58:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:51,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:51,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:58:51,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:51,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550944644] [2021-10-06 20:58:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550944644] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:51,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:51,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:51,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432512394] [2021-10-06 20:58:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:51,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:51,460 INFO L87 Difference]: Start difference. First operand 4630 states and 21527 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:52,381 INFO L93 Difference]: Finished difference Result 5086 states and 22787 transitions. [2021-10-06 20:58:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 20:58:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:52,397 INFO L225 Difference]: With dead ends: 5086 [2021-10-06 20:58:52,397 INFO L226 Difference]: Without dead ends: 5018 [2021-10-06 20:58:52,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-06 20:58:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-10-06 20:58:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 4678. [2021-10-06 20:58:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.633953388924525) internal successors, (21673), 4677 states have internal predecessors, (21673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 21673 transitions. [2021-10-06 20:58:52,548 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 21673 transitions. Word has length 23 [2021-10-06 20:58:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:52,548 INFO L470 AbstractCegarLoop]: Abstraction has 4678 states and 21673 transitions. [2021-10-06 20:58:52,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 21673 transitions. [2021-10-06 20:58:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:52,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:52,558 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:52,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-10-06 20:58:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:52,759 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash 660298998, now seen corresponding path program 34 times [2021-10-06 20:58:52,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:52,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551852271] [2021-10-06 20:58:52,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:58:52,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:52,763 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:52,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-06 20:58:53,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:58:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:58:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:53,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:53,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551852271] [2021-10-06 20:58:53,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551852271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:53,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:53,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:58:53,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285041103] [2021-10-06 20:58:53,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:58:53,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:58:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:58:53,581 INFO L87 Difference]: Start difference. First operand 4678 states and 21673 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:54,466 INFO L93 Difference]: Finished difference Result 7358 states and 32381 transitions. [2021-10-06 20:58:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 20:58:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:54,488 INFO L225 Difference]: With dead ends: 7358 [2021-10-06 20:58:54,488 INFO L226 Difference]: Without dead ends: 7236 [2021-10-06 20:58:54,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-10-06 20:58:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-10-06 20:58:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 5174. [2021-10-06 20:58:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5174 states, 5173 states have (on average 4.687608737676396) internal successors, (24249), 5173 states have internal predecessors, (24249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 24249 transitions. [2021-10-06 20:58:54,701 INFO L78 Accepts]: Start accepts. Automaton has 5174 states and 24249 transitions. Word has length 23 [2021-10-06 20:58:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 5174 states and 24249 transitions. [2021-10-06 20:58:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5174 states and 24249 transitions. [2021-10-06 20:58:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:54,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:54,712 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:54,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:54,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:54,917 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1428533192, now seen corresponding path program 35 times [2021-10-06 20:58:54,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:54,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178802176] [2021-10-06 20:58:54,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:58:54,920 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:54,921 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:54,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-06 20:58:55,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:58:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:55,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:55,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178802176] [2021-10-06 20:58:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178802176] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:55,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 20:58:55,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041689841] [2021-10-06 20:58:55,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 20:58:55,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 20:58:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-06 20:58:55,997 INFO L87 Difference]: Start difference. First operand 5174 states and 24249 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:58:58,018 INFO L93 Difference]: Finished difference Result 7064 states and 31256 transitions. [2021-10-06 20:58:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 20:58:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:58:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:58:58,042 INFO L225 Difference]: With dead ends: 7064 [2021-10-06 20:58:58,042 INFO L226 Difference]: Without dead ends: 7050 [2021-10-06 20:58:58,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1386.3ms TimeCoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 20:58:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2021-10-06 20:58:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 5350. [2021-10-06 20:58:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 5349 states have (on average 4.716208637128435) internal successors, (25227), 5349 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 25227 transitions. [2021-10-06 20:58:58,301 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 25227 transitions. Word has length 23 [2021-10-06 20:58:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:58:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 5350 states and 25227 transitions. [2021-10-06 20:58:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:58:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 25227 transitions. [2021-10-06 20:58:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:58:58,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:58:58,316 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:58:58,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-06 20:58:58,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:58:58,531 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:58:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:58:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1758462316, now seen corresponding path program 36 times [2021-10-06 20:58:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:58:58,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53502495] [2021-10-06 20:58:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:58:58,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:58:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:58:58,534 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:58:58,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-06 20:58:59,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:58:59,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:58:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:58:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:58:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:59,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:58:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:58:59,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:58:59,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53502495] [2021-10-06 20:58:59,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53502495] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:58:59,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:58:59,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:58:59,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552987970] [2021-10-06 20:58:59,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:58:59,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:58:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:58:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:58:59,635 INFO L87 Difference]: Start difference. First operand 5350 states and 25227 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:01,543 INFO L93 Difference]: Finished difference Result 9224 states and 39652 transitions. [2021-10-06 20:59:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 20:59:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:01,571 INFO L225 Difference]: With dead ends: 9224 [2021-10-06 20:59:01,572 INFO L226 Difference]: Without dead ends: 9132 [2021-10-06 20:59:01,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1393.5ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-06 20:59:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2021-10-06 20:59:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 5896. [2021-10-06 20:59:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 4.728922815945717) internal successors, (27877), 5895 states have internal predecessors, (27877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 27877 transitions. [2021-10-06 20:59:01,854 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 27877 transitions. Word has length 23 [2021-10-06 20:59:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:01,854 INFO L470 AbstractCegarLoop]: Abstraction has 5896 states and 27877 transitions. [2021-10-06 20:59:01,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 27877 transitions. [2021-10-06 20:59:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:01,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:01,867 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:01,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-10-06 20:59:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:02,068 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 874653780, now seen corresponding path program 37 times [2021-10-06 20:59:02,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:02,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848863718] [2021-10-06 20:59:02,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:59:02,071 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:02,071 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:02,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-06 20:59:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:59:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:59:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:02,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:02,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848863718] [2021-10-06 20:59:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848863718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:02,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:02,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:59:02,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83877911] [2021-10-06 20:59:02,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:59:02,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:59:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:59:02,849 INFO L87 Difference]: Start difference. First operand 5896 states and 27877 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:03,522 INFO L93 Difference]: Finished difference Result 7020 states and 31628 transitions. [2021-10-06 20:59:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:59:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:03,545 INFO L225 Difference]: With dead ends: 7020 [2021-10-06 20:59:03,545 INFO L226 Difference]: Without dead ends: 6890 [2021-10-06 20:59:03,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-10-06 20:59:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6890 states. [2021-10-06 20:59:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6890 to 5992. [2021-10-06 20:59:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 4.70589217159072) internal successors, (28193), 5991 states have internal predecessors, (28193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 28193 transitions. [2021-10-06 20:59:03,826 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 28193 transitions. Word has length 23 [2021-10-06 20:59:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:03,826 INFO L470 AbstractCegarLoop]: Abstraction has 5992 states and 28193 transitions. [2021-10-06 20:59:03,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 28193 transitions. [2021-10-06 20:59:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:03,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:03,845 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-06 20:59:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:04,060 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:04,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1014643192, now seen corresponding path program 38 times [2021-10-06 20:59:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:04,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241182971] [2021-10-06 20:59:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:59:04,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:04,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:04,063 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:04,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-06 20:59:04,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:59:04,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:04,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:05,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:05,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241182971] [2021-10-06 20:59:05,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241182971] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:05,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:05,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:05,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667780708] [2021-10-06 20:59:05,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:05,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:05,210 INFO L87 Difference]: Start difference. First operand 5992 states and 28193 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:08,339 INFO L93 Difference]: Finished difference Result 9550 states and 42386 transitions. [2021-10-06 20:59:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-06 20:59:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:08,370 INFO L225 Difference]: With dead ends: 9550 [2021-10-06 20:59:08,370 INFO L226 Difference]: Without dead ends: 9538 [2021-10-06 20:59:08,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2310.8ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-10-06 20:59:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2021-10-06 20:59:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 6848. [2021-10-06 20:59:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 4.824156564918942) internal successors, (33031), 6847 states have internal predecessors, (33031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 33031 transitions. [2021-10-06 20:59:08,591 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 33031 transitions. Word has length 23 [2021-10-06 20:59:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:08,592 INFO L470 AbstractCegarLoop]: Abstraction has 6848 states and 33031 transitions. [2021-10-06 20:59:08,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 33031 transitions. [2021-10-06 20:59:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:08,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:08,608 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:08,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-06 20:59:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:08,809 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:08,810 INFO L82 PathProgramCache]: Analyzing trace with hash 469304296, now seen corresponding path program 39 times [2021-10-06 20:59:08,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:08,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976652844] [2021-10-06 20:59:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:59:08,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:08,812 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:08,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-06 20:59:09,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 20:59:09,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:09,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:10,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:10,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976652844] [2021-10-06 20:59:10,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976652844] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:10,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:10,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:10,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685014733] [2021-10-06 20:59:10,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:10,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:10,103 INFO L87 Difference]: Start difference. First operand 6848 states and 33031 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:12,231 INFO L93 Difference]: Finished difference Result 11034 states and 48682 transitions. [2021-10-06 20:59:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 20:59:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:12,268 INFO L225 Difference]: With dead ends: 11034 [2021-10-06 20:59:12,268 INFO L226 Difference]: Without dead ends: 10954 [2021-10-06 20:59:12,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1489.8ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-10-06 20:59:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10954 states. [2021-10-06 20:59:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10954 to 7214. [2021-10-06 20:59:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7214 states, 7213 states have (on average 4.810203798696797) internal successors, (34696), 7213 states have internal predecessors, (34696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 34696 transitions. [2021-10-06 20:59:12,600 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 34696 transitions. Word has length 23 [2021-10-06 20:59:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:12,600 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 34696 transitions. [2021-10-06 20:59:12,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 34696 transitions. [2021-10-06 20:59:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:12,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:12,622 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:12,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-06 20:59:12,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:12,830 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1215078018, now seen corresponding path program 40 times [2021-10-06 20:59:12,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:12,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053735813] [2021-10-06 20:59:12,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:59:12,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:12,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:12,834 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:12,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-06 20:59:13,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:59:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:13,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:13,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:13,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053735813] [2021-10-06 20:59:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053735813] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:13,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:13,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:13,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333314976] [2021-10-06 20:59:13,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:13,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:13,996 INFO L87 Difference]: Start difference. First operand 7214 states and 34696 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:16,251 INFO L93 Difference]: Finished difference Result 9552 states and 43323 transitions. [2021-10-06 20:59:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:59:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:16,283 INFO L225 Difference]: With dead ends: 9552 [2021-10-06 20:59:16,283 INFO L226 Difference]: Without dead ends: 9536 [2021-10-06 20:59:16,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1636.0ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-06 20:59:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-10-06 20:59:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 7560. [2021-10-06 20:59:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7560 states, 7559 states have (on average 4.838867575076068) internal successors, (36577), 7559 states have internal predecessors, (36577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7560 states to 7560 states and 36577 transitions. [2021-10-06 20:59:16,577 INFO L78 Accepts]: Start accepts. Automaton has 7560 states and 36577 transitions. Word has length 23 [2021-10-06 20:59:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:16,578 INFO L470 AbstractCegarLoop]: Abstraction has 7560 states and 36577 transitions. [2021-10-06 20:59:16,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7560 states and 36577 transitions. [2021-10-06 20:59:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:16,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:16,595 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:16,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-10-06 20:59:16,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:16,797 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2130159506, now seen corresponding path program 41 times [2021-10-06 20:59:16,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:16,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760638887] [2021-10-06 20:59:16,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:59:16,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:16,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:16,800 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:16,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-06 20:59:17,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:59:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 20:59:17,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:17,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:17,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:17,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760638887] [2021-10-06 20:59:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760638887] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:17,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:17,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-06 20:59:17,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340189437] [2021-10-06 20:59:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 20:59:17,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 20:59:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:59:17,956 INFO L87 Difference]: Start difference. First operand 7560 states and 36577 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:25,401 INFO L93 Difference]: Finished difference Result 12010 states and 53594 transitions. [2021-10-06 20:59:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-06 20:59:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:25,457 INFO L225 Difference]: With dead ends: 12010 [2021-10-06 20:59:25,458 INFO L226 Difference]: Without dead ends: 11962 [2021-10-06 20:59:25,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 5502.9ms TimeCoverageRelationStatistics Valid=1165, Invalid=4535, Unknown=0, NotChecked=0, Total=5700 [2021-10-06 20:59:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11962 states. [2021-10-06 20:59:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11962 to 7648. [2021-10-06 20:59:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7647 states have (on average 4.836144893422257) internal successors, (36982), 7647 states have internal predecessors, (36982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 36982 transitions. [2021-10-06 20:59:25,810 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 36982 transitions. Word has length 23 [2021-10-06 20:59:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:25,810 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 36982 transitions. [2021-10-06 20:59:25,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 36982 transitions. [2021-10-06 20:59:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:25,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:25,829 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:25,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-10-06 20:59:26,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:26,030 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1416497114, now seen corresponding path program 42 times [2021-10-06 20:59:26,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:26,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779075293] [2021-10-06 20:59:26,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:59:26,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:26,034 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:26,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-06 20:59:26,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 20:59:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 20:59:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:26,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:27,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:27,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779075293] [2021-10-06 20:59:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779075293] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:27,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-06 20:59:27,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825144588] [2021-10-06 20:59:27,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 20:59:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 20:59:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:59:27,145 INFO L87 Difference]: Start difference. First operand 7648 states and 36982 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-06 20:59:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:29,337 INFO L93 Difference]: Finished difference Result 9352 states and 43850 transitions. [2021-10-06 20:59:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 20:59:29,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:29,375 INFO L225 Difference]: With dead ends: 9352 [2021-10-06 20:59:29,375 INFO L226 Difference]: Without dead ends: 9314 [2021-10-06 20:59:29,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1458.8ms TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 20:59:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-10-06 20:59:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 7562. [2021-10-06 20:59:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7562 states, 7561 states have (on average 4.83057796587753) internal successors, (36524), 7561 states have internal predecessors, (36524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7562 states to 7562 states and 36524 transitions. [2021-10-06 20:59:29,635 INFO L78 Accepts]: Start accepts. Automaton has 7562 states and 36524 transitions. Word has length 23 [2021-10-06 20:59:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:29,635 INFO L470 AbstractCegarLoop]: Abstraction has 7562 states and 36524 transitions. [2021-10-06 20:59:29,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-06 20:59:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7562 states and 36524 transitions. [2021-10-06 20:59:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:29,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:29,653 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:29,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2021-10-06 20:59:29,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:29,854 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash 