/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more/nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 21:36:18,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 21:36:18,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 21:36:18,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-06 21:36:19,001 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 21:36:19,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 21:36:19,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 21:36:19,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 21:36:19,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 21:36:19,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 21:36:19,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 21:36:19,072 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 21:36:19,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 21:36:19,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 21:36:19,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 21:36:19,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 21:36:19,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 21:36:19,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 21:36:19,074 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-06 21:36:19,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-06 21:36:19,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-06 21:36:19,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 21:36:19,075 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-06 21:36:19,075 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-06 21:36:19,076 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-06 21:36:19,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 21:36:19,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 21:36:19,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 21:36:19,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 21:36:19,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 21:36:19,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:36:19,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 21:36:19,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 21:36:19,078 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-06 21:36:19,079 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-06 21:36:19,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 21:36:19,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-06 21:36:19,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 21:36:19,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 21:36:19,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 21:36:19,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 21:36:19,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 21:36:19,508 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 21:36:19,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more/nonblocking-counter-alt2.wvr.c [2021-10-06 21:36:19,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca4968256/f8fd770dac514415980699d48e37683b/FLAGf7983b2ca [2021-10-06 21:36:20,336 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 21:36:20,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/nonblocking-counter-alt2.wvr.c [2021-10-06 21:36:20,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca4968256/f8fd770dac514415980699d48e37683b/FLAGf7983b2ca [2021-10-06 21:36:20,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca4968256/f8fd770dac514415980699d48e37683b [2021-10-06 21:36:20,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 21:36:20,679 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-06 21:36:20,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 21:36:20,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 21:36:20,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 21:36:20,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:20,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9294ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20, skipping insertion in model container [2021-10-06 21:36:20,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:20,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 21:36:20,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 21:36:20,894 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/nonblocking-counter-alt2.wvr.c[1991,2004] [2021-10-06 21:36:20,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:36:20,916 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 21:36:20,940 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/nonblocking-counter-alt2.wvr.c[1991,2004] [2021-10-06 21:36:20,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:36:20,962 INFO L208 MainTranslator]: Completed translation [2021-10-06 21:36:20,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20 WrapperNode [2021-10-06 21:36:20,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 21:36:20,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 21:36:20,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 21:36:20,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 21:36:20,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:20,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 21:36:21,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 21:36:21,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 21:36:21,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 21:36:21,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 21:36:21,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 21:36:21,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 21:36:21,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 21:36:21,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (1/1) ... [2021-10-06 21:36:21,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:36:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 21:36:21,097 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 21:36:21,122 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 21:36:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 21:36:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 21:36:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 21:36:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 21:36:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-06 21:36:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 21:36:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-06 21:36:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-06 21:36:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-06 21:36:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 21:36:21,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 21:36:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 21:36:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-06 21:36:21,180 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 21:36:21,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 21:36:21,761 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-06 21:36:21,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:36:21 BoogieIcfgContainer [2021-10-06 21:36:21,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 21:36:21,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 21:36:21,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 21:36:21,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 21:36:21,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 09:36:20" (1/3) ... [2021-10-06 21:36:21,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201d4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:36:21, skipping insertion in model container [2021-10-06 21:36:21,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:36:20" (2/3) ... [2021-10-06 21:36:21,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201d4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:36:21, skipping insertion in model container [2021-10-06 21:36:21,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:36:21" (3/3) ... [2021-10-06 21:36:21,786 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.c [2021-10-06 21:36:21,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 21:36:21,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-06 21:36:21,794 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 21:36:21,852 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,853 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,853 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,854 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,861 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,863 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,867 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,867 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,868 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,869 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,877 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,886 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,887 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:36:21,898 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-06 21:36:21,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 21:36:21,997 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 21:36:21,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-10-06 21:36:22,020 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 21:36:22,033 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 83 transitions, 182 flow [2021-10-06 21:36:22,037 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 83 transitions, 182 flow [2021-10-06 21:36:22,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 182 flow [2021-10-06 21:36:22,114 INFO L129 PetriNetUnfolder]: 6/81 cut-off events. [2021-10-06 21:36:22,115 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-06 21:36:22,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2021-10-06 21:36:22,126 INFO L116 LiptonReduction]: Number of co-enabled transitions 462 [2021-10-06 21:36:29,643 INFO L131 LiptonReduction]: Checked pairs total: 574 [2021-10-06 21:36:29,644 INFO L133 LiptonReduction]: Total number of compositions: 78 [2021-10-06 21:36:29,658 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 70 flow [2021-10-06 21:36:29,674 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-06 21:36:29,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:29,683 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-06 21:36:29,683 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 332, now seen corresponding path program 1 times [2021-10-06 21:36:29,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:29,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037811874] [2021-10-06 21:36:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:29,702 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:29,705 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 21:36:29,723 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 21:36:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:29,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-06 21:36:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:29,778 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 21:36:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:29,779 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 21:36:29,780 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:29,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037811874] [2021-10-06 21:36:29,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037811874] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:29,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-06 21:36:29,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235623738] [2021-10-06 21:36:29,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-06 21:36:29,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-06 21:36:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 21:36:29,809 INFO L87 Difference]: Start difference. First operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 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 21:36:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:29,831 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2021-10-06 21:36:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-06 21:36:29,832 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 