83321076, now seen corresponding path program 43 times [2021-10-06 20:59:29,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:29,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687713390] [2021-10-06 20:59:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:59:29,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:29,858 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:29,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-06 20:59:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:59:30,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:59:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:30,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:30,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:30,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687713390] [2021-10-06 20:59:30,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687713390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:30,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:30,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:59:30,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367136242] [2021-10-06 20:59:30,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:59:30,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:59:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:59:30,698 INFO L87 Difference]: Start difference. First operand 7562 states and 36524 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:31,776 INFO L93 Difference]: Finished difference Result 10806 states and 49836 transitions. [2021-10-06 20:59:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 20:59:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:31,815 INFO L225 Difference]: With dead ends: 10806 [2021-10-06 20:59:31,815 INFO L226 Difference]: Without dead ends: 10714 [2021-10-06 20:59:31,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-10-06 20:59:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10714 states. [2021-10-06 20:59:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10714 to 8096. [2021-10-06 20:59:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8096 states, 8095 states have (on average 4.871896232242125) internal successors, (39438), 8095 states have internal predecessors, (39438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 39438 transitions. [2021-10-06 20:59:32,086 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 39438 transitions. Word has length 23 [2021-10-06 20:59:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:32,086 INFO L470 AbstractCegarLoop]: Abstraction has 8096 states and 39438 transitions. [2021-10-06 20:59:32,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 39438 transitions. [2021-10-06 20:59:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:32,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:32,108 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:32,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2021-10-06 20:59:32,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:32,309 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 372589418, now seen corresponding path program 44 times [2021-10-06 20:59:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:32,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985663356] [2021-10-06 20:59:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:59:32,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:32,312 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:32,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-06 20:59:32,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:59:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:32,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:59:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:33,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:33,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:33,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985663356] [2021-10-06 20:59:33,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985663356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:33,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:33,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:59:33,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576430561] [2021-10-06 20:59:33,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:59:33,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:59:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:59:33,325 INFO L87 Difference]: Start difference. First operand 8096 states and 39438 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:34,048 INFO L93 Difference]: Finished difference Result 11886 states and 53388 transitions. [2021-10-06 20:59:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:59:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:34,088 INFO L225 Difference]: With dead ends: 11886 [2021-10-06 20:59:34,088 INFO L226 Difference]: Without dead ends: 11868 [2021-10-06 20:59:34,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-06 20:59:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2021-10-06 20:59:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 7690. [2021-10-06 20:59:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 4.829756795422031) internal successors, (37136), 7689 states have internal predecessors, (37136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 37136 transitions. [2021-10-06 20:59:34,361 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 37136 transitions. Word has length 23 [2021-10-06 20:59:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:34,362 INFO L470 AbstractCegarLoop]: Abstraction has 7690 states and 37136 transitions. [2021-10-06 20:59:34,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 37136 transitions. [2021-10-06 20:59:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:34,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:34,380 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:34,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-10-06 20:59:34,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:34,581 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1665778804, now seen corresponding path program 45 times [2021-10-06 20:59:34,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:34,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632399825] [2021-10-06 20:59:34,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:59:34,583 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:34,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:34,584 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-10-06 20:59:35,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 20:59:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 20:59:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:35,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:36,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:36,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632399825] [2021-10-06 20:59:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632399825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:36,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:36,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-10-06 20:59:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536274922] [2021-10-06 20:59:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 20:59:36,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 20:59:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-06 20:59:36,053 INFO L87 Difference]: Start difference. First operand 7690 states and 37136 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:42,756 INFO L93 Difference]: Finished difference Result 13908 states and 61824 transitions. [2021-10-06 20:59:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-06 20:59:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:42,799 INFO L225 Difference]: With dead ends: 13908 [2021-10-06 20:59:42,799 INFO L226 Difference]: Without dead ends: 13892 [2021-10-06 20:59:42,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 5535.2ms TimeCoverageRelationStatistics Valid=735, Invalid=2127, Unknown=0, NotChecked=0, Total=2862 [2021-10-06 20:59:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2021-10-06 20:59:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 7762. [2021-10-06 20:59:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7762 states, 7761 states have (on average 4.827857234892411) internal successors, (37469), 7761 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7762 states to 7762 states and 37469 transitions. [2021-10-06 20:59:43,191 INFO L78 Accepts]: Start accepts. Automaton has 7762 states and 37469 transitions. Word has length 23 [2021-10-06 20:59:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:43,191 INFO L470 AbstractCegarLoop]: Abstraction has 7762 states and 37469 transitions. [2021-10-06 20:59:43,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7762 states and 37469 transitions. [2021-10-06 20:59:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:43,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:43,208 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:43,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-10-06 20:59:43,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:43,417 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash -432949590, now seen corresponding path program 46 times [2021-10-06 20:59:43,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:43,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628578788] [2021-10-06 20:59:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 20:59:43,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:43,420 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:43,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-10-06 20:59:43,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 20:59:43,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 20:59:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:44,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:44,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:44,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628578788] [2021-10-06 20:59:44,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628578788] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:44,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:44,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 20:59:44,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739106109] [2021-10-06 20:59:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 20:59:44,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 20:59:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 20:59:44,354 INFO L87 Difference]: Start difference. First operand 7762 states and 37469 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:45,293 INFO L93 Difference]: Finished difference Result 9618 states and 44837 transitions. [2021-10-06 20:59:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 20:59:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:45,326 INFO L225 Difference]: With dead ends: 9618 [2021-10-06 20:59:45,327 INFO L226 Difference]: Without dead ends: 9490 [2021-10-06 20:59:45,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-10-06 20:59:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2021-10-06 20:59:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 8192. [2021-10-06 20:59:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 4.857038212672445) internal successors, (39784), 8191 states have internal predecessors, (39784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 39784 transitions. [2021-10-06 20:59:45,689 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 39784 transitions. Word has length 23 [2021-10-06 20:59:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:45,689 INFO L470 AbstractCegarLoop]: Abstraction has 8192 states and 39784 transitions. [2021-10-06 20:59:45,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 39784 transitions. [2021-10-06 20:59:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:45,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:45,712 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:45,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2021-10-06 20:59:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:45,913 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1649260766, now seen corresponding path program 47 times [2021-10-06 20:59:45,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:45,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835225291] [2021-10-06 20:59:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 20:59:45,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:45,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:45,917 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:45,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-10-06 20:59:46,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:59:46,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 20:59:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:46,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:47,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:47,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835225291] [2021-10-06 20:59:47,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835225291] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:47,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:47,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:47,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177208344] [2021-10-06 20:59:47,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:47,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:47,108 INFO L87 Difference]: Start difference. First operand 8192 states and 39784 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:49,473 INFO L93 Difference]: Finished difference Result 17276 states and 77640 transitions. [2021-10-06 20:59:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 20:59:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:49,535 INFO L225 Difference]: With dead ends: 17276 [2021-10-06 20:59:49,535 INFO L226 Difference]: Without dead ends: 17238 [2021-10-06 20:59:49,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1781.9ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 20:59:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2021-10-06 20:59:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 9308. [2021-10-06 20:59:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 9307 states have (on average 4.914365531320511) internal successors, (45738), 9307 states have internal predecessors, (45738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 45738 transitions. [2021-10-06 20:59:50,042 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 45738 transitions. Word has length 23 [2021-10-06 20:59:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:50,043 INFO L470 AbstractCegarLoop]: Abstraction has 9308 states and 45738 transitions. [2021-10-06 20:59:50,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 45738 transitions. [2021-10-06 20:59:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:50,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:50,066 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:50,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2021-10-06 20:59:50,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:50,267 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1759908250, now seen corresponding path program 48 times [2021-10-06 20:59:50,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:50,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579063995] [2021-10-06 20:59:50,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 20:59:50,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:50,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:50,271 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:50,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-10-06 20:59:50,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 20:59:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:51,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:51,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:51,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579063995] [2021-10-06 20:59:51,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579063995] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:51,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:51,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:51,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452312705] [2021-10-06 20:59:51,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:51,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:51,457 INFO L87 Difference]: Start difference. First operand 9308 states and 45738 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:53,622 INFO L93 Difference]: Finished difference Result 13702 states and 62345 transitions. [2021-10-06 20:59:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 20:59:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:53,670 INFO L225 Difference]: With dead ends: 13702 [2021-10-06 20:59:53,670 INFO L226 Difference]: Without dead ends: 13666 [2021-10-06 20:59:53,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1725.9ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-10-06 20:59:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13666 states. [2021-10-06 20:59:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13666 to 9694. [2021-10-06 20:59:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9694 states, 9693 states have (on average 4.931290622098421) internal successors, (47799), 9693 states have internal predecessors, (47799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9694 states to 9694 states and 47799 transitions. [2021-10-06 20:59:53,975 INFO L78 Accepts]: Start accepts. Automaton has 9694 states and 47799 transitions. Word has length 23 [2021-10-06 20:59:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:53,975 INFO L470 AbstractCegarLoop]: Abstraction has 9694 states and 47799 transitions. [2021-10-06 20:59:53,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 9694 states and 47799 transitions. [2021-10-06 20:59:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:53,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:53,999 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:54,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-10-06 20:59:54,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:54,200 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -968572694, now seen corresponding path program 49 times [2021-10-06 20:59:54,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:54,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373054457] [2021-10-06 20:59:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 20:59:54,202 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:54,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:54,203 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-10-06 20:59:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 20:59:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:54,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 20:59:55,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:55,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373054457] [2021-10-06 20:59:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373054457] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:55,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:55,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:55,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16015032] [2021-10-06 20:59:55,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:55,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:55,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:55,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:55,297 INFO L87 Difference]: Start difference. First operand 9694 states and 47799 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:56,153 INFO L93 Difference]: Finished difference Result 13100 states and 61207 transitions. [2021-10-06 20:59:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 20:59:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:56,205 INFO L225 Difference]: With dead ends: 13100 [2021-10-06 20:59:56,206 INFO L226 Difference]: Without dead ends: 12996 [2021-10-06 20:59:56,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-10-06 20:59:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12996 states. [2021-10-06 20:59:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12996 to 9092. [2021-10-06 20:59:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9092 states, 9091 states have (on average 4.9171708282917175) internal successors, (44702), 9091 states have internal predecessors, (44702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9092 states to 9092 states and 44702 transitions. [2021-10-06 20:59:56,494 INFO L78 Accepts]: Start accepts. Automaton has 9092 states and 44702 transitions. Word has length 23 [2021-10-06 20:59:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:56,494 INFO L470 AbstractCegarLoop]: Abstraction has 9092 states and 44702 transitions. [2021-10-06 20:59:56,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9092 states and 44702 transitions. [2021-10-06 20:59:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:56,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:56,516 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:56,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2021-10-06 20:59:56,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:56,717 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash -74924944, now seen corresponding path program 50 times [2021-10-06 20:59:56,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:56,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310861643] [2021-10-06 20:59:56,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 20:59:56,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:56,720 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:56,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-10-06 20:59:57,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 20:59:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 20:59:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 20:59:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 20:59:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:57,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 20:59:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 20:59:57,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 20:59:57,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310861643] [2021-10-06 20:59:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310861643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 20:59:57,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 20:59:57,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 20:59:57,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144580606] [2021-10-06 20:59:57,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 20:59:57,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 20:59:57,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 20:59:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 20:59:57,909 INFO L87 Difference]: Start difference. First operand 9092 states and 44702 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 20:59:58,871 INFO L93 Difference]: Finished difference Result 11956 states and 56380 transitions. [2021-10-06 20:59:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 20:59:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 20:59:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 20:59:58,922 INFO L225 Difference]: With dead ends: 11956 [2021-10-06 20:59:58,922 INFO L226 Difference]: Without dead ends: 11920 [2021-10-06 20:59:58,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-10-06 20:59:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11920 states. [2021-10-06 20:59:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11920 to 9366. [2021-10-06 20:59:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9366 states, 9365 states have (on average 4.913294180459157) internal successors, (46013), 9365 states have internal predecessors, (46013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9366 states to 9366 states and 46013 transitions. [2021-10-06 20:59:59,251 INFO L78 Accepts]: Start accepts. Automaton has 9366 states and 46013 transitions. Word has length 23 [2021-10-06 20:59:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 20:59:59,251 INFO L470 AbstractCegarLoop]: Abstraction has 9366 states and 46013 transitions. [2021-10-06 20:59:59,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 20:59:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9366 states and 46013 transitions. [2021-10-06 20:59:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 20:59:59,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 20:59:59,274 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 20:59:59,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2021-10-06 20:59:59,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 20:59:59,475 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 20:59:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 20:59:59,475 INFO L82 PathProgramCache]: Analyzing trace with hash -423649614, now seen corresponding path program 51 times [2021-10-06 20:59:59,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 20:59:59,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098455724] [2021-10-06 20:59:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 20:59:59,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 20:59:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 20:59:59,478 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 20:59:59,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-10-06 21:00:00,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:00:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:00,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:00:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:00,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:00,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:00,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098455724] [2021-10-06 21:00:00,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098455724] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:00,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:00,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:00:00,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940966652] [2021-10-06 21:00:00,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:00:00,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:00:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:00:00,579 INFO L87 Difference]: Start difference. First operand 9366 states and 46013 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:02,316 INFO L93 Difference]: Finished difference Result 11898 states and 55688 transitions. [2021-10-06 21:00:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:00:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:02,362 INFO L225 Difference]: With dead ends: 11898 [2021-10-06 21:00:02,363 INFO L226 Difference]: Without dead ends: 11858 [2021-10-06 21:00:02,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1275.5ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-10-06 21:00:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11858 states. [2021-10-06 21:00:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11858 to 9652. [2021-10-06 21:00:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9652 states, 9651 states have (on average 4.903844161226816) internal successors, (47327), 9651 states have internal predecessors, (47327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9652 states to 9652 states and 47327 transitions. [2021-10-06 21:00:02,669 INFO L78 Accepts]: Start accepts. Automaton has 9652 states and 47327 transitions. Word has length 23 [2021-10-06 21:00:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:02,670 INFO L470 AbstractCegarLoop]: Abstraction has 9652 states and 47327 transitions. [2021-10-06 21:00:02,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9652 states and 47327 transitions. [2021-10-06 21:00:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:02,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:02,693 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:02,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2021-10-06 21:00:02,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:02,894 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2099721122, now seen corresponding path program 52 times [2021-10-06 21:00:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:02,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394081922] [2021-10-06 21:00:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:00:02,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:02,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:02,899 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:02,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-10-06 21:00:03,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:00:03,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:00:03,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:03,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:03,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:03,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394081922] [2021-10-06 21:00:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394081922] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:03,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:00:03,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104864472] [2021-10-06 21:00:03,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:00:03,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:00:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:00:03,986 INFO L87 Difference]: Start difference. First operand 9652 states and 47327 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:05,444 INFO L93 Difference]: Finished difference Result 13046 states and 60506 transitions. [2021-10-06 21:00:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:00:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:05,488 INFO L225 Difference]: With dead ends: 13046 [2021-10-06 21:00:05,488 INFO L226 Difference]: Without dead ends: 13014 [2021-10-06 21:00:05,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1021.2ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-10-06 21:00:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13014 states. [2021-10-06 21:00:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13014 to 10158. [2021-10-06 21:00:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 4.910997341734764) internal successors, (49881), 10157 states have internal predecessors, (49881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 49881 transitions. [2021-10-06 21:00:05,918 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 49881 transitions. Word has length 23 [2021-10-06 21:00:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:05,918 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 49881 transitions. [2021-10-06 21:00:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 49881 transitions. [2021-10-06 21:00:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:05,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:05,944 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:05,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:06,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:06,145 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2075014200, now seen corresponding path program 53 times [2021-10-06 21:00:06,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:06,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469261899] [2021-10-06 21:00:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:00:06,147 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:06,149 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:06,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-10-06 21:00:06,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:00:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:00:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:06,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:07,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:07,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469261899] [2021-10-06 21:00:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469261899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:07,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:07,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:00:07,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322353726] [2021-10-06 21:00:07,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:00:07,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:00:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:00:07,222 INFO L87 Difference]: Start difference. First operand 10158 states and 49881 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:08,439 INFO L93 Difference]: Finished difference Result 12798 states and 59089 transitions. [2021-10-06 21:00:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:00:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:08,486 INFO L225 Difference]: With dead ends: 12798 [2021-10-06 21:00:08,486 INFO L226 Difference]: Without dead ends: 12798 [2021-10-06 21:00:08,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:00:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12798 states. [2021-10-06 21:00:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12798 to 10360. [2021-10-06 21:00:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10360 states, 10359 states have (on average 4.921807124239791) internal successors, (50985), 10359 states have internal predecessors, (50985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10360 states to 10360 states and 50985 transitions. [2021-10-06 21:00:08,932 INFO L78 Accepts]: Start accepts. Automaton has 10360 states and 50985 transitions. Word has length 23 [2021-10-06 21:00:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:08,933 INFO L470 AbstractCegarLoop]: Abstraction has 10360 states and 50985 transitions. [2021-10-06 21:00:08,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10360 states and 50985 transitions. [2021-10-06 21:00:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:08,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:08,959 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:08,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:09,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:09,160 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1497646762, now seen corresponding path program 54 times [2021-10-06 21:00:09,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:09,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608028202] [2021-10-06 21:00:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:00:09,162 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:09,164 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:09,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-10-06 21:00:09,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:00:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:09,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:00:09,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:10,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:10,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608028202] [2021-10-06 21:00:10,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608028202] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:10,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:10,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-06 21:00:10,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791366492] [2021-10-06 21:00:10,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:00:10,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:00:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:00:10,507 INFO L87 Difference]: Start difference. First operand 10360 states and 50985 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:13,420 INFO L93 Difference]: Finished difference Result 12892 states and 59866 transitions. [2021-10-06 21:00:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 21:00:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:13,484 INFO L225 Difference]: With dead ends: 12892 [2021-10-06 21:00:13,484 INFO L226 Difference]: Without dead ends: 12860 [2021-10-06 21:00:13,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1880.7ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 21:00:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12860 states. [2021-10-06 21:00:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12860 to 10632. [2021-10-06 21:00:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 10631 states have (on average 4.90123224532029) internal successors, (52105), 10631 states have internal predecessors, (52105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 52105 transitions. [2021-10-06 21:00:14,050 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 52105 transitions. Word has length 23 [2021-10-06 21:00:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:14,050 INFO L470 AbstractCegarLoop]: Abstraction has 10632 states and 52105 transitions. [2021-10-06 21:00:14,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 52105 transitions. [2021-10-06 21:00:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:14,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:14,075 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:14,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:14,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:14,276 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1118670620, now seen corresponding path program 55 times [2021-10-06 21:00:14,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:14,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398796575] [2021-10-06 21:00:14,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:00:14,279 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:14,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:14,279 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:14,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-10-06 21:00:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:00:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:15,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:15,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:15,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398796575] [2021-10-06 21:00:15,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398796575] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:15,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:15,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:15,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42382633] [2021-10-06 21:00:15,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:15,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:15,201 INFO L87 Difference]: Start difference. First operand 10632 states and 52105 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:15,848 INFO L93 Difference]: Finished difference Result 12108 states and 57898 transitions. [2021-10-06 21:00:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:00:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:15,892 INFO L225 Difference]: With dead ends: 12108 [2021-10-06 21:00:15,892 INFO L226 Difference]: Without dead ends: 11918 [2021-10-06 21:00:15,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:00:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-10-06 21:00:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 10742. [2021-10-06 21:00:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10742 states, 10741 states have (on average 4.886137231170282) internal successors, (52482), 10741 states have internal predecessors, (52482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10742 states to 10742 states and 52482 transitions. [2021-10-06 21:00:16,388 INFO L78 Accepts]: Start accepts. Automaton has 10742 states and 52482 transitions. Word has length 23 [2021-10-06 21:00:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:16,389 INFO L470 AbstractCegarLoop]: Abstraction has 10742 states and 52482 transitions. [2021-10-06 21:00:16,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10742 states and 52482 transitions. [2021-10-06 21:00:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:16,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:16,415 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:16,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:16,616 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1611518040, now seen corresponding path program 56 times [2021-10-06 21:00:16,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:16,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294319247] [2021-10-06 21:00:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:00:16,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:16,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:16,619 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:16,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-10-06 21:00:17,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:00:17,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:17,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:17,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:17,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294319247] [2021-10-06 21:00:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294319247] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:17,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:17,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:17,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371577642] [2021-10-06 21:00:17,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:17,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:17,700 INFO L87 Difference]: Start difference. First operand 10742 states and 52482 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:18,270 INFO L93 Difference]: Finished difference Result 13452 states and 62559 transitions. [2021-10-06 21:00:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:00:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:18,320 INFO L225 Difference]: With dead ends: 13452 [2021-10-06 21:00:18,320 INFO L226 Difference]: Without dead ends: 13452 [2021-10-06 21:00:18,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:00:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13452 states. [2021-10-06 21:00:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13452 to 11078. [2021-10-06 21:00:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 4.88913965875237) internal successors, (54157), 11077 states have internal predecessors, (54157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 54157 transitions. [2021-10-06 21:00:18,859 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 54157 transitions. Word has length 23 [2021-10-06 21:00:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 11078 states and 54157 transitions. [2021-10-06 21:00:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 54157 transitions. [2021-10-06 21:00:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:18,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:18,889 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:18,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-10-06 21:00:19,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:19,097 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1005820788, now seen corresponding path program 57 times [2021-10-06 21:00:19,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:19,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091404197] [2021-10-06 21:00:19,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:00:19,099 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:19,100 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-10-06 21:00:19,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:00:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:20,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:20,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091404197] [2021-10-06 21:00:20,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091404197] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:20,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:20,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:20,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005789489] [2021-10-06 21:00:20,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:20,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:20,266 INFO L87 Difference]: Start difference. First operand 11078 states and 54157 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:21,362 INFO L93 Difference]: Finished difference Result 12718 states and 59982 transitions. [2021-10-06 21:00:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:00:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:21,407 INFO L225 Difference]: With dead ends: 12718 [2021-10-06 21:00:21,407 INFO L226 Difference]: Without dead ends: 12600 [2021-10-06 21:00:21,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:00:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12600 states. [2021-10-06 21:00:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12600 to 11164. [2021-10-06 21:00:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.883991758487862) internal successors, (54520), 11163 states have internal predecessors, (54520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 54520 transitions. [2021-10-06 21:00:21,901 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 54520 transitions. Word has length 23 [2021-10-06 21:00:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 11164 states and 54520 transitions. [2021-10-06 21:00:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 54520 transitions. [2021-10-06 21:00:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:21,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:21,937 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:21,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:22,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:22,151 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 590924840, now seen corresponding path program 58 times [2021-10-06 21:00:22,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:22,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123319956] [2021-10-06 21:00:22,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:00:22,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:22,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:22,154 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:22,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-10-06 21:00:22,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:00:22,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:22,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:22,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:23,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:23,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:23,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123319956] [2021-10-06 21:00:23,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123319956] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:23,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:23,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:23,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895204654] [2021-10-06 21:00:23,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:23,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:23,192 INFO L87 Difference]: Start difference. First operand 11164 states and 54520 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:24,302 INFO L93 Difference]: Finished difference Result 12012 states and 57211 transitions. [2021-10-06 21:00:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:00:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:24,345 INFO L225 Difference]: With dead ends: 12012 [2021-10-06 21:00:24,345 INFO L226 Difference]: Without dead ends: 11926 [2021-10-06 21:00:24,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:00:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11926 states. [2021-10-06 21:00:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11926 to 11212. [2021-10-06 21:00:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11212 states, 11211 states have (on average 4.877174203906877) internal successors, (54678), 11211 states have internal predecessors, (54678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11212 states to 11212 states and 54678 transitions. [2021-10-06 21:00:24,790 INFO L78 Accepts]: Start accepts. Automaton has 11212 states and 54678 transitions. Word has length 23 [2021-10-06 21:00:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 11212 states and 54678 transitions. [2021-10-06 21:00:24,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11212 states and 54678 transitions. [2021-10-06 21:00:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:24,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:24,824 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:24,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-10-06 21:00:25,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:25,025 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1203738992, now seen corresponding path program 59 times [2021-10-06 21:00:25,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:25,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967717288] [2021-10-06 21:00:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:00:25,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:25,029 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:25,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-10-06 21:00:25,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:00:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:00:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:25,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:26,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:26,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967717288] [2021-10-06 21:00:26,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967717288] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:26,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:26,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:26,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901548561] [2021-10-06 21:00:26,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:26,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:26,300 INFO L87 Difference]: Start difference. First operand 11212 states and 54678 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:27,293 INFO L93 Difference]: Finished difference Result 13372 states and 63248 transitions. [2021-10-06 21:00:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:00:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:27,348 INFO L225 Difference]: With dead ends: 13372 [2021-10-06 21:00:27,348 INFO L226 Difference]: Without dead ends: 13270 [2021-10-06 21:00:27,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:00:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13270 states. [2021-10-06 21:00:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13270 to 11812. [2021-10-06 21:00:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11812 states, 11811 states have (on average 4.891626449919566) internal successors, (57775), 11811 states have internal predecessors, (57775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11812 states to 11812 states and 57775 transitions. [2021-10-06 21:00:27,814 INFO L78 Accepts]: Start accepts. Automaton has 11812 states and 57775 transitions. Word has length 23 [2021-10-06 21:00:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:27,815 INFO L470 AbstractCegarLoop]: Abstraction has 11812 states and 57775 transitions. [2021-10-06 21:00:27,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11812 states and 57775 transitions. [2021-10-06 21:00:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:27,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:27,839 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:27,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2021-10-06 21:00:28,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:28,040 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash -696436552, now seen corresponding path program 60 times [2021-10-06 21:00:28,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:28,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745549429] [2021-10-06 21:00:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:00:28,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:28,044 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:28,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-10-06 21:00:28,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:00:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:00:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:29,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:29,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745549429] [2021-10-06 21:00:29,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745549429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:29,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:29,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-06 21:00:29,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861911897] [2021-10-06 21:00:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:00:29,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:00:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:00:29,413 INFO L87 Difference]: Start difference. First operand 11812 states and 57775 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:35,495 INFO L93 Difference]: Finished difference Result 13516 states and 63467 transitions. [2021-10-06 21:00:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-06 21:00:35,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:35,550 INFO L225 Difference]: With dead ends: 13516 [2021-10-06 21:00:35,550 INFO L226 Difference]: Without dead ends: 13454 [2021-10-06 21:00:35,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 4027.6ms TimeCoverageRelationStatistics Valid=1240, Invalid=4310, Unknown=0, NotChecked=0, Total=5550 [2021-10-06 21:00:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13454 states. [2021-10-06 21:00:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13454 to 11960. [2021-10-06 21:00:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11960 states, 11959 states have (on average 4.891295258800903) internal successors, (58495), 11959 states have internal predecessors, (58495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11960 states to 11960 states and 58495 transitions. [2021-10-06 21:00:36,143 INFO L78 Accepts]: Start accepts. Automaton has 11960 states and 58495 transitions. Word has length 23 [2021-10-06 21:00:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:36,143 INFO L470 AbstractCegarLoop]: Abstraction has 11960 states and 58495 transitions. [2021-10-06 21:00:36,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11960 states and 58495 transitions. [2021-10-06 21:00:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:36,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:36,183 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:36,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:36,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:36,390 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash -985010656, now seen corresponding path program 61 times [2021-10-06 21:00:36,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:36,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401461605] [2021-10-06 21:00:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:00:36,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:36,394 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:36,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-10-06 21:00:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:00:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:37,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:37,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:37,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401461605] [2021-10-06 21:00:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401461605] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:37,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:37,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:37,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198440454] [2021-10-06 21:00:37,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:37,418 INFO L87 Difference]: Start difference. First operand 11960 states and 58495 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:38,391 INFO L93 Difference]: Finished difference Result 13304 states and 63690 transitions. [2021-10-06 21:00:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:00:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:38,439 INFO L225 Difference]: With dead ends: 13304 [2021-10-06 21:00:38,440 INFO L226 Difference]: Without dead ends: 13182 [2021-10-06 21:00:38,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:00:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13182 states. [2021-10-06 21:00:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13182 to 12394. [2021-10-06 21:00:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12394 states, 12393 states have (on average 4.887033002501412) internal successors, (60565), 12393 states have internal predecessors, (60565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12394 states to 12394 states and 60565 transitions. [2021-10-06 21:00:38,890 INFO L78 Accepts]: Start accepts. Automaton has 12394 states and 60565 transitions. Word has length 23 [2021-10-06 21:00:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:38,890 INFO L470 AbstractCegarLoop]: Abstraction has 12394 states and 60565 transitions. [2021-10-06 21:00:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12394 states and 60565 transitions. [2021-10-06 21:00:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:38,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:38,928 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:38,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:39,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:39,130 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1617036512, now seen corresponding path program 62 times [2021-10-06 21:00:39,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:39,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954076670] [2021-10-06 21:00:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:00:39,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:39,134 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-10-06 21:00:40,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:00:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:00:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:40,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:40,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:40,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954076670] [2021-10-06 21:00:40,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954076670] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:40,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:40,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:00:40,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253556836] [2021-10-06 21:00:40,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:00:40,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:00:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:00:40,540 INFO L87 Difference]: Start difference. First operand 12394 states and 60565 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:43,110 INFO L93 Difference]: Finished difference Result 15090 states and 70899 transitions. [2021-10-06 21:00:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 21:00:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:43,160 INFO L225 Difference]: With dead ends: 15090 [2021-10-06 21:00:43,160 INFO L226 Difference]: Without dead ends: 15024 [2021-10-06 21:00:43,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1713.7ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:00:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15024 