21:36:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:29,845 INFO L225 Difference]: With dead ends: 64 [2021-10-06 21:36:29,845 INFO L226 Difference]: Without dead ends: 64 [2021-10-06 21:36:29,846 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 21:36:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-06 21:36:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-06 21:36:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 151 transitions. [2021-10-06 21:36:29,888 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 151 transitions. Word has length 1 [2021-10-06 21:36:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 151 transitions. [2021-10-06 21:36:29,889 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 21:36:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 151 transitions. [2021-10-06 21:36:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:36:29,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:29,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:36:29,922 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 21:36:30,118 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 21:36:30,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash 325255, now seen corresponding path program 1 times [2021-10-06 21:36:30,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:30,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196974316] [2021-10-06 21:36:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:30,122 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:30,123 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 21:36:30,124 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 21:36:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:36:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:30,257 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-06 21:36:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-06 21:36:30,324 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 21:36:30,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:30,344 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 21:36:30,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196974316] [2021-10-06 21:36:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196974316] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:30,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:30,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:36:30,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013965563] [2021-10-06 21:36:30,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:36:30,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:36:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:30,349 INFO L87 Difference]: Start difference. First operand 64 states and 151 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:30,402 INFO L93 Difference]: Finished difference Result 58 states and 139 transitions. [2021-10-06 21:36:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:36:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 21:36:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:30,406 INFO L225 Difference]: With dead ends: 58 [2021-10-06 21:36:30,406 INFO L226 Difference]: Without dead ends: 58 [2021-10-06 21:36:30,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-06 21:36:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-06 21:36:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 57 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2021-10-06 21:36:30,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 3 [2021-10-06 21:36:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:30,423 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2021-10-06 21:36:30,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2021-10-06 21:36:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:36:30,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:30,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:36:30,449 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 21:36:30,642 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 21:36:30,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash 325257, now seen corresponding path program 1 times [2021-10-06 21:36:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:30,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600870543] [2021-10-06 21:36:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:30,647 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:30,648 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 21:36:30,651 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 21:36:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:36:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:30,796 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-06 21:36:30,797 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 3 case distinctions, treesize of input 15 treesize of output 38 [2021-10-06 21:36:30,880 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 21:36:30,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:30,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:30,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600870543] [2021-10-06 21:36:30,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600870543] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:30,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:30,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:36:30,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755053985] [2021-10-06 21:36:30,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:36:30,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:36:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:36:30,947 INFO L87 Difference]: Start difference. First operand 58 states and 139 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 21:36:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:30,973 INFO L93 Difference]: Finished difference Result 52 states and 127 transitions. [2021-10-06 21:36:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:36:30,974 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 21:36:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:30,975 INFO L225 Difference]: With dead ends: 52 [2021-10-06 21:36:30,976 INFO L226 Difference]: Without dead ends: 52 [2021-10-06 21:36:30,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:36:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-06 21:36:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-06 21:36:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-10-06 21:36:30,986 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 3 [2021-10-06 21:36:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:30,987 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-10-06 21:36:30,987 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 21:36:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-10-06 21:36:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:36:30,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:30,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:36:31,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-06 21:36:31,201 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 21:36:31,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash 312578109, now seen corresponding path program 1 times [2021-10-06 21:36:31,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:31,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314496145] [2021-10-06 21:36:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:31,205 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:31,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:31,206 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 21:36:31,208 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 21:36:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:31,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:36:31,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:31,399 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-06 21:36:31,399 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 3 case distinctions, treesize of input 15 treesize of output 38 [2021-10-06 21:36:31,495 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 21:36:31,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:31,581 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 21:36:31,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:31,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314496145] [2021-10-06 21:36:31,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314496145] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:31,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:31,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:36:31,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835332330] [2021-10-06 21:36:31,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:36:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:36:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:36:31,585 INFO L87 Difference]: Start difference. First operand 52 states and 127 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 21:36:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:31,604 INFO L93 Difference]: Finished difference Result 43 states and 100 transitions. [2021-10-06 21:36:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:36:31,606 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 21:36:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:31,607 INFO L225 Difference]: With dead ends: 43 [2021-10-06 21:36:31,607 INFO L226 Difference]: Without dead ends: 43 [2021-10-06 21:36:31,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:36:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-06 21:36:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-06 21:36:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 100 transitions. [2021-10-06 21:36:31,614 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 100 transitions. Word has length 5 [2021-10-06 21:36:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:31,615 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 100 transitions. [2021-10-06 21:36:31,616 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 21:36:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 100 transitions. [2021-10-06 21:36:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:36:31,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:31,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:36:31,630 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 21:36:31,817 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 21:36:31,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash 312578107, now seen corresponding path program 1 times [2021-10-06 21:36:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:31,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231902850] [2021-10-06 21:36:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:31,821 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:31,823 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 21:36:31,825 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 21:36:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:36:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:31,896 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-06 21:36:31,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-06 21:36:31,929 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 21:36:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:31,951 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 21:36:31,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:31,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231902850] [2021-10-06 21:36:31,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231902850] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:31,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:31,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:36:31,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439374964] [2021-10-06 21:36:31,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:36:31,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:36:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:31,954 INFO L87 Difference]: Start difference. First operand 