states. [2021-10-06 21:00:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15024 to 12740. [2021-10-06 21:00:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12740 states, 12739 states have (on average 4.900384645576576) internal successors, (62426), 12739 states have internal predecessors, (62426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12740 states to 12740 states and 62426 transitions. [2021-10-06 21:00:43,594 INFO L78 Accepts]: Start accepts. Automaton has 12740 states and 62426 transitions. Word has length 23 [2021-10-06 21:00:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:43,595 INFO L470 AbstractCegarLoop]: Abstraction has 12740 states and 62426 transitions. [2021-10-06 21:00:43,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 12740 states and 62426 transitions. [2021-10-06 21:00:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:43,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:43,629 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:43,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:43,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:43,830 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -649839176, now seen corresponding path program 63 times [2021-10-06 21:00:43,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:43,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69655986] [2021-10-06 21:00:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:00:43,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:43,834 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:43,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-10-06 21:00:44,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:00:44,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:00:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:44,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:45,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:45,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69655986] [2021-10-06 21:00:45,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69655986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:45,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:45,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:00:45,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369567671] [2021-10-06 21:00:45,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:00:45,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:00:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:00:45,191 INFO L87 Difference]: Start difference. First operand 12740 states and 62426 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:47,324 INFO L93 Difference]: Finished difference Result 15274 states and 71734 transitions. [2021-10-06 21:00:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:00:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:47,380 INFO L225 Difference]: With dead ends: 15274 [2021-10-06 21:00:47,380 INFO L226 Difference]: Without dead ends: 15250 [2021-10-06 21:00:47,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1584.0ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:00:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15250 states. [2021-10-06 21:00:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15250 to 13246. [2021-10-06 21:00:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13246 states, 13245 states have (on average 4.904643261608154) internal successors, (64962), 13245 states have internal predecessors, (64962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13246 states to 13246 states and 64962 transitions. [2021-10-06 21:00:48,101 INFO L78 Accepts]: Start accepts. Automaton has 13246 states and 64962 transitions. Word has length 23 [2021-10-06 21:00:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:48,101 INFO L470 AbstractCegarLoop]: Abstraction has 13246 states and 64962 transitions. [2021-10-06 21:00:48,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13246 states and 64962 transitions. [2021-10-06 21:00:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:48,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:48,141 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:48,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2021-10-06 21:00:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:48,342 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -989038568, now seen corresponding path program 64 times [2021-10-06 21:00:48,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:48,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835574036] [2021-10-06 21:00:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:00:48,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:48,346 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:48,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-10-06 21:00:49,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:00:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:49,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:49,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:00:49,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:49,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835574036] [2021-10-06 21:00:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835574036] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:49,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:49,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:49,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174291350] [2021-10-06 21:00:49,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:49,561 INFO L87 Difference]: Start difference. First operand 13246 states and 64962 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:50,144 INFO L93 Difference]: Finished difference Result 16684 states and 78474 transitions. [2021-10-06 21:00:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:00:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:50,206 INFO L225 Difference]: With dead ends: 16684 [2021-10-06 21:00:50,206 INFO L226 Difference]: Without dead ends: 16670 [2021-10-06 21:00:50,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:00:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16670 states. [2021-10-06 21:00:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16670 to 13810. [2021-10-06 21:00:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13810 states, 13809 states have (on average 4.931711202838728) internal successors, (68102), 13809 states have internal predecessors, (68102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13810 states to 13810 states and 68102 transitions. [2021-10-06 21:00:50,735 INFO L78 Accepts]: Start accepts. Automaton has 13810 states and 68102 transitions. Word has length 23 [2021-10-06 21:00:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:50,735 INFO L470 AbstractCegarLoop]: Abstraction has 13810 states and 68102 transitions. [2021-10-06 21:00:50,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13810 states and 68102 transitions. [2021-10-06 21:00:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:50,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:50,876 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:50,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:51,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:51,076 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1401285400, now seen corresponding path program 65 times [2021-10-06 21:00:51,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:51,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349991907] [2021-10-06 21:00:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:00:51,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:51,080 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:51,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-10-06 21:00:51,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:00:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:00:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:51,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:52,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:52,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349991907] [2021-10-06 21:00:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349991907] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:52,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:52,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:52,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832618202] [2021-10-06 21:00:52,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:52,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:52,291 INFO L87 Difference]: Start difference. First operand 13810 states and 68102 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:53,234 INFO L93 Difference]: Finished difference Result 16696 states and 79265 transitions. [2021-10-06 21:00:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:00:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:53,296 INFO L225 Difference]: With dead ends: 16696 [2021-10-06 21:00:53,296 INFO L226 Difference]: Without dead ends: 16584 [2021-10-06 21:00:53,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:00:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16584 states. [2021-10-06 21:00:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16584 to 14078. [2021-10-06 21:00:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14078 states, 14077 states have (on average 4.941109611422888) internal successors, (69556), 14077 states have internal predecessors, (69556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14078 states to 14078 states and 69556 transitions. [2021-10-06 21:00:54,053 INFO L78 Accepts]: Start accepts. Automaton has 14078 states and 69556 transitions. Word has length 23 [2021-10-06 21:00:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:54,053 INFO L470 AbstractCegarLoop]: Abstraction has 14078 states and 69556 transitions. [2021-10-06 21:00:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 14078 states and 69556 transitions. [2021-10-06 21:00:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:54,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:54,089 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:54,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-10-06 21:00:54,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:54,298 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash 792796886, now seen corresponding path program 66 times [2021-10-06 21:00:54,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:54,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729374157] [2021-10-06 21:00:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:00:54,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:54,305 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:54,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-10-06 21:00:55,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:00:55,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:00:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:55,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:55,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:55,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729374157] [2021-10-06 21:00:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729374157] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:55,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:55,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:55,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839969245] [2021-10-06 21:00:55,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:55,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:55,394 INFO L87 Difference]: Start difference. First operand 14078 states and 69556 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:56,408 INFO L93 Difference]: Finished difference Result 15100 states and 72774 transitions. [2021-10-06 21:00:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:00:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:56,463 INFO L225 Difference]: With dead ends: 15100 [2021-10-06 21:00:56,463 INFO L226 Difference]: Without dead ends: 14990 [2021-10-06 21:00:56,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:00:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14990 states. [2021-10-06 21:00:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14990 to 14236. [2021-10-06 21:00:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14236 states, 14235 states have (on average 4.917948717948718) internal successors, (70007), 14235 states have internal predecessors, (70007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14236 states to 14236 states and 70007 transitions. [2021-10-06 21:00:56,971 INFO L78 Accepts]: Start accepts. Automaton has 14236 states and 70007 transitions. Word has length 23 [2021-10-06 21:00:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:56,971 INFO L470 AbstractCegarLoop]: Abstraction has 14236 states and 70007 transitions. [2021-10-06 21:00:56,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 14236 states and 70007 transitions. [2021-10-06 21:00:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:57,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:57,139 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:57,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:57,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:57,339 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1903397276, now seen corresponding path program 67 times [2021-10-06 21:00:57,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:57,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393220125] [2021-10-06 21:00:57,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:00:57,342 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:57,345 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-10-06 21:00:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:00:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:00:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:00:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:58,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:00:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:00:58,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:00:58,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393220125] [2021-10-06 21:00:58,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393220125] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:00:58,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:00:58,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:00:58,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984242366] [2021-10-06 21:00:58,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:00:58,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:00:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:00:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:00:58,387 INFO L87 Difference]: Start difference. First operand 14236 states and 70007 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-10-06 21:00:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:00:58,887 INFO L93 Difference]: Finished difference Result 15820 states and 76070 transitions. [2021-10-06 21:00:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:00:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:00:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:00:58,947 INFO L225 Difference]: With dead ends: 15820 [2021-10-06 21:00:58,947 INFO L226 Difference]: Without dead ends: 15690 [2021-10-06 21:00:58,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:00:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15690 states. [2021-10-06 21:00:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15690 to 14248. [2021-10-06 21:00:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14248 states, 14247 states have (on average 4.913455464308275) internal successors, (70002), 14247 states have internal predecessors, (70002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:00:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14248 states to 14248 states and 70002 transitions. [2021-10-06 21:00:59,540 INFO L78 Accepts]: Start accepts. Automaton has 14248 states and 70002 transitions. Word has length 23 [2021-10-06 21:00:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:00:59,540 INFO L470 AbstractCegarLoop]: Abstraction has 14248 states and 70002 transitions. [2021-10-06 21:00:59,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-10-06 21:00:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14248 states and 70002 transitions. [2021-10-06 21:00:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:00:59,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:00:59,710 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:00:59,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2021-10-06 21:00:59,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:00:59,920 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:00:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:00:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash 642027406, now seen corresponding path program 68 times [2021-10-06 21:00:59,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:00:59,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331168093] [2021-10-06 21:00:59,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:00:59,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:00:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:00:59,923 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:00:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-10-06 21:01:00,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:01:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:01:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:01,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:01,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331168093] [2021-10-06 21:01:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331168093] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:01,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:01,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:01,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188421879] [2021-10-06 21:01:01,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:01,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:01,043 INFO L87 Difference]: Start difference. First operand 14248 states and 70002 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-10-06 21:01:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:01,640 INFO L93 Difference]: Finished difference Result 17726 states and 82886 transitions. [2021-10-06 21:01:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:01:01,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:01,720 INFO L225 Difference]: With dead ends: 17726 [2021-10-06 21:01:01,721 INFO L226 Difference]: Without dead ends: 17720 [2021-10-06 21:01:01,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:01:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2021-10-06 21:01:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 14284. [2021-10-06 21:01:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14284 states, 14283 states have (on average 4.907792480571309) internal successors, (70098), 14283 states have internal predecessors, (70098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14284 states to 14284 states and 70098 transitions. [2021-10-06 21:01:02,396 INFO L78 Accepts]: Start accepts. Automaton has 14284 states and 70098 transitions. Word has length 23 [2021-10-06 21:01:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:02,397 INFO L470 AbstractCegarLoop]: Abstraction has 14284 states and 70098 transitions. [2021-10-06 21:01:02,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-10-06 21:01:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14284 states and 70098 transitions. [2021-10-06 21:01:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:02,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:02,433 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:02,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2021-10-06 21:01:02,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:02,640 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash -716690844, now seen corresponding path program 69 times [2021-10-06 21:01:02,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:02,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116714793] [2021-10-06 21:01:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:01:02,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:02,643 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:02,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-10-06 21:01:03,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:01:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:01:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:03,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:03,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116714793] [2021-10-06 21:01:03,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116714793] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:03,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:03,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:03,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738490090] [2021-10-06 21:01:03,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:03,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:03,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:03,785 INFO L87 Difference]: Start difference. First operand 14284 states and 70098 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:04,536 INFO L93 Difference]: Finished difference Result 16178 states and 77037 transitions. [2021-10-06 21:01:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:01:04,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:04,756 INFO L225 Difference]: With dead ends: 16178 [2021-10-06 21:01:04,756 INFO L226 Difference]: Without dead ends: 15892 [2021-10-06 21:01:04,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:01:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15892 states. [2021-10-06 21:01:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15892 to 14176. [2021-10-06 21:01:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14176 states, 14175 states have (on average 4.909911816578483) internal successors, (69598), 14175 states have internal predecessors, (69598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14176 states to 14176 states and 69598 transitions. [2021-10-06 21:01:05,435 INFO L78 Accepts]: Start accepts. Automaton has 14176 states and 69598 transitions. Word has length 23 [2021-10-06 21:01:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:05,435 INFO L470 AbstractCegarLoop]: Abstraction has 14176 states and 69598 transitions. [2021-10-06 21:01:05,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 14176 states and 69598 transitions. [2021-10-06 21:01:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:05,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:05,470 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:05,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2021-10-06 21:01:05,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:05,671 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1095037614, now seen corresponding path program 70 times [2021-10-06 21:01:05,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:05,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346794703] [2021-10-06 21:01:05,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:01:05,673 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:05,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:05,675 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:05,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-10-06 21:01:06,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:01:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:06,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:01:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:06,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:06,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:06,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346794703] [2021-10-06 21:01:06,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346794703] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:06,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:06,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:06,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587494457] [2021-10-06 21:01:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:06,744 INFO L87 Difference]: Start difference. First operand 14176 states and 69598 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:07,559 INFO L93 Difference]: Finished difference Result 15452 states and 74154 transitions. [2021-10-06 21:01:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:01:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:07,799 INFO L225 Difference]: With dead ends: 15452 [2021-10-06 21:01:07,799 INFO L226 Difference]: Without dead ends: 15436 [2021-10-06 21:01:07,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:01:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15436 states. [2021-10-06 21:01:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15436 to 14268. [2021-10-06 21:01:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14268 states, 14267 states have (on average 4.907128338122941) internal successors, (70010), 14267 states have internal predecessors, (70010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 70010 transitions. [2021-10-06 21:01:08,278 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 70010 transitions. Word has length 23 [2021-10-06 21:01:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:08,278 INFO L470 AbstractCegarLoop]: Abstraction has 14268 states and 70010 transitions. [2021-10-06 21:01:08,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 70010 transitions. [2021-10-06 21:01:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:08,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:08,311 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:08,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2021-10-06 21:01:08,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:08,521 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2139280470, now seen corresponding path program 71 times [2021-10-06 21:01:08,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:08,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515601872] [2021-10-06 21:01:08,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:01:08,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:08,524 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:08,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-10-06 21:01:09,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:01:09,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:01:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:09,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:09,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:09,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515601872] [2021-10-06 21:01:09,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515601872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:09,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567759006] [2021-10-06 21:01:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:09,619 INFO L87 Difference]: Start difference. First operand 14268 states and 70010 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:10,466 INFO L93 Difference]: Finished difference Result 16424 states and 78948 transitions. [2021-10-06 21:01:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:01:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:10,535 INFO L225 Difference]: With dead ends: 16424 [2021-10-06 21:01:10,535 INFO L226 Difference]: Without dead ends: 16320 [2021-10-06 21:01:10,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:01:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16320 states. [2021-10-06 21:01:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16320 to 14866. [2021-10-06 21:01:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14866 states, 14865 states have (on average 4.924117053481332) internal successors, (73197), 14865 states have internal predecessors, (73197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14866 states to 14866 states and 73197 transitions. [2021-10-06 21:01:11,171 INFO L78 Accepts]: Start accepts. Automaton has 14866 states and 73197 transitions. Word has length 23 [2021-10-06 21:01:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 14866 states and 73197 transitions. [2021-10-06 21:01:11,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14866 states and 73197 transitions. [2021-10-06 21:01:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:11,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:11,209 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:11,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:11,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:11,410 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1523660970, now seen corresponding path program 72 times [2021-10-06 21:01:11,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:11,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168853475] [2021-10-06 21:01:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:01:11,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:11,414 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:11,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-10-06 21:01:12,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:01:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:01:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:12,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:12,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:12,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168853475] [2021-10-06 21:01:12,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168853475] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:12,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:12,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:12,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740514363] [2021-10-06 