43 states and 100 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 21:36:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:31,970 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-06 21:36:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:36:31,970 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 21:36:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:31,971 INFO L225 Difference]: With dead ends: 34 [2021-10-06 21:36:31,971 INFO L226 Difference]: Without dead ends: 34 [2021-10-06 21:36:31,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-06 21:36:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-06 21:36:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-06 21:36:31,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 5 [2021-10-06 21:36:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:31,977 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-06 21:36:31,977 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 21:36:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-06 21:36:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-06 21:36:31,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:31,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:31,994 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 21:36:32,191 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 21:36:32,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash -592426683, now seen corresponding path program 1 times [2021-10-06 21:36:32,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:32,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588798938] [2021-10-06 21:36:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:32,195 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:32,196 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 21:36:32,197 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 21:36:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:36:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:32,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:32,372 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 21:36:32,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:32,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588798938] [2021-10-06 21:36:32,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588798938] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:36:32,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:36:32,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:36:32,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442876471] [2021-10-06 21:36:32,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:36:32,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:36:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:32,375 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:32,393 INFO L93 Difference]: Finished difference Result 57 states and 124 transitions. [2021-10-06 21:36:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:36:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-06 21:36:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:32,395 INFO L225 Difference]: With dead ends: 57 [2021-10-06 21:36:32,395 INFO L226 Difference]: Without dead ends: 42 [2021-10-06 21:36:32,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:36:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-06 21:36:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-06 21:36:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-06 21:36:32,401 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-06 21:36:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:32,402 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-06 21:36:32,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-06 21:36:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-06 21:36:32,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:32,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:32,421 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 21:36:32,616 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 21:36:32,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1249740460, now seen corresponding path program 1 times [2021-10-06 21:36:32,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:32,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088293056] [2021-10-06 21:36:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:32,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:32,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:32,620 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 21:36:32,628 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 21:36:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:36:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:32,819 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 21:36:32,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:32,931 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 21:36:32,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088293056] [2021-10-06 21:36:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088293056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:32,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:32,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-06 21:36:32,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98669975] [2021-10-06 21:36:32,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:36:32,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:36:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:36:32,934 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:33,183 INFO L93 Difference]: Finished difference Result 86 states and 189 transitions. [2021-10-06 21:36:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:36:33,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-06 21:36:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:33,185 INFO L225 Difference]: With dead ends: 86 [2021-10-06 21:36:33,185 INFO L226 Difference]: Without dead ends: 86 [2021-10-06 21:36:33,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:36:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-06 21:36:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2021-10-06 21:36:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-06 21:36:33,193 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-10-06 21:36:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:33,194 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-06 21:36:33,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-06 21:36:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-06 21:36:33,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:33,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:33,210 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 21:36:33,409 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 21:36:33,410 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:33,411 INFO L82 PathProgramCache]: Analyzing trace with hash -597120314, now seen corresponding path program 1 times [2021-10-06 21:36:33,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:33,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834427212] [2021-10-06 21:36:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:36:33,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:33,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:33,415 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 21:36:33,416 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 21:36:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:36:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:33,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:34,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834427212] [2021-10-06 21:36:34,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834427212] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:34,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:34,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-06 21:36:34,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144563243] [2021-10-06 21:36:34,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:36:34,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:36:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:36:34,658 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 21:36:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:36,136 INFO L93 Difference]: Finished difference Result 211 states and 470 transitions. [2021-10-06 21:36:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:36:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-06 21:36:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:36,139 INFO L225 Difference]: With dead ends: 211 [2021-10-06 21:36:36,139 INFO L226 Difference]: Without dead ends: 182 [2021-10-06 21:36:36,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1171.7ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-10-06 21:36:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-06 21:36:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 92. [2021-10-06 21:36:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.4835164835164836) internal successors, (226), 91 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 226 transitions. [2021-10-06 21:36:36,152 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 226 transitions. Word has length 15 [2021-10-06 21:36:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:36,153 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 226 transitions. [2021-10-06 21:36:36,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 21:36:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 226 transitions. [2021-10-06 21:36:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-06 21:36:36,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:36,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:36,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-06 21:36:36,367 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 21:36:36,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -926737924, now seen corresponding path program 2 times [2021-10-06 21:36:36,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:36,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062445559] [2021-10-06 21:36:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:36:36,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:36,371 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 21:36:36,372 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 21:36:36,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:36:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:36,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:36:36,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:36,587 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 21:36:36,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:36,822 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 21:36:36,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:36,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062445559] [2021-10-06 21:36:36,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062445559] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:36,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:36,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-06 21:36:36,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567939091] [2021-10-06 21:36:36,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:36:36,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:36,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:36:36,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:36:36,825 INFO L87 Difference]: Start difference. First operand 92 states and 226 transitions. Second operand has 8 states, 8 states have (on average 3.0) 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 21:36:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:36,911 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2021-10-06 21:36:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:36:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) 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 15 [2021-10-06 21:36:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:36,913 INFO L225 Difference]: With dead ends: 108 [2021-10-06 21:36:36,913 INFO L226 Difference]: Without dead ends: 108 [2021-10-06 21:36:36,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:36:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-06 21:36:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2021-10-06 21:36:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 79 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 189 transitions. [2021-10-06 21:36:36,921 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 189 transitions. Word has length 15 [2021-10-06 21:36:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:36,921 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 189 transitions. [2021-10-06 21:36:36,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) 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 21:36:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 189 transitions. [2021-10-06 21:36:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:36,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:36,923 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:36,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-06 21:36:37,136 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 21:36:37,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1245085109, now seen corresponding path program 3 times [2021-10-06 21:36:37,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:37,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850452450] [2021-10-06 21:36:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:36:37,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:37,140 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 21:36:37,141 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 21:36:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:36:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:37,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:37,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:37,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850452450] [2021-10-06 21:36:37,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850452450] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:37,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:36:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922240511] [2021-10-06 21:36:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:36:37,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:36:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:36:37,810 INFO L87 Difference]: Start difference. First operand 80 states and 189 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:38,847 INFO L93 Difference]: Finished difference Result 170 states and 413 transitions. [2021-10-06 21:36:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 21:36:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2021-10-06 21:36:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:38,849 INFO L225 Difference]: With dead ends: 170 [2021-10-06 21:36:38,849 INFO L226 Difference]: Without dead ends: 168 [2021-10-06 21:36:38,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-10-06 21:36:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-06 21:36:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 96. [2021-10-06 21:36:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.5789473684210527) internal successors, (245), 95 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2021-10-06 21:36:38,859 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 16 [2021-10-06 21:36:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:38,859 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2021-10-06 21:36:38,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2021-10-06 21:36:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:38,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:38,862 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:38,876 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 21:36:39,076 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 21:36:39,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:39,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1275169323, now seen corresponding path program 4 times [2021-10-06 21:36:39,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:39,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31629638] [2021-10-06 21:36:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:36:39,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:39,081 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 21:36:39,082 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 21:36:39,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:36:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:39,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:39,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31629638] [2021-10-06 21:36:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31629638] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:39,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:39,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:36:39,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933534835] [2021-10-06 21:36:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:36:39,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:36:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:36:39,877 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:41,525 INFO L93 Difference]: Finished difference Result 262 states and 619 transitions. [2021-10-06 21:36:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-06 21:36:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 16 [2021-10-06 21:36:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:41,530 INFO L225 Difference]: With dead ends: 262 [2021-10-06 21:36:41,530 INFO L226 Difference]: Without dead ends: 262 [2021-10-06 21:36:41,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:36:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-06 21:36:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 100. [2021-10-06 21:36:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.6363636363636362) internal successors, (261), 99 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2021-10-06 21:36:41,551 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 16 [2021-10-06 21:36:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:41,552 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2021-10-06 21:36:41,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2021-10-06 21:36:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:41,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:41,558 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:41,571 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 21:36:41,759 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 21:36:41,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2017019111, now seen corresponding path program 5 times [2021-10-06 21:36:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:41,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787366834] [2021-10-06 21:36:41,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:36:41,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:41,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:41,763 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 21:36:41,766 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 21:36:41,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:36:41,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:36:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:42,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:42,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:42,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787366834] [2021-10-06 21:36:42,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787366834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:42,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:42,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:36:42,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669902585] [2021-10-06 21:36:42,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:36:42,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:36:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:36:42,529 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:45,771 INFO L93 Difference]: Finished difference Result 280 states and 690 transitions. [2021-10-06 21:36:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:36:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 16 [2021-10-06 21:36:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:45,775 INFO L225 Difference]: With dead ends: 280 [2021-10-06 21:36:45,776 INFO L226 Difference]: Without dead ends: 280 [2021-10-06 21:36:45,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 3004.4ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-10-06 21:36:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-06 21:36:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 112. [2021-10-06 21:36:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.7477477477477477) internal successors, (305), 111 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 305 transitions. [2021-10-06 21:36:45,785 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 305 transitions. Word has length 16 [2021-10-06 21:36:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:45,786 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 305 transitions. [2021-10-06 21:36:45,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 305 transitions. [2021-10-06 21:36:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:45,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:45,787 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:45,799 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 21:36:45,999 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 21:36:46,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 875156475, now seen corresponding path program 6 times [2021-10-06 21:36:46,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:46,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593098707] [2021-10-06 21:36:46,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:36:46,003 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:46,004 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 21:36:46,037 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 21:36:46,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:36:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:46,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:46,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:46,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593098707] [2021-10-06 21:36:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593098707] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:46,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:46,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:36:46,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165371828] [2021-10-06 21:36:46,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:36:46,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:36:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:36:46,750 INFO L87 Difference]: Start difference. First operand 112 states and 305 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:47,955 INFO L93 Difference]: Finished difference Result 200 states and 508 transitions. [2021-10-06 21:36:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:36:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2021-10-06 21:36:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:47,958 INFO L225 Difference]: With dead ends: 200 [2021-10-06 21:36:47,958 INFO L226 Difference]: Without dead ends: 198 [2021-10-06 21:36:47,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 981.8ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-10-06 21:36:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-06 21:36:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-10-06 21:36:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.874015748031496) internal successors, (365), 127 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 365 transitions. [2021-10-06 21:36:47,973 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 365 transitions. Word has length 16 [2021-10-06 