21:01:12,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:12,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:12,644 INFO L87 Difference]: Start difference. First operand 14866 states and 73197 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:13,319 INFO L93 Difference]: Finished difference Result 17834 states and 83235 transitions. [2021-10-06 21:01:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 21:01:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:13,381 INFO L225 Difference]: With dead ends: 17834 [2021-10-06 21:01:13,381 INFO L226 Difference]: Without dead ends: 17810 [2021-10-06 21:01:13,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:01:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2021-10-06 21:01:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 14824. [2021-10-06 21:01:13,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14824 states, 14823 states have (on average 4.918370100519463) internal successors, (72905), 14823 states have internal predecessors, (72905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14824 states to 14824 states and 72905 transitions. [2021-10-06 21:01:13,923 INFO L78 Accepts]: Start accepts. Automaton has 14824 states and 72905 transitions. Word has length 23 [2021-10-06 21:01:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 14824 states and 72905 transitions. [2021-10-06 21:01:13,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14824 states and 72905 transitions. [2021-10-06 21:01:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:13,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:13,962 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:13,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2021-10-06 21:01:14,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:14,170 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -800188290, now seen corresponding path program 73 times [2021-10-06 21:01:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:14,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56617744] [2021-10-06 21:01:14,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:01:14,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:14,173 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:14,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-10-06 21:01:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:01:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:01:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:15,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:15,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:15,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56617744] [2021-10-06 21:01:15,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56617744] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:15,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:15,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:01:15,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107001583] [2021-10-06 21:01:15,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:01:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:01:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:01:15,589 INFO L87 Difference]: Start difference. First operand 14824 states and 72905 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:17,647 INFO L93 Difference]: Finished difference Result 17724 states and 83868 transitions. [2021-10-06 21:01:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:01:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:17,723 INFO L225 Difference]: With dead ends: 17724 [2021-10-06 21:01:17,723 INFO L226 Difference]: Without dead ends: 17632 [2021-10-06 21:01:17,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1423.6ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:01:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17632 states. [2021-10-06 21:01:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17632 to 14600. [2021-10-06 21:01:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14600 states, 14599 states have (on average 4.919104048222481) internal successors, (71814), 14599 states have internal predecessors, (71814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 71814 transitions. [2021-10-06 21:01:18,442 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 71814 transitions. Word has length 23 [2021-10-06 21:01:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:18,442 INFO L470 AbstractCegarLoop]: Abstraction has 14600 states and 71814 transitions. [2021-10-06 21:01:18,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 71814 transitions. [2021-10-06 21:01:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:18,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:18,479 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:18,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:18,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:18,680 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:18,681 INFO L82 PathProgramCache]: Analyzing trace with hash 39954110, now seen corresponding path program 74 times [2021-10-06 21:01:18,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:18,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905048820] [2021-10-06 21:01:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:01:18,682 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:18,684 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-10-06 21:01:19,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:01:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:01:19,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:19,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:19,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:19,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905048820] [2021-10-06 21:01:19,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905048820] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:19,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:19,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:19,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487556415] [2021-10-06 21:01:19,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:19,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:19,873 INFO L87 Difference]: Start difference. First operand 14600 states and 71814 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:21,309 INFO L93 Difference]: Finished difference Result 15816 states and 75960 transitions. [2021-10-06 21:01:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:01:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:21,367 INFO L225 Difference]: With dead ends: 15816 [2021-10-06 21:01:21,367 INFO L226 Difference]: Without dead ends: 15772 [2021-10-06 21:01:21,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:01:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15772 states. [2021-10-06 21:01:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15772 to 14782. [2021-10-06 21:01:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14782 states, 14781 states have (on average 4.911372708206481) internal successors, (72595), 14781 states have internal predecessors, (72595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14782 states to 14782 states and 72595 transitions. [2021-10-06 21:01:21,899 INFO L78 Accepts]: Start accepts. Automaton has 14782 states and 72595 transitions. Word has length 23 [2021-10-06 21:01:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:21,899 INFO L470 AbstractCegarLoop]: Abstraction has 14782 states and 72595 transitions. [2021-10-06 21:01:21,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 14782 states and 72595 transitions. [2021-10-06 21:01:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:21,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:21,944 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:21,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:22,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:22,145 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1100603322, now seen corresponding path program 75 times [2021-10-06 21:01:22,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:22,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978789535] [2021-10-06 21:01:22,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:01:22,147 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:22,149 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:22,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-10-06 21:01:23,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:01:23,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:01:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:23,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:23,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:23,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978789535] [2021-10-06 21:01:23,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978789535] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:23,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:23,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:23,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115522307] [2021-10-06 21:01:23,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:23,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:23,525 INFO L87 Difference]: Start difference. First operand 14782 states and 72595 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:24,820 INFO L93 Difference]: Finished difference Result 17526 states and 83944 transitions. [2021-10-06 21:01:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:01:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:24,886 INFO L225 Difference]: With dead ends: 17526 [2021-10-06 21:01:24,886 INFO L226 Difference]: Without dead ends: 17432 [2021-10-06 21:01:24,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:01:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17432 states. [2021-10-06 21:01:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17432 to 15326. [2021-10-06 21:01:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15326 states, 15325 states have (on average 4.941794453507341) internal successors, (75733), 15325 states have internal predecessors, (75733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15326 states to 15326 states and 75733 transitions. [2021-10-06 21:01:25,487 INFO L78 Accepts]: Start accepts. Automaton has 15326 states and 75733 transitions. Word has length 23 [2021-10-06 21:01:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 15326 states and 75733 transitions. [2021-10-06 21:01:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 15326 states and 75733 transitions. [2021-10-06 21:01:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:25,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:25,527 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:25,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2021-10-06 21:01:25,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:25,728 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash 468577466, now seen corresponding path program 76 times [2021-10-06 21:01:25,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:25,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892106965] [2021-10-06 21:01:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:01:25,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:25,731 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:25,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-10-06 21:01:26,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:01:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:01:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:27,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:27,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892106965] [2021-10-06 21:01:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892106965] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:27,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:01:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361043149] [2021-10-06 21:01:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:01:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:01:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:01:27,169 INFO L87 Difference]: Start difference. First operand 15326 states and 75733 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:28,809 INFO L93 Difference]: Finished difference Result 22350 states and 103833 transitions. [2021-10-06 21:01:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 21:01:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:29,059 INFO L225 Difference]: With dead ends: 22350 [2021-10-06 21:01:29,059 INFO L226 Difference]: Without dead ends: 22312 [2021-10-06 21:01:29,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 992.9ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-10-06 21:01:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22312 states. [2021-10-06 21:01:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22312 to 16536. [2021-10-06 21:01:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16536 states, 16535 states have (on average 5.000604777744179) internal successors, (82685), 16535 states have internal predecessors, (82685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16536 states to 16536 states and 82685 transitions. [2021-10-06 21:01:29,747 INFO L78 Accepts]: Start accepts. Automaton has 16536 states and 82685 transitions. Word has length 23 [2021-10-06 21:01:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:29,747 INFO L470 AbstractCegarLoop]: Abstraction has 16536 states and 82685 transitions. [2021-10-06 21:01:29,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16536 states and 82685 transitions. [2021-10-06 21:01:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:29,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:29,789 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:29,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:29,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:29,990 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 570016048, now seen corresponding path program 77 times [2021-10-06 21:01:29,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:29,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915409420] [2021-10-06 21:01:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:01:29,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:29,993 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:29,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-10-06 21:01:30,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:01:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:01:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:31,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:01:31,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915409420] [2021-10-06 21:01:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915409420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:31,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:01:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797601763] [2021-10-06 21:01:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:01:31,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:01:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:01:31,262 INFO L87 Difference]: Start difference. First operand 16536 states and 82685 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:32,175 INFO L93 Difference]: Finished difference Result 18930 states and 91682 transitions. [2021-10-06 21:01:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:01:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:32,246 INFO L225 Difference]: With dead ends: 18930 [2021-10-06 21:01:32,247 INFO L226 Difference]: Without dead ends: 18808 [2021-10-06 21:01:32,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:01:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18808 states. [2021-10-06 21:01:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18808 to 16836. [2021-10-06 21:01:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16836 states, 16835 states have (on average 5.005880605880606) internal successors, (84274), 16835 states have internal predecessors, (84274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16836 states to 16836 states and 84274 transitions. [2021-10-06 21:01:33,009 INFO L78 Accepts]: Start accepts. Automaton has 16836 states and 84274 transitions. Word has length 23 [2021-10-06 21:01:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 16836 states and 84274 transitions. [2021-10-06 21:01:33,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 16836 states and 84274 transitions. [2021-10-06 21:01:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:01:33,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:33,052 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:33,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-10-06 21:01:33,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:33,253 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash 823788472, now seen corresponding path program 78 times [2021-10-06 21:01:33,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:33,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654041482] [2021-10-06 21:01:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:01:33,255 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:33,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:33,256 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:33,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-10-06 21:01:34,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:01:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:01:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:34,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:34,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:34,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654041482] [2021-10-06 21:01:34,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654041482] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:34,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:34,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:01:34,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306910797] [2021-10-06 21:01:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:01:34,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:01:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:01:34,636 INFO L87 Difference]: Start difference. First operand 16836 states and 84274 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:37,200 INFO L93 Difference]: Finished difference Result 22480 states and 105430 transitions. [2021-10-06 21:01:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:01:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:01:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:37,284 INFO L225 Difference]: With dead ends: 22480 [2021-10-06 21:01:37,284 INFO L226 Difference]: Without dead ends: 22394 [2021-10-06 21:01:37,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1513.9ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-10-06 21:01:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22394 states. [2021-10-06 21:01:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22394 to 16758. [2021-10-06 21:01:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 5.017365876946948) internal successors, (84076), 16757 states have internal predecessors, (84076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 84076 transitions. [2021-10-06 21:01:38,051 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 84076 transitions. Word has length 23 [2021-10-06 21:01:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:38,051 INFO L470 AbstractCegarLoop]: Abstraction has 16758 states and 84076 transitions. [2021-10-06 21:01:38,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 84076 transitions. [2021-10-06 21:01:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:01:38,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:38,097 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:38,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:38,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:38,298 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1279181211, now seen corresponding path program 79 times [2021-10-06 21:01:38,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:38,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484446786] [2021-10-06 21:01:38,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:01:38,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:38,301 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:38,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-10-06 21:01:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:01:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:01:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:39,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:39,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:39,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484446786] [2021-10-06 21:01:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484446786] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:39,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:39,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-06 21:01:39,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973776665] [2021-10-06 21:01:39,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:01:39,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:01:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:01:39,660 INFO L87 Difference]: Start difference. First operand 16758 states and 84076 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:41,585 INFO L93 Difference]: Finished difference Result 18796 states and 92527 transitions. [2021-10-06 21:01:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 21:01:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:01:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:41,666 INFO L225 Difference]: With dead ends: 18796 [2021-10-06 21:01:41,666 INFO L226 Difference]: Without dead ends: 18764 [2021-10-06 21:01:41,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1046.8ms TimeCoverageRelationStatistics Valid=365, Invalid=1195, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:01:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18764 states. [2021-10-06 21:01:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18764 to 16482. [2021-10-06 21:01:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16482 states, 16481 states have (on average 5.015472362113949) internal successors, (82660), 16481 states have internal predecessors, (82660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16482 states to 16482 states and 82660 transitions. [2021-10-06 21:01:42,278 INFO L78 Accepts]: Start accepts. Automaton has 16482 states and 82660 transitions. Word has length 24 [2021-10-06 21:01:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 16482 states and 82660 transitions. [2021-10-06 21:01:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16482 states and 82660 transitions. [2021-10-06 21:01:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:01:42,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:42,321 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:42,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2021-10-06 21:01:42,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:42,522 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:42,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2006478377, now seen corresponding path program 80 times [2021-10-06 21:01:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:42,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725177796] [2021-10-06 21:01:42,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:01:42,524 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:42,525 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:42,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-10-06 21:01:43,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:01:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:01:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:43,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:44,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:44,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725177796] [2021-10-06 21:01:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725177796] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:44,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:44,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:01:44,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498474133] [2021-10-06 21:01:44,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:01:44,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:01:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:01:44,283 INFO L87 Difference]: Start difference. First operand 16482 states and 82660 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:46,951 INFO L93 Difference]: Finished difference Result 20516 states and 98598 transitions. [2021-10-06 21:01:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 21:01:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:01:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:47,032 INFO L225 Difference]: With dead ends: 20516 [2021-10-06 21:01:47,033 INFO L226 Difference]: Without dead ends: 20426 [2021-10-06 21:01:47,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1937.3ms TimeCoverageRelationStatistics Valid=324, Invalid=866, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:01:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-10-06 21:01:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17288. [2021-10-06 21:01:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17288 states, 17287 states have (on average 5.002660959102216) internal successors, (86481), 17287 states have internal predecessors, (86481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17288 states to 17288 states and 86481 transitions. [2021-10-06 21:01:47,589 INFO L78 Accepts]: Start accepts. Automaton has 17288 states and 86481 transitions. Word has length 24 [2021-10-06 21:01:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 17288 states and 86481 transitions. [2021-10-06 21:01:47,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17288 states and 86481 transitions. [2021-10-06 21:01:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:01:47,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:47,632 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:47,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:47,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:47,833 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1949696103, now seen corresponding path program 81 times [2021-10-06 21:01:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:47,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416994814] [2021-10-06 21:01:47,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:01:47,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:47,837 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:47,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-10-06 21:01:48,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:01:48,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:01:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:48,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:49,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:49,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416994814] [2021-10-06 21:01:49,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416994814] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:49,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:49,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-06 21:01:49,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143683651] [2021-10-06 21:01:49,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:01:49,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:01:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:01:49,463 INFO L87 Difference]: Start difference. First operand 17288 states and 86481 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:52,499 INFO L93 Difference]: Finished difference Result 21088 states and 101960 transitions. [2021-10-06 21:01:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-06 21:01:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:01:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:52,582 INFO L225 Difference]: With dead ends: 21088 [2021-10-06 21:01:52,582 INFO L226 Difference]: Without dead ends: 21056 [2021-10-06 21:01:52,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2027.5ms TimeCoverageRelationStatistics Valid=453, Invalid=1617, Unknown=0, NotChecked=0, Total=2070 [2021-10-06 21:01:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21056 states. [2021-10-06 21:01:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21056 to 17398. [2021-10-06 21:01:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 17397 states have (on average 4.999712594125424) internal successors, (86980), 17397 states have internal predecessors, (86980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 86980 transitions. [2021-10-06 21:01:53,366 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 86980 transitions. Word has length 24 [2021-10-06 21:01:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:53,366 INFO L470 AbstractCegarLoop]: Abstraction has 17398 states and 86980 transitions. [2021-10-06 21:01:53,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 86980 transitions. [2021-10-06 21:01:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:01:53,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:53,416 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:53,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:53,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:53,617 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:53,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1108375671, now seen corresponding path program 82 times [2021-10-06 21:01:53,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:53,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020071660] [2021-10-06 21:01:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:01:53,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:53,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:53,621 