21:36:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:47,974 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 365 transitions. [2021-10-06 21:36:47,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 365 transitions. [2021-10-06 21:36:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:47,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:47,975 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:47,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-06 21:36:48,188 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 21:36:48,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash 845072261, now seen corresponding path program 7 times [2021-10-06 21:36:48,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:48,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224277393] [2021-10-06 21:36:48,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:36:48,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:48,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:48,193 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 21:36:48,196 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 21:36:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:36:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:48,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:49,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224277393] [2021-10-06 21:36:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224277393] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:49,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:49,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:36:49,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392230510] [2021-10-06 21:36:49,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:36:49,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:36:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:36:49,031 INFO L87 Difference]: Start difference. First operand 128 states and 365 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:50,718 INFO L93 Difference]: Finished difference Result 262 states and 646 transitions. [2021-10-06 21:36:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 21:36:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 16 [2021-10-06 21:36:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:50,727 INFO L225 Difference]: With dead ends: 262 [2021-10-06 21:36:50,728 INFO L226 Difference]: Without dead ends: 262 [2021-10-06 21:36:50,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1524.5ms TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2021-10-06 21:36:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-06 21:36:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 124. [2021-10-06 21:36:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.83739837398374) internal successors, (349), 123 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 349 transitions. [2021-10-06 21:36:50,738 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 349 transitions. Word has length 16 [2021-10-06 21:36:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:50,739 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 349 transitions. [2021-10-06 21:36:50,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 349 transitions. [2021-10-06 21:36:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:50,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:50,740 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:50,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-06 21:36:50,942 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 21:36:50,943 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -157706601, now seen corresponding path program 8 times [2021-10-06 21:36:50,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:50,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795155964] [2021-10-06 21:36:50,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:36:50,945 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:50,946 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 21:36:50,948 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 21:36:51,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:36:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:51,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:51,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:51,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795155964] [2021-10-06 21:36:51,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795155964] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:51,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:51,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:36:51,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040942065] [2021-10-06 21:36:51,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:36:51,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:36:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:36:51,855 INFO L87 Difference]: Start difference. First operand 124 states and 349 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:53,840 INFO L93 Difference]: Finished difference Result 278 states and 718 transitions. [2021-10-06 21:36:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-06 21:36:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 16 [2021-10-06 21:36:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:53,847 INFO L225 Difference]: With dead ends: 278 [2021-10-06 21:36:53,848 INFO L226 Difference]: Without dead ends: 278 [2021-10-06 21:36:53,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1799.2ms TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 21:36:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-06 21:36:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 142. [2021-10-06 21:36:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.978723404255319) internal successors, (420), 141 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 420 transitions. [2021-10-06 21:36:53,860 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 420 transitions. Word has length 16 [2021-10-06 21:36:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:53,860 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 420 transitions. [2021-10-06 21:36:53,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 420 transitions. [2021-10-06 21:36:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:53,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:53,862 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:53,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-06 21:36:54,074 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 21:36:54,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash -987388219, now seen corresponding path program 9 times [2021-10-06 21:36:54,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:54,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705680818] [2021-10-06 21:36:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:36:54,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:54,078 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 21:36:54,079 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 21:36:54,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:36:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:54,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:54,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705680818] [2021-10-06 21:36:54,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705680818] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:54,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:54,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:36:54,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035437786] [2021-10-06 21:36:54,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:36:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:36:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:36:54,870 INFO L87 Difference]: Start difference. First operand 142 states and 420 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:56,027 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2021-10-06 21:36:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 21:36:56,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2021-10-06 21:36:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:56,030 INFO L225 Difference]: With dead ends: 242 [2021-10-06 21:36:56,030 INFO L226 Difference]: Without dead ends: 240 [2021-10-06 21:36:56,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-10-06 21:36:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-06 21:36:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 160. [2021-10-06 21:36:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.050314465408805) internal successors, (485), 159 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 485 transitions. [2021-10-06 21:36:56,039 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 485 transitions. Word has length 16 [2021-10-06 21:36:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:56,039 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 485 transitions. [2021-10-06 21:36:56,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 21:36:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 485 transitions. [2021-10-06 21:36:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 21:36:56,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:56,041 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:56,054 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 21:36:56,248 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 21:36:56,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1017472433, now seen corresponding path program 10 times [2021-10-06 21:36:56,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:56,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726762227] [2021-10-06 21:36:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:36:56,251 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:56,252 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 21:36:56,254 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 21:36:56,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:36:56,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:56,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:36:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:36:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:57,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:36:57,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726762227] [2021-10-06 21:36:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726762227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:36:57,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:36:57,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:36:57,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418433788] [2021-10-06 21:36:57,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:36:57,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:36:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:36:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:36:57,020 INFO L87 Difference]: Start difference. First operand 160 states and 485 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:36:58,661 INFO L93 Difference]: Finished difference Result 298 states and 777 transitions. [2021-10-06 21:36:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-06 21:36:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 16 [2021-10-06 21:36:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:36:58,665 INFO L225 Difference]: With dead ends: 298 [2021-10-06 21:36:58,665 INFO L226 Difference]: Without dead ends: 298 [2021-10-06 21:36:58,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1474.1ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-10-06 21:36:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-06 21:36:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 160. [2021-10-06 21:36:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0251572327044025) internal successors, (481), 159 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 481 transitions. [2021-10-06 21:36:58,675 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 481 transitions. Word has length 16 [2021-10-06 21:36:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 481 transitions. [2021-10-06 21:36:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 21:36:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 481 transitions. [2021-10-06 21:36:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:36:58,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:36:58,676 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:36:58,694 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 21:36:58,889 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 21:36:58,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:36:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:36:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1175406885, now seen corresponding path program 11 times [2021-10-06 21:36:58,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:36:58,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566457120] [2021-10-06 21:36:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:36:58,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:36:58,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:36:58,894 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 21:36:58,899 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 21:36:59,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:36:59,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:36:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-06 21:36:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:36:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:36:59,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:01,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:01,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566457120] [2021-10-06 21:37:01,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566457120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:01,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:01,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-06 21:37:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746501772] [2021-10-06 21:37:01,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:37:01,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:37:01,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:37:01,077 INFO L87 Difference]: Start difference. First operand 160 states and 481 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:37:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:13,948 INFO L93 Difference]: Finished difference Result 440 states and 1170 transitions. [2021-10-06 21:37:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-06 21:37:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-06 21:37:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:13,953 INFO L225 Difference]: With dead ends: 440 [2021-10-06 21:37:13,953 INFO L226 Difference]: Without dead ends: 412 [2021-10-06 21:37:13,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 9307.9ms TimeCoverageRelationStatistics Valid=872, Invalid=2098, Unknown=0, NotChecked=0, Total=2970 [2021-10-06 21:37:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-06 21:37:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 208. [2021-10-06 21:37:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9565217391304346) internal successors, (612), 207 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 21:37:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 612 transitions. [2021-10-06 21:37:13,966 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 612 transitions. Word has length 17 [2021-10-06 21:37:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:13,966 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 612 transitions. [2021-10-06 21:37:13,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:37:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 612 transitions. [2021-10-06 21:37:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:13,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:13,967 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:13,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-06 21:37:14,180 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 21:37:14,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1768675460, now seen corresponding path program 12 times [2021-10-06 21:37:14,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:14,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818084897] [2021-10-06 21:37:14,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:37:14,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:14,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:14,184 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 21:37:14,188 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 21:37:14,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:37:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:37:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:37:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:37:14,615 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 21:37:14,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:15,091 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 21:37:15,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:15,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818084897] [2021-10-06 21:37:15,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818084897] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:15,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:15,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-06 21:37:15,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337245565] [2021-10-06 21:37:15,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:37:15,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:37:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:37:15,094 INFO L87 Difference]: Start difference. First operand 208 states and 612 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 21:37:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:18,482 INFO L93 Difference]: Finished difference Result 542 states and 1406 transitions. [2021-10-06 21:37:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 21:37:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 17 [2021-10-06 21:37:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:18,489 INFO L225 Difference]: With dead ends: 542 [2021-10-06 21:37:18,489 INFO L226 Difference]: Without dead ends: 542 [2021-10-06 21:37:18,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3121.9ms TimeCoverageRelationStatistics Valid=560, Invalid=1602, Unknown=0, NotChecked=0, Total=2162 [2021-10-06 21:37:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-06 21:37:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 224. [2021-10-06 21:37:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.031390134529148) internal successors, (676), 223 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 21:37:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 676 transitions. [2021-10-06 21:37:18,504 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 676 transitions. Word has length 17 [2021-10-06 21:37:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 676 transitions. [2021-10-06 21:37:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 21:37:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 676 transitions. [2021-10-06 21:37:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:18,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:18,506 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:18,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-06 21:37:18,719 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 21:37:18,720 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash -981936676, now seen corresponding path program 13 times [2021-10-06 21:37:18,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:18,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278074544] [2021-10-06 21:37:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:37:18,723 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:18,725 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 21:37:18,733 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 21:37:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:37:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:37:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:37:19,188 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 21:37:19,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:19,689 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 21:37:19,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:19,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278074544] [2021-10-06 21:37:19,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278074544] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:19,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-06 21:37:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798577357] [2021-10-06 21:37:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:37:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:37:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:37:19,692 INFO L87 Difference]: Start difference. First operand 224 states and 676 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 21:37:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:23,232 INFO L93 Difference]: Finished difference Result 524 states and 1419 transitions. [2021-10-06 21:37:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:37:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 17 [2021-10-06 21:37:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:23,236 INFO L225 Difference]: With dead ends: 524 [2021-10-06 21:37:23,237 INFO L226 Difference]: Without dead ends: 524 [2021-10-06 21:37:23,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3360.8ms TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2021-10-06 21:37:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-06 21:37:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 230. [2021-10-06 21:37:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.034934497816594) internal successors, (695), 229 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:37:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 695 transitions. [2021-10-06 21:37:23,254 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 695 transitions. Word has length 17 [2021-10-06 21:37:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:23,254 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 695 transitions. [2021-10-06 21:37:23,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 21:37:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 695 transitions. [2021-10-06 21:37:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:23,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:23,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:23,273 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 21:37:23,471 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 21:37:23,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1367575653, now seen corresponding path program 14 times [2021-10-06 21:37:23,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:23,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211534826] [2021-10-06 21:37:23,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:37:23,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:23,475 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 21:37:23,477 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 21:37:23,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:37:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:37:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 21:37:23,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:37:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:37:24,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:24,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:24,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211534826] [2021-10-06 21:37:24,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211534826] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:24,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:24,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-06 21:37:24,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090497452] [2021-10-06 