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-10-06 21:01:54,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:01:54,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:01:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:01:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:01:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:54,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:01:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:01:55,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:01:55,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020071660] [2021-10-06 21:01:55,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020071660] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:01:55,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:01:55,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-06 21:01:55,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458720129] [2021-10-06 21:01:55,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:01:55,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:01:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:01:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:01:55,136 INFO L87 Difference]: Start difference. First operand 17398 states and 86980 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:01:58,268 INFO L93 Difference]: Finished difference Result 20988 states and 101814 transitions. [2021-10-06 21:01:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-06 21:01:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 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 24 [2021-10-06 21:01:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:01:58,356 INFO L225 Difference]: With dead ends: 20988 [2021-10-06 21:01:58,356 INFO L226 Difference]: Without dead ends: 20986 [2021-10-06 21:01:58,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1817.6ms TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2021-10-06 21:01:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20986 states. [2021-10-06 21:01:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20986 to 17466. [2021-10-06 21:01:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17466 states, 17465 states have (on average 4.996507300314915) internal successors, (87264), 17465 states have internal predecessors, (87264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 87264 transitions. [2021-10-06 21:01:59,137 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 87264 transitions. Word has length 24 [2021-10-06 21:01:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:01:59,138 INFO L470 AbstractCegarLoop]: Abstraction has 17466 states and 87264 transitions. [2021-10-06 21:01:59,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:01:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 87264 transitions. [2021-10-06 21:01:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:01:59,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:01:59,183 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:01:59,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2021-10-06 21:01:59,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:01:59,389 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:01:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:01:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1362148095, now seen corresponding path program 83 times [2021-10-06 21:01:59,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:01:59,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731420005] [2021-10-06 21:01:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:01:59,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:01:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:01:59,392 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:01:59,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-10-06 21:02:00,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:02:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:00,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:02:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:00,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:00,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:00,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731420005] [2021-10-06 21:02:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731420005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:00,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:00,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:02:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904294163] [2021-10-06 21:02:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:02:00,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:02:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:02:00,550 INFO L87 Difference]: Start difference. First operand 17466 states and 87264 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:01,748 INFO L93 Difference]: Finished difference Result 21640 states and 104434 transitions. [2021-10-06 21:02:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 21:02:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:02:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:01,834 INFO L225 Difference]: With dead ends: 21640 [2021-10-06 21:02:01,835 INFO L226 Difference]: Without dead ends: 21634 [2021-10-06 21:02:01,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-10-06 21:02:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21634 states. [2021-10-06 21:02:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21634 to 17914. [2021-10-06 21:02:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17914 states, 17913 states have (on average 5.000502428403952) internal successors, (89574), 17913 states have internal predecessors, (89574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17914 states to 17914 states and 89574 transitions. [2021-10-06 21:02:02,659 INFO L78 Accepts]: Start accepts. Automaton has 17914 states and 89574 transitions. Word has length 24 [2021-10-06 21:02:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:02,659 INFO L470 AbstractCegarLoop]: Abstraction has 17914 states and 89574 transitions. [2021-10-06 21:02:02,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 17914 states and 89574 transitions. [2021-10-06 21:02:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:02,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:02,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:02,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2021-10-06 21:02:02,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:02,907 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash 797246055, now seen corresponding path program 84 times [2021-10-06 21:02:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:02,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109256411] [2021-10-06 21:02:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:02:02,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:02,910 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-10-06 21:02:03,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:02:03,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:02:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:04,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:04,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109256411] [2021-10-06 21:02:04,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109256411] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:04,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:04,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-06 21:02:04,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414852291] [2021-10-06 21:02:04,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:02:04,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:02:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:02:04,523 INFO L87 Difference]: Start difference. First operand 17914 states and 89574 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:11,678 INFO L93 Difference]: Finished difference Result 23298 states and 109506 transitions. [2021-10-06 21:02:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-06 21:02:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:11,922 INFO L225 Difference]: With dead ends: 23298 [2021-10-06 21:02:11,922 INFO L226 Difference]: Without dead ends: 23214 [2021-10-06 21:02:11,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 5094.0ms TimeCoverageRelationStatistics Valid=906, Invalid=4064, Unknown=0, NotChecked=0, Total=4970 [2021-10-06 21:02:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23214 states. [2021-10-06 21:02:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23214 to 18076. [2021-10-06 21:02:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18076 states, 18075 states have (on average 4.9964038727524205) internal successors, (90310), 18075 states have internal predecessors, (90310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18076 states to 18076 states and 90310 transitions. [2021-10-06 21:02:12,817 INFO L78 Accepts]: Start accepts. Automaton has 18076 states and 90310 transitions. Word has length 24 [2021-10-06 21:02:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:12,817 INFO L470 AbstractCegarLoop]: Abstraction has 18076 states and 90310 transitions. [2021-10-06 21:02:12,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18076 states and 90310 transitions. [2021-10-06 21:02:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:12,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:12,861 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:12,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (118)] Ended with exit code 0 [2021-10-06 21:02:13,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:13,062 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -865224507, now seen corresponding path program 85 times [2021-10-06 21:02:13,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:13,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626663659] [2021-10-06 21:02:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:02:13,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:13,066 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:13,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-10-06 21:02:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:02:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:02:14,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:14,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:14,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626663659] [2021-10-06 21:02:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626663659] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:14,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:14,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-06 21:02:14,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423772994] [2021-10-06 21:02:14,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:02:14,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:02:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:02:14,628 INFO L87 Difference]: Start difference. First operand 18076 states and 90310 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:17,587 INFO L93 Difference]: Finished difference Result 20866 states and 100475 transitions. [2021-10-06 21:02:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:02:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:17,681 INFO L225 Difference]: With dead ends: 20866 [2021-10-06 21:02:17,682 INFO L226 Difference]: Without dead ends: 20864 [2021-10-06 21:02:17,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1504.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1260, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 21:02:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20864 states. [2021-10-06 21:02:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20864 to 18374. [2021-10-06 21:02:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18374 states, 18373 states have (on average 5.002939095411746) internal successors, (91919), 18373 states have internal predecessors, (91919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18374 states to 18374 states and 91919 transitions. [2021-10-06 21:02:18,318 INFO L78 Accepts]: Start accepts. Automaton has 18374 states and 91919 transitions. Word has length 24 [2021-10-06 21:02:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:18,318 INFO L470 AbstractCegarLoop]: Abstraction has 18374 states and 91919 transitions. [2021-10-06 21:02:18,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18374 states and 91919 transitions. [2021-10-06 21:02:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:18,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:18,365 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:18,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2021-10-06 21:02:18,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:18,566 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash 724449031, now seen corresponding path program 86 times [2021-10-06 21:02:18,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:18,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260087193] [2021-10-06 21:02:18,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:02:18,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:18,569 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:18,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-10-06 21:02:19,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:02:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:02:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:20,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:20,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260087193] [2021-10-06 21:02:20,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260087193] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:20,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:20,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-10-06 21:02:20,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596948177] [2021-10-06 21:02:20,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:02:20,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:02:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:02:20,434 INFO L87 Difference]: Start difference. First operand 18374 states and 91919 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:25,494 INFO L93 Difference]: Finished difference Result 23626 states and 113903 transitions. [2021-10-06 21:02:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 21:02:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:25,780 INFO L225 Difference]: With dead ends: 23626 [2021-10-06 21:02:25,780 INFO L226 Difference]: Without dead ends: 23596 [2021-10-06 21:02:25,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3667.8ms TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-10-06 21:02:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23596 states. [2021-10-06 21:02:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23596 to 19582. [2021-10-06 21:02:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19582 states, 19581 states have (on average 5.0433072876768295) internal successors, (98753), 19581 states have internal predecessors, (98753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19582 states to 19582 states and 98753 transitions. [2021-10-06 21:02:26,440 INFO L78 Accepts]: Start accepts. Automaton has 19582 states and 98753 transitions. Word has length 24 [2021-10-06 21:02:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:26,440 INFO L470 AbstractCegarLoop]: Abstraction has 19582 states and 98753 transitions. [2021-10-06 21:02:26,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19582 states and 98753 transitions. [2021-10-06 21:02:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:26,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:26,493 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:26,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2021-10-06 21:02:26,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:26,694 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1898837495, now seen corresponding path program 87 times [2021-10-06 21:02:26,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:26,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350212738] [2021-10-06 21:02:26,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:02:26,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:26,698 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:26,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-10-06 21:02:27,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:02:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:02:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:28,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:28,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350212738] [2021-10-06 21:02:28,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350212738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:28,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:28,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:02:28,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934069005] [2021-10-06 21:02:28,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:02:28,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:02:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:02:28,561 INFO L87 Difference]: Start difference. First operand 19582 states and 98753 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:33,883 INFO L93 Difference]: Finished difference Result 45524 states and 220691 transitions. [2021-10-06 21:02:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-06 21:02:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:34,100 INFO L225 Difference]: With dead ends: 45524 [2021-10-06 21:02:34,100 INFO L226 Difference]: Without dead ends: 45378 [2021-10-06 21:02:34,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 3356.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-10-06 21:02:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45378 states. [2021-10-06 21:02:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45378 to 31876. [2021-10-06 21:02:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31876 states, 31875 states have (on average 5.242321568627451) internal successors, (167099), 31875 states have internal predecessors, (167099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31876 states to 31876 states and 167099 transitions. [2021-10-06 21:02:35,858 INFO L78 Accepts]: Start accepts. Automaton has 31876 states and 167099 transitions. Word has length 24 [2021-10-06 21:02:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:35,858 INFO L470 AbstractCegarLoop]: Abstraction has 31876 states and 167099 transitions. [2021-10-06 21:02:35,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31876 states and 167099 transitions. [2021-10-06 21:02:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:36,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:36,042 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:36,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2021-10-06 21:02:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:36,259 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash 891276001, now seen corresponding path program 88 times [2021-10-06 21:02:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:36,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940256999] [2021-10-06 21:02:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:02:36,261 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:36,262 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:36,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-10-06 21:02:37,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:02:37,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:02:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:37,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:37,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:37,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940256999] [2021-10-06 21:02:37,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940256999] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:37,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:37,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:02:37,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337456185] [2021-10-06 21:02:37,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:02:37,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:02:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:02:37,702 INFO L87 Difference]: Start difference. First operand 31876 states and 167099 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:39,774 INFO L93 Difference]: Finished difference Result 35990 states and 184279 transitions. [2021-10-06 21:02:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:02:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:39,941 INFO L225 Difference]: With dead ends: 35990 [2021-10-06 21:02:39,941 INFO L226 Difference]: Without dead ends: 35988 [2021-10-06 21:02:39,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-10-06 21:02:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-10-06 21:02:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 32990. [2021-10-06 21:02:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32990 states, 32989 states have (on average 5.24205038042984) internal successors, (172930), 32989 states have internal predecessors, (172930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32990 states to 32990 states and 172930 transitions. [2021-10-06 21:02:41,473 INFO L78 Accepts]: Start accepts. Automaton has 32990 states and 172930 transitions. Word has length 24 [2021-10-06 21:02:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 32990 states and 172930 transitions. [2021-10-06 21:02:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32990 states and 172930 transitions. [2021-10-06 21:02:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:41,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:41,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:41,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2021-10-06 21:02:41,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:41,767 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1291600121, now seen corresponding path program 89 times [2021-10-06 21:02:41,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:41,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751627944] [2021-10-06 21:02:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:02:41,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:41,770 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:41,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-10-06 21:02:42,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:02:42,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:42,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:02:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:43,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:02:43,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751627944] [2021-10-06 21:02:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751627944] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:43,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:43,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:02:43,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303639776] [2021-10-06 21:02:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:02:43,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:02:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:02:43,592 INFO L87 Difference]: Start difference. First operand 32990 states and 172930 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:02:46,531 INFO L93 Difference]: Finished difference Result 38120 states and 194608 transitions. [2021-10-06 21:02:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:02:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:02:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:02:46,716 INFO L225 Difference]: With dead ends: 38120 [2021-10-06 21:02:46,716 INFO L226 Difference]: Without dead ends: 38090 [2021-10-06 21:02:46,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1882.8ms TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-10-06 21:02:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38090 states. [2021-10-06 21:02:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38090 to 33532. [2021-10-06 21:02:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33532 states, 33531 states have (on average 5.227848856282247) internal successors, (175295), 33531 states have internal predecessors, (175295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33532 states to 33532 states and 175295 transitions. [2021-10-06 21:02:48,403 INFO L78 Accepts]: Start accepts. Automaton has 33532 states and 175295 transitions. Word has length 24 [2021-10-06 21:02:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:02:48,404 INFO L470 AbstractCegarLoop]: Abstraction has 33532 states and 175295 transitions. [2021-10-06 21:02:48,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:02:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33532 states and 175295 transitions. [2021-10-06 21:02:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:02:48,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:02:48,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:02:48,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-10-06 21:02:48,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:02:48,764 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:02:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:02:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1570671125, now seen corresponding path program 90 times [2021-10-06 21:02:48,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:02:48,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163060466] [2021-10-06 21:02:48,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:02:48,766 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:02:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:02:48,767 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:02:48,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-10-06 21:02:49,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:02:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:02:49,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:02:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:02:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:50,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:02:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:02:50,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:02:50,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163060466] [2021-10-06 21:02:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163060466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:02:50,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:02:50,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-06 21:02:50,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488959304] [2021-10-06 21:02:50,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:02:50,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:02:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:02:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:02:50,571 INFO L87 Difference]: Start difference. First operand 33532 states and 175295 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:03,399 INFO L93 Difference]: Finished difference Result 48020 states and 241361 transitions. [2021-10-06 21:03:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-06 21:03:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 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 24 [2021-10-06 21:03:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:03,692 INFO L225 Difference]: With dead ends: 48020 [2021-10-06 21:03:03,692 INFO L226 Difference]: Without dead ends: 47990 [2021-10-06 21:03:03,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 9332.6ms TimeCoverageRelationStatistics Valid=686, Invalid=2284, Unknown=0, NotChecked=0, Total=2970 [2021-10-06 21:03:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47990 states. [2021-10-06 21:03:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47990 to 34314. [2021-10-06 21:03:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34314 states, 34313 states have (on average 5.233701512546265) internal successors, (179584), 34313 states have internal predecessors, (179584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 179584 transitions. [2021-10-06 21:03:05,627 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 179584 transitions. Word has length 24 [2021-10-06 21:03:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 34314 states and 179584 transitions. [2021-10-06 21:03:05,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 179584 transitions. [2021-10-06 21:03:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:05,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:05,720 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:05,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2021-10-06 21:03:05,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:05,921 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2059252543, now seen corresponding path program 91 times [2021-10-06 21:03:05,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:05,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049372521] [2021-10-06 21:03:05,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:03:05,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:05,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:05,924 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:05,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2021-10-06 21:03:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:03:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:03:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:06,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:07,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:07,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049372521] [2021-10-06 21:03:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049372521] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:07,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:03:07,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469726495] [2021-10-06 21:03:07,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:03:07,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:03:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:03:07,213 INFO L87 Difference]: Start difference. First operand 34314 states and 179584 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:09,376 INFO L93 Difference]: Finished difference Result 41140 states and 206433 transitions. [2021-10-06 21:03:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-06 21:03:09,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:03:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:09,813 INFO L225 Difference]: With dead ends: 41140 [2021-10-06 21:03:09,814 INFO L226 Difference]: Without dead ends: 40910 [2021-10-06 21:03:09,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-10-06 21:03:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40910 states. [2021-10-06 21:03:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40910 to 32408. [2021-10-06 21:03:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32408 states, 32407 states have (on average 5.191717838738544) internal successors, (168248), 32407 states have internal predecessors, (168248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32408 states to 32408 states and 168248 transitions. [2021-10-06 21:03:11,247 INFO L78 Accepts]: Start accepts. Automaton has 32408 states and 168248 transitions. Word has length 24 [2021-10-06 21:03:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 32408 states and 168248 transitions. [2021-10-06 21:03:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32408 states and 168248 transitions. [2021-10-06 21:03:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:11,341 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:11,341 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:11,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2021-10-06 21:03:11,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:11,544 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:11,545 INFO L82 PathProgramCache]: Analyzing trace with hash -502795307, now seen corresponding path program 92 times [2021-10-06 21:03:11,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:11,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069263371] [2021-10-06 21:03:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:03:11,546 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:11,547 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:11,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-10-06 21:03:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:03:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:03:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:13,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:13,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069263371] [2021-10-06 21:03:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069263371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:13,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:13,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:03:13,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62363272] [2021-10-06 21:03:13,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:03:13,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:03:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:03:13,446 INFO L87 Difference]: Start difference. First operand 32408 states and 168248 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:19,602 INFO L93 Difference]: Finished difference Result 39402 states and 196484 transitions. [2021-10-06 21:03:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-06 21:03:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:03:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:19,803 INFO L225 Difference]: With dead ends: 39402 [2021-10-06 21:03:19,803 INFO L226 Difference]: Without dead ends: 39334 [2021-10-06 21:03:19,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4416.