21:37:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:37:24,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:37:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:37:24,971 INFO L87 Difference]: Start difference. First operand 230 states and 695 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:37:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:29,367 INFO L93 Difference]: Finished difference Result 386 states and 1120 transitions. [2021-10-06 21:37:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:37:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 17 [2021-10-06 21:37:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:29,372 INFO L225 Difference]: With dead ends: 386 [2021-10-06 21:37:29,372 INFO L226 Difference]: Without dead ends: 354 [2021-10-06 21:37:29,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3709.5ms TimeCoverageRelationStatistics Valid=472, Invalid=1088, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:37:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-06 21:37:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 248. [2021-10-06 21:37:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.1012145748987856) internal successors, (766), 247 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:37:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 766 transitions. [2021-10-06 21:37:29,385 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 766 transitions. Word has length 17 [2021-10-06 21:37:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 766 transitions. [2021-10-06 21:37:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:37:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 766 transitions. [2021-10-06 21:37:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:29,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:29,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:29,402 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 21:37:29,600 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 21:37:29,601 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1337491439, now seen corresponding path program 15 times [2021-10-06 21:37:29,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:29,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836619518] [2021-10-06 21:37:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:37:29,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:29,605 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 21:37:29,607 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 21:37:29,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:37:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:37:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:37:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:37:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:30,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:31,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:31,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836619518] [2021-10-06 21:37:31,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836619518] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:31,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:31,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-06 21:37:31,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128823298] [2021-10-06 21:37:31,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:37:31,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:37:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:37:31,181 INFO L87 Difference]: Start difference. First operand 248 states and 766 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:37:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:35,375 INFO L93 Difference]: Finished difference Result 478 states and 1249 transitions. [2021-10-06 21:37:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:37:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 17 [2021-10-06 21:37:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:35,380 INFO L225 Difference]: With dead ends: 478 [2021-10-06 21:37:35,381 INFO L226 Difference]: Without dead ends: 478 [2021-10-06 21:37:35,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3378.2ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-10-06 21:37:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-06 21:37:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 248. [2021-10-06 21:37:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0931174089068825) internal successors, (764), 247 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:37:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 764 transitions. [2021-10-06 21:37:35,398 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 764 transitions. Word has length 17 [2021-10-06 21:37:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:35,398 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 764 transitions. [2021-10-06 21:37:35,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:37:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 764 transitions. [2021-10-06 21:37:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:35,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:35,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:35,418 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 21:37:35,614 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 21:37:35,614 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash 334712577, now seen corresponding path program 16 times [2021-10-06 21:37:35,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:35,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390799262] [2021-10-06 21:37:35,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:37:35,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:35,617 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 21:37:35,654 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 21:37:35,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:37:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:37:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 21:37:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:37:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:36,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:37:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:37:38,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:37:38,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390799262] [2021-10-06 21:37:38,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390799262] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:37:38,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:37:38,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-06 21:37:38,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786160714] [2021-10-06 21:37:38,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:37:38,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:37:38,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:37:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:37:38,588 INFO L87 Difference]: Start difference. First operand 248 states and 764 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:37:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:37:59,562 INFO L93 Difference]: Finished difference Result 655 states and 1638 transitions. [2021-10-06 21:37:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-06 21:37:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-06 21:37:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:37:59,568 INFO L225 Difference]: With dead ends: 655 [2021-10-06 21:37:59,568 INFO L226 Difference]: Without dead ends: 624 [2021-10-06 21:37:59,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 19242.6ms TimeCoverageRelationStatistics Valid=852, Invalid=2570, Unknown=0, NotChecked=0, Total=3422 [2021-10-06 21:37:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-06 21:37:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 254. [2021-10-06 21:37:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1185770750988144) internal successors, (789), 253 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:37:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 789 transitions. [2021-10-06 21:37:59,583 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 789 transitions. Word has length 17 [2021-10-06 21:37:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:37:59,584 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 789 transitions. [2021-10-06 21:37:59,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:37:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 789 transitions. [2021-10-06 21:37:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:37:59,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:37:59,585 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:37:59,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-06 21:37:59,798 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 21:37:59,798 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:37:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:37:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1408829114, now seen corresponding path program 17 times [2021-10-06 21:37:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:37:59,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085076212] [2021-10-06 21:37:59,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:37:59,801 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:37:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:37:59,802 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 21:37:59,802 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 21:38:00,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:38:00,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:38:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:00,186 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 21:38:00,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:00,367 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 21:38:00,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:00,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085076212] [2021-10-06 21:38:00,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085076212] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:00,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:00,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:38:00,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620704951] [2021-10-06 21:38:00,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:38:00,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:38:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:38:00,369 INFO L87 Difference]: Start difference. First operand 254 states and 789 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 21:38:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:01,244 INFO L93 Difference]: Finished difference Result 440 states and 1199 transitions. [2021-10-06 21:38:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 21:38:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-10-06 21:38:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:01,247 INFO L225 Difference]: With dead ends: 440 [2021-10-06 21:38:01,247 INFO L226 Difference]: Without dead ends: 440 [2021-10-06 21:38:01,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 644.3ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-10-06 21:38:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-06 21:38:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 258. [2021-10-06 21:38:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.124513618677043) internal successors, (803), 257 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 803 transitions. [2021-10-06 21:38:01,260 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 803 transitions. Word has length 17 [2021-10-06 21:38:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:01,261 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 803 transitions. [2021-10-06 21:38:01,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 21:38:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 803 transitions. [2021-10-06 