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 21:03:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39334 states. [2021-10-06 21:03:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39334 to 33458. [2021-10-06 21:03:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33458 states, 33457 states have (on average 5.199958155244045) internal successors, (173975), 33457 states have internal predecessors, (173975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33458 states to 33458 states and 173975 transitions. [2021-10-06 21:03:21,285 INFO L78 Accepts]: Start accepts. Automaton has 33458 states and 173975 transitions. Word has length 24 [2021-10-06 21:03:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:21,285 INFO L470 AbstractCegarLoop]: Abstraction has 33458 states and 173975 transitions. [2021-10-06 21:03:21,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 33458 states and 173975 transitions. [2021-10-06 21:03:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:21,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:21,785 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:21,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (126)] Ended with exit code 0 [2021-10-06 21:03:21,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:21,999 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash -421396251, now seen corresponding path program 93 times [2021-10-06 21:03:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:22,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340594795] [2021-10-06 21:03:22,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:03:22,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:22,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:22,002 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:22,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-10-06 21:03:23,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-06 21:03:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:23,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:03:23,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:23,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:23,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340594795] [2021-10-06 21:03:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340594795] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:23,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:03:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770918594] [2021-10-06 21:03:23,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:03:23,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:03:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:03:23,692 INFO L87 Difference]: Start difference. First operand 33458 states and 173975 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:27,931 INFO L93 Difference]: Finished difference Result 38924 states and 194391 transitions. [2021-10-06 21:03:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:03:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:03:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:28,092 INFO L225 Difference]: With dead ends: 38924 [2021-10-06 21:03:28,092 INFO L226 Difference]: Without dead ends: 38694 [2021-10-06 21:03:28,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2684.3ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 21:03:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38694 states. [2021-10-06 21:03:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38694 to 31880. [2021-10-06 21:03:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31880 states, 31879 states have (on average 5.18617271558079) internal successors, (165330), 31879 states have internal predecessors, (165330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31880 states to 31880 states and 165330 transitions. [2021-10-06 21:03:29,429 INFO L78 Accepts]: Start accepts. Automaton has 31880 states and 165330 transitions. Word has length 24 [2021-10-06 21:03:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:29,429 INFO L470 AbstractCegarLoop]: Abstraction has 31880 states and 165330 transitions. [2021-10-06 21:03:29,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 31880 states and 165330 transitions. [2021-10-06 21:03:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:29,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:29,818 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:29,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2021-10-06 21:03:30,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:30,033 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1943688993, now seen corresponding path program 94 times [2021-10-06 21:03:30,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:30,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494191092] [2021-10-06 21:03:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:03:30,035 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:30,036 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:30,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-10-06 21:03:31,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:03:31,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:03:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:31,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:31,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:31,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494191092] [2021-10-06 21:03:31,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494191092] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:31,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:31,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-06 21:03:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701273000] [2021-10-06 21:03:31,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:03:31,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:03:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:03:31,242 INFO L87 Difference]: Start difference. First operand 31880 states and 165330 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:31,958 INFO L93 Difference]: Finished difference Result 33150 states and 170591 transitions. [2021-10-06 21:03:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 21:03:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:03:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:32,447 INFO L225 Difference]: With dead ends: 33150 [2021-10-06 21:03:32,447 INFO L226 Difference]: Without dead ends: 33118 [2021-10-06 21:03:32,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:03:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33118 states. [2021-10-06 21:03:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33118 to 31408. [2021-10-06 21:03:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31408 states, 31407 states have (on average 5.189989492788232) internal successors, (163002), 31407 states have internal predecessors, (163002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31408 states to 31408 states and 163002 transitions. [2021-10-06 21:03:33,750 INFO L78 Accepts]: Start accepts. Automaton has 31408 states and 163002 transitions. Word has length 24 [2021-10-06 21:03:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:33,751 INFO L470 AbstractCegarLoop]: Abstraction has 31408 states and 163002 transitions. [2021-10-06 21:03:33,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 31408 states and 163002 transitions. [2021-10-06 21:03:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:33,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:33,866 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:33,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2021-10-06 21:03:34,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:34,082 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -104644121, now seen corresponding path program 95 times [2021-10-06 21:03:34,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:34,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275975861] [2021-10-06 21:03:34,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:03:34,083 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:34,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:34,085 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:34,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2021-10-06 21:03:35,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:03:35,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:03:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:35,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:35,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:35,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275975861] [2021-10-06 21:03:35,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275975861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:35,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:35,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:03:35,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835029139] [2021-10-06 21:03:35,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:03:35,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:03:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:03:35,354 INFO L87 Difference]: Start difference. First operand 31408 states and 163002 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:36,968 INFO L93 Difference]: Finished difference Result 42762 states and 214879 transitions. [2021-10-06 21:03:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:03:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:03:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:37,151 INFO L225 Difference]: With dead ends: 42762 [2021-10-06 21:03:37,152 INFO L226 Difference]: Without dead ends: 42754 [2021-10-06 21:03:37,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-10-06 21:03:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42754 states. [2021-10-06 21:03:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42754 to 35446. [2021-10-06 21:03:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35446 states, 35445 states have (on average 5.201184934405417) internal successors, (184356), 35445 states have internal predecessors, (184356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35446 states to 35446 states and 184356 transitions. [2021-10-06 21:03:39,143 INFO L78 Accepts]: Start accepts. Automaton has 35446 states and 184356 transitions. Word has length 24 [2021-10-06 21:03:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:39,144 INFO L470 AbstractCegarLoop]: Abstraction has 35446 states and 184356 transitions. [2021-10-06 21:03:39,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35446 states and 184356 transitions. [2021-10-06 21:03:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:39,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:39,276 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:39,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2021-10-06 21:03:39,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:39,484 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1506266373, now seen corresponding path program 96 times [2021-10-06 21:03:39,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:39,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500960911] [2021-10-06 21:03:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:03:39,486 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:39,488 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:39,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2021-10-06 21:03:40,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:03:40,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:40,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:03:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:40,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:41,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:41,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500960911] [2021-10-06 21:03:41,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500960911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:41,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:41,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-06 21:03:41,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906050226] [2021-10-06 21:03:41,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:03:41,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:03:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:03:41,182 INFO L87 Difference]: Start difference. First operand 35446 states and 184356 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:45,976 INFO L93 Difference]: Finished difference Result 50242 states and 252384 transitions. [2021-10-06 21:03:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-06 21:03:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:03:45,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:46,499 INFO L225 Difference]: With dead ends: 50242 [2021-10-06 21:03:46,499 INFO L226 Difference]: Without dead ends: 50242 [2021-10-06 21:03:46,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3459.7ms TimeCoverageRelationStatistics Valid=787, Invalid=2753, Unknown=0, NotChecked=0, Total=3540 [2021-10-06 21:03:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50242 states. [2021-10-06 21:03:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50242 to 35464. [2021-10-06 21:03:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35464 states, 35463 states have (on average 5.2005470490370245) internal successors, (184427), 35463 states have internal predecessors, (184427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35464 states to 35464 states and 184427 transitions. [2021-10-06 21:03:48,357 INFO L78 Accepts]: Start accepts. Automaton has 35464 states and 184427 transitions. Word has length 24 [2021-10-06 21:03:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:48,357 INFO L470 AbstractCegarLoop]: Abstraction has 35464 states and 184427 transitions. [2021-10-06 21:03:48,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 35464 states and 184427 transitions. [2021-10-06 21:03:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:48,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:48,461 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:48,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (130)] Ended with exit code 0 [2021-10-06 21:03:48,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:48,662 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1265142789, now seen corresponding path program 97 times [2021-10-06 21:03:48,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:48,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294080361] [2021-10-06 21:03:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:03:48,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:48,665 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:48,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2021-10-06 21:03:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:03:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:03:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:50,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:03:50,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:50,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294080361] [2021-10-06 21:03:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294080361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:50,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:50,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:03:50,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593753829] [2021-10-06 21:03:50,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:03:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:03:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:03:50,415 INFO L87 Difference]: Start difference. First operand 35464 states and 184427 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:03:52,023 INFO L93 Difference]: Finished difference Result 39000 states and 197710 transitions. [2021-10-06 21:03:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:03:52,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:03:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:03:52,494 INFO L225 Difference]: With dead ends: 39000 [2021-10-06 21:03:52,495 INFO L226 Difference]: Without dead ends: 38980 [2021-10-06 21:03:52,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 846.2ms TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-10-06 21:03:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38980 states. [2021-10-06 21:03:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38980 to 35828. [2021-10-06 21:03:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35828 states, 35827 states have (on average 5.196360286934435) internal successors, (186170), 35827 states have internal predecessors, (186170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35828 states to 35828 states and 186170 transitions. [2021-10-06 21:03:54,344 INFO L78 Accepts]: Start accepts. Automaton has 35828 states and 186170 transitions. Word has length 24 [2021-10-06 21:03:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:03:54,344 INFO L470 AbstractCegarLoop]: Abstraction has 35828 states and 186170 transitions. [2021-10-06 21:03:54,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:03:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 35828 states and 186170 transitions. [2021-10-06 21:03:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:03:54,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:03:54,516 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:03:54,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (131)] Ended with exit code 0 [2021-10-06 21:03:54,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:03:54,729 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:03:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:03:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1921255971, now seen corresponding path program 98 times [2021-10-06 21:03:54,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:03:54,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20267466] [2021-10-06 21:03:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:03:54,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:03:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:03:54,736 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:03:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2021-10-06 21:03:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:03:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:03:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:03:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:03:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:56,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:03:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:03:56,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:03:56,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20267466] [2021-10-06 21:03:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20267466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:03:56,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:03:56,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-10-06 21:03:56,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409917110] [2021-10-06 21:03:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:03:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:03:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:03:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:03:56,675 INFO L87 Difference]: Start difference. First operand 35828 states and 186170 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:08,182 INFO L93 Difference]: Finished difference Result 41028 states and 205661 transitions. [2021-10-06 21:04:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-06 21:04:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 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 24 [2021-10-06 21:04:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:08,612 INFO L225 Difference]: With dead ends: 41028 [2021-10-06 21:04:08,612 INFO L226 Difference]: Without dead ends: 41024 [2021-10-06 21:04:08,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 8534.4ms TimeCoverageRelationStatistics Valid=1222, Invalid=5258, Unknown=0, NotChecked=0, Total=6480 [2021-10-06 21:04:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41024 states. [2021-10-06 21:04:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41024 to 35936. [2021-10-06 21:04:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35936 states, 35935 states have (on average 5.196994573535551) internal successors, (186754), 35935 states have internal predecessors, (186754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35936 states to 35936 states and 186754 transitions. [2021-10-06 21:04:10,169 INFO L78 Accepts]: Start accepts. Automaton has 35936 states and 186754 transitions. Word has length 24 [2021-10-06 21:04:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:10,170 INFO L470 AbstractCegarLoop]: Abstraction has 35936 states and 186754 transitions. [2021-10-06 21:04:10,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35936 states and 186754 transitions. [2021-10-06 21:04:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:04:10,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:10,274 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:10,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2021-10-06 21:04:10,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:10,475 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash -661526341, now seen corresponding path program 99 times [2021-10-06 21:04:10,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:10,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552573584] [2021-10-06 21:04:10,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:04:10,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:10,478 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:10,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2021-10-06 21:04:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:04:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:04:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:04:11,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:04:11,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:04:12,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:12,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552573584] [2021-10-06 21:04:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552573584] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:12,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:12,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:04:12,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473961216] [2021-10-06 21:04:12,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:04:12,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:04:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:04:12,252 INFO L87 Difference]: Start difference. First operand 35936 states and 186754 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:13,274 INFO L93 Difference]: Finished difference Result 42570 states and 216179 transitions. [2021-10-06 21:04:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:04:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-10-06 21:04:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:13,475 INFO L225 Difference]: With dead ends: 42570 [2021-10-06 21:04:13,475 INFO L226 Difference]: Without dead ends: 42562 [2021-10-06 21:04:13,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 716.9ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:04:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42562 states. [2021-10-06 21:04:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42562 to 36508. [2021-10-06 21:04:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36508 states, 36507 states have (on average 5.207604021146629) internal successors, (190114), 36507 states have internal predecessors, (190114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36508 states to 36508 states and 190114 transitions. [2021-10-06 21:04:15,389 INFO L78 Accepts]: Start accepts. Automaton has 36508 states and 190114 transitions. Word has length 24 [2021-10-06 21:04:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:15,390 INFO L470 AbstractCegarLoop]: Abstraction has 36508 states and 190114 transitions. [2021-10-06 21:04:15,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 36508 states and 190114 transitions. [2021-10-06 21:04:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:04:15,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:15,513 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:15,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (133)] Ended with exit code 0 [2021-10-06 21:04:15,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:15,714 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1537649402, now seen corresponding path program 100 times [2021-10-06 21:04:15,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:15,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345207823] [2021-10-06 21:04:15,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:04:15,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:15,717 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:15,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2021-10-06 21:04:16,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:04:16,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:04:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:04:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:18,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:18,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345207823] [2021-10-06 21:04:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345207823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:18,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-06 21:04:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583043567] [2021-10-06 21:04:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:04:18,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:04:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:04:18,028 INFO L87 Difference]: Start difference. First operand 36508 states and 190114 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:04:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:22,307 INFO L93 Difference]: Finished difference Result 38990 states and 200943 transitions. [2021-10-06 21:04:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:04:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 25 [2021-10-06 21:04:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:22,509 INFO L225 Difference]: With dead ends: 38990 [2021-10-06 21:04:22,510 INFO L226 Difference]: Without dead ends: 38954 [2021-10-06 21:04:22,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:04:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38954 states. [2021-10-06 21:04:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38954 to 37904. [2021-10-06 21:04:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37904 states, 37903 states have (on average 5.205867609424057) internal successors, (197318), 37903 states have internal predecessors, (197318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37904 states to 37904 states and 197318 transitions. [2021-10-06 21:04:24,033 INFO L78 Accepts]: Start accepts. Automaton has 37904 states and 197318 transitions. Word has length 25 [2021-10-06 21:04:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:24,033 INFO L470 AbstractCegarLoop]: Abstraction has 37904 states and 197318 transitions. [2021-10-06 21:04:24,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:04:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37904 states and 197318 transitions. [2021-10-06 21:04:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:04:24,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:24,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:24,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2021-10-06 21:04:24,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:24,706 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:24,707 INFO L82 PathProgramCache]: Analyzing trace with hash 32572974, now seen corresponding path program 101 times [2021-10-06 21:04:24,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:24,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149554187] [2021-10-06 21:04:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:04:24,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:24,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:24,708 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2021-10-06 21:04:25,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:04:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:04:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:04:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:26,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:27,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:27,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149554187] [2021-10-06 21:04:27,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149554187] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:27,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:27,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:04:27,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12893992] [2021-10-06 21:04:27,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:04:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:04:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:04:27,345 INFO L87 Difference]: Start difference. First operand 37904 states and 197318 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:28,663 INFO L93 Difference]: Finished difference Result 39522 states and 204318 transitions. [2021-10-06 21:04:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:04:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:04:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:28,874 INFO L225 Difference]: With dead ends: 39522 [2021-10-06 21:04:28,875 INFO L226 Difference]: Without dead ends: 39508 [2021-10-06 21:04:28,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:04:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39508 states. [2021-10-06 21:04:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39508 to 38760. [2021-10-06 21:04:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38760 states, 38759 states have (on average 5.204417038623287) internal successors, (201718), 38759 states have internal predecessors, (201718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38760 states to 38760 states and 201718 transitions. [2021-10-06 21:04:30,474 INFO L78 Accepts]: Start accepts. Automaton has 38760 states and 201718 transitions. Word has length 25 [2021-10-06 21:04:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:30,474 INFO L470 AbstractCegarLoop]: Abstraction has 38760 states and 201718 transitions. [2021-10-06 21:04:30,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 38760 states and 201718 transitions. [2021-10-06 21:04:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:04:30,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:30,587 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:30,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2021-10-06 21:04:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:30,788 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2070497496, now seen corresponding path program 102 times [2021-10-06 21:04:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:30,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716328701] [2021-10-06 21:04:30,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:04:30,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:30,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:30,792 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:30,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2021-10-06 21:04:32,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:04:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:04:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:04:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:32,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:34,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:34,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716328701] [2021-10-06 21:04:34,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716328701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:34,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:04:34,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201400855] [2021-10-06 21:04:34,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:04:34,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:04:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:04:34,306 INFO L87 Difference]: Start difference. First operand 38760 states and 201718 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:35,165 INFO L93 Difference]: Finished difference Result 40500 states and 209256 transitions. [2021-10-06 21:04:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:04:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:04:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:35,614 INFO L225 Difference]: With dead ends: 40500 [2021-10-06 21:04:35,615 INFO L226 Difference]: Without dead ends: 40486 [2021-10-06 21:04:35,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1433.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:04:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40486 states. [2021-10-06 21:04:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40486 to 39708. [2021-10-06 21:04:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39708 states, 39707 states have (on average 5.204573500894049) internal successors, (206658), 39707 states have internal predecessors, (206658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39708 states to 39708 states and 206658 transitions. [2021-10-06 21:04:37,374 INFO L78 Accepts]: Start accepts. Automaton has 39708 states and 206658 transitions. Word has length 25 [2021-10-06 21:04:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:37,374 INFO L470 AbstractCegarLoop]: Abstraction has 39708 states and 206658 transitions. [2021-10-06 21:04:37,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39708 states and 206658 transitions. [2021-10-06 21:04:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:04:37,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:37,497 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:37,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (136)] Forceful destruction successful, exit code 0 [2021-10-06 21:04:37,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:37,697 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash -629526068, now seen corresponding path program 103 times [2021-10-06 21:04:37,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:37,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016586185] [2021-10-06 21:04:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:04:37,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:37,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:37,701 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:37,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2021-10-06 21:04:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:04:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:04:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:41,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:41,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016586185] [2021-10-06 21:04:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016586185] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:41,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:04:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134506491] [2021-10-06 21:04:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:04:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:04:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=149, Unknown=1, NotChecked=0, Total=182 [2021-10-06 21:04:41,920 INFO L87 Difference]: Start difference. First operand 39708 states and 206658 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:04:47,055 INFO L93 Difference]: Finished difference Result 41414 states and 214197 transitions. [2021-10-06 21:04:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:04:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:04:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:04:47,334 INFO L225 Difference]: With dead ends: 41414 [2021-10-06 21:04:47,334 INFO L226 Difference]: Without dead ends: 41386 [2021-10-06 21:04:47,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2782.4ms TimeCoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2021-10-06 21:04:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41386 states. [2021-10-06 21:04:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41386 to 40492. [2021-10-06 21:04:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40492 states, 40491 states have (on average 5.213430144970487) internal successors, (211097), 40491 states have internal predecessors, (211097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:04:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40492 states to 40492 states and 211097 transitions. [2021-10-06 21:04:48,920 INFO L78 Accepts]: Start accepts. Automaton has 40492 states and 211097 transitions. Word has length 25 [2021-10-06 21:04:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:04:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 40492 states and 211097 transitions. [2021-10-06 21:04:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:04:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40492 states and 211097 transitions. [2021-10-06 21:04:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:04:49,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:04:49,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:04:49,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2021-10-06 21:04:49,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:04:49,663 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:04:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:04:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1477258052, now seen corresponding path program 104 times [2021-10-06 21:04:49,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:04:49,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161691057] [2021-10-06 21:04:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:04:49,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:04:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:04:49,666 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:04:49,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2021-10-06 21:04:50,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:04:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:04:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:04:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:04:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:51,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:04:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:04:54,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:04:54,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161691057] [2021-10-06 21:04:54,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161691057] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:04:54,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:04:54,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-06 21:04:54,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857519784] [2021-10-06 21:04:54,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:04:54,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:04:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:04:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=175, Unknown=1, NotChecked=0, Total=210 [2021-10-06 21:04:54,066 INFO L87 Difference]: Start difference. First operand 40492 states and 211097 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:05:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:05:01,696 INFO L93 Difference]: Finished difference Result 41986 states and 217433 transitions. [2021-10-06 21:05:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:05:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 25 [2021-10-06 21:05:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:05:01,911 INFO L225 Difference]: With dead ends: 41986 [2021-10-06 21:05:01,911 INFO L226 Difference]: Without dead ends: 41972 [2021-10-06 21:05:01,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2804.3ms TimeCoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2021-10-06 21:05:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41972 states. [2021-10-06 21:05:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41972 to 41176. [2021-10-06 21:05:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41176 states, 41175 states have (on average 5.216029143897996) internal successors, (214770), 41175 states have internal predecessors, (214770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:05:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41176 states to 41176 states and 214770 transitions. [2021-10-06 21:05:03,653 INFO L78 Accepts]: Start accepts. Automaton has 41176 states and 214770 transitions. Word has length 25 [2021-10-06 21:05:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:05:03,653 INFO L470 AbstractCegarLoop]: Abstraction has 41176 states and 214770 transitions. [2021-10-06 21:05:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:05:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 41176 states and 214770 transitions. [2021-10-06 21:05:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:05:03,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:05:03,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:05:03,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2021-10-06 21:05:03,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:05:03,974 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:05:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:05:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash 537965662, now seen corresponding path program 105 times [2021-10-06 21:05:03,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:05:03,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711081775] [2021-10-06 21:05:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:05:03,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:05:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:05:03,978 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:05:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2021-10-06 21:05:05,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:05:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:05:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:05:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:05:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:06,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:05:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:06,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:05:06,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711081775] [2021-10-06 21:05:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711081775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:05:06,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:05:06,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:05:06,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171380997] [2021-10-06 21:05:06,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:05:06,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:05:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:05:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:05:06,689 INFO L87 Difference]: Start difference. First operand 41176 states and 214770 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:05:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:05:07,665 INFO L93 Difference]: Finished difference Result 42112 states and 218272 transitions. [2021-10-06 21:05:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:05:07,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:05:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:05:08,157 INFO L225 Difference]: With dead ends: 42112 [2021-10-06 21:05:08,157 INFO L226 Difference]: Without dead ends: 42098 [2021-10-06 21:05:08,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 528.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:05:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42098 states. [2021-10-06 21:05:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42098 to 41458. [2021-10-06 21:05:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41458 states, 41457 states have (on average 5.215452155245194) internal successors, (216217), 41457 states have internal predecessors, (216217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:05:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41458 states to 41458 states and 216217 transitions. [2021-10-06 21:05:09,949 INFO L78 Accepts]: Start accepts. Automaton has 41458 states and 216217 transitions. Word has length 25 [2021-10-06 21:05:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:05:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 41458 states and 216217 transitions. [2021-10-06 21:05:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:05:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 41458 states and 216217 transitions. [2021-10-06 21:05:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:05:10,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:05:10,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:05:10,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (139)] Forceful destruction successful, exit code 0 [2021-10-06 21:05:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:05:10,268 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:05:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:05:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1486573120, now seen corresponding path program 106 times [2021-10-06 21:05:10,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:05:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221612882] [2021-10-06 21:05:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:05:10,271 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:05:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:05:10,272 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:05:10,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-10-06 21:05:11,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:05:11,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:05:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:05:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:05:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:12,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:05:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:13,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:05:13,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221612882] [2021-10-06 21:05:13,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221612882] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:05:13,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:05:13,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:05:13,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281480154] [2021-10-06 21:05:13,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:05:13,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:05:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:05:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:05:13,030 INFO L87 Difference]: Start difference. First operand 41458 states and 216217 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:05:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:05:17,066 INFO L93 Difference]: Finished difference Result 42738 states and 221163 transitions. [2021-10-06 21:05:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:05:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:05:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:05:17,264 INFO L225 Difference]: With dead ends: 42738 [2021-10-06 21:05:17,265 INFO L226 Difference]: Without dead ends: 42698 [2021-10-06 21:05:17,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:05:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42698 states. [2021-10-06 21:05:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42698 to 41788. [2021-10-06 21:05:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41788 states, 41787 states have (on average 5.215665159020748) internal successors, (217947), 41787 states have internal predecessors, (217947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:05:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41788 states to 41788 states and 217947 transitions. [2021-10-06 21:05:19,342 INFO L78 Accepts]: Start accepts. Automaton has 41788 states and 217947 transitions. Word has length 25 [2021-10-06 21:05:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:05:19,343 INFO L470 AbstractCegarLoop]: Abstraction has 41788 states and 217947 transitions. [2021-10-06 21:05:19,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:05:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 41788 states and 217947 transitions. [2021-10-06 21:05:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:05:19,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:05:19,490 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:05:19,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2021-10-06 21:05:19,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:05:19,691 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:05:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:05:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash 592301764, now seen corresponding path program 107 times [2021-10-06 21:05:19,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:05:19,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270833681] [2021-10-06 21:05:19,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:05:19,693 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:05:19,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:05:19,694 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:05:19,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2021-10-06 21:05:20,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:05:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:05:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:05:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:05:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:21,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:05:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:05:22,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:05:22,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270833681] [2021-10-06 21:05:22,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270833681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:05:22,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:05:22,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-06 21:05:22,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610524918] [2021-10-06 21:05:22,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:05:22,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:05:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:05:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:05:22,050 INFO L87 Difference]: Start difference. First operand 41788 states and 217947 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:05:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:05:25,518 INFO L93 Difference]: Finished difference Result 43396 states and 224254 transitions. [2021-10-06 21:05:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:05:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 25 [2021-10-06 21:05:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:05:25,718 INFO L225 Difference]: With dead ends: 43396 [2021-10-06 21:05:25,718 INFO L226 Difference]: Without dead ends: 43344 [2021-10-06 21:05:25,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:05:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43344 states. [2021-10-06 21:05:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43344 to 42122. [2021-10-06 21:05:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42122 states, 42121 states have (on average 5.218537071769426) internal successors, (219810), 42121 states have internal predecessors, (219810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:05:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42122 states to 42122 states and 219810 transitions. [2021-10-06 21:05:27,781 INFO L78 Accepts]: Start accepts. Automaton has 42122 states and 219810 transitions. Word has length 25 [2021-10-06 21:05:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:05:27,781 INFO L470 AbstractCegarLoop]: Abstraction has 42122 states and 219810 transitions. [2021-10-06 21:05:27,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-10-06 21:05:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 42122 states and 219810 transitions. [2021-10-06 21:05:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:05:28,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:05:28,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:05:28,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2021-10-06 21:05:28,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:05:28,219 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-06 21:05:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:05:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash -52029278, now seen corresponding path program 108 times [2021-10-06 21:05:28,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:05:28,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744592815] [2021-10-06 21:05:28,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:05:28,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:05:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:05:28,223 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:05:28,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2021-10-06 21:05:29,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:05:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:05:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:05:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:05:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:30,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:05:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:05:33,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:05:33,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744592815] [2021-10-06 21:05:33,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744592815] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:05:33,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:05:33,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-06 21:05:33,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579700493] [2021-10-06 21:05:33,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:05:33,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:05:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:05:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=149, Unknown=1, NotChecked=0, Total=182 [2021-10-06 21:05:33,165 INFO L87 Difference]: Start difference. First operand 42122 states and 219810 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-10-06 21:05:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:05:35,228 INFO L93 Difference]: Finished difference Result 44212 states and 229215 transitions. [2021-10-06 21:05:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:05:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 25 [2021-10-06 21:05:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:05:35,436 INFO L225 Difference]: With dead ends: 44212 [2021-10-06 21:05:35,436 INFO L226 Difference]: Without dead ends: 44148 [2021-10-06 21:05:35,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3344.2ms TimeCoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2021-10-06 21:05:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44148 states.