21:38:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:01,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:01,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:01,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-06 21:38:01,475 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 21:38:01,476 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -26599901, now seen corresponding path program 18 times [2021-10-06 21:38:01,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:01,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495801287] [2021-10-06 21:38:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:38:01,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:01,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:01,478 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 21:38:01,483 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 21:38:01,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:38:01,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:38:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:02,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:02,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495801287] [2021-10-06 21:38:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495801287] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:02,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:02,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:38:02,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436036104] [2021-10-06 21:38:02,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:38:02,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:02,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:38:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:38:02,849 INFO L87 Difference]: Start difference. First operand 258 states and 803 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 21:38:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:04,959 INFO L93 Difference]: Finished difference Result 446 states and 1272 transitions. [2021-10-06 21:38:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-06 21:38:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17 [2021-10-06 21:38:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:04,962 INFO L225 Difference]: With dead ends: 446 [2021-10-06 21:38:04,962 INFO L226 Difference]: Without dead ends: 442 [2021-10-06 21:38:04,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1913.1ms TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-10-06 21:38:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-06 21:38:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 308. [2021-10-06 21:38:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.224755700325733) internal successors, (990), 307 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 990 transitions. [2021-10-06 21:38:04,976 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 990 transitions. Word has length 17 [2021-10-06 21:38:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:04,977 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 990 transitions. [2021-10-06 21:38:04,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 21:38:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 990 transitions. [2021-10-06 21:38:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:04,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:04,978 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:04,992 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 21:38:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:38:05,192 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash -56684115, now seen corresponding path program 19 times [2021-10-06 21:38:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:05,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169702647] [2021-10-06 21:38:05,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:38:05,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:05,195 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:38:05,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-06 21:38:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:38:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:38:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:05,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:06,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169702647] [2021-10-06 21:38:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169702647] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:06,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:06,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-06 21:38:06,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918480993] [2021-10-06 21:38:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:38:06,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:38:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:38:06,692 INFO L87 Difference]: Start difference. First operand 308 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:38:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:10,578 INFO L93 Difference]: Finished difference Result 610 states and 1655 transitions. [2021-10-06 21:38:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:38:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 17 [2021-10-06 21:38:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:10,584 INFO L225 Difference]: With dead ends: 610 [2021-10-06 21:38:10,584 INFO L226 Difference]: Without dead ends: 610 [2021-10-06 21:38:10,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3550.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:38:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-10-06 21:38:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 314. [2021-10-06 21:38:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.236421725239617) internal successors, (1013), 313 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1013 transitions. [2021-10-06 21:38:10,600 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1013 transitions. Word has length 17 [2021-10-06 21:38:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:10,600 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1013 transitions. [2021-10-06 21:38:10,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:38:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1013 transitions. [2021-10-06 21:38:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:10,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:10,602 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:10,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-06 21:38:10,814 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 21:38:10,815 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1059462977, now seen corresponding path program 20 times [2021-10-06 21:38:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:10,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117234453] [2021-10-06 21:38:10,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:38:10,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:10,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:10,818 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 21:38:10,820 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 21:38:11,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:38:11,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:38:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:11,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:12,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:12,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117234453] [2021-10-06 21:38:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117234453] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:12,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:12,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:38:12,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282885877] [2021-10-06 21:38:12,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:38:12,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:38:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:38:12,064 INFO L87 Difference]: Start difference. First operand 314 states and 1013 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:38:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:14,449 INFO L93 Difference]: Finished difference Result 582 states and 1573 transitions. [2021-10-06 21:38:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-06 21:38:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 17 [2021-10-06 21:38:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:14,454 INFO L225 Difference]: With dead ends: 582 [2021-10-06 21:38:14,454 INFO L226 Difference]: Without dead ends: 582 [2021-10-06 21:38:14,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2033.0ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 21:38:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-06 21:38:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 292. [2021-10-06 21:38:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1752577319587627) internal successors, (924), 291 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 924 transitions. [2021-10-06 21:38:14,467 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 924 transitions. Word has length 17 [2021-10-06 21:38:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:14,468 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 924 transitions. [2021-10-06 21:38:14,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:38:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 924 transitions. [2021-10-06 21:38:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:14,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:14,469 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:14,482 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 21:38:14,681 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 21:38:14,682 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1626790563, now seen corresponding path program 21 times [2021-10-06 21:38:14,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:14,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084425478] [2021-10-06 21:38:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:38:14,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:14,685 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 21:38:14,687 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 21:38:15,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:38:15,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:15,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:38:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:15,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:16,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:16,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084425478] [2021-10-06 21:38:16,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084425478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:16,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:16,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-06 21:38:16,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039576023] [2021-10-06 21:38:16,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:38:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:38:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:38:16,272 INFO L87 Difference]: Start difference. First operand 292 states and 924 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:38:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:19,767 INFO L93 Difference]: Finished difference Result 500 states and 1344 transitions. [2021-10-06 21:38:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-06 21:38:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 17 [2021-10-06 21:38:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:19,770 INFO L225 Difference]: With dead ends: 500 [2021-10-06 21:38:19,770 INFO L226 Difference]: Without dead ends: 468 [2021-10-06 21:38:19,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3100.5ms TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:38:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-10-06 21:38:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 300. [2021-10-06 21:38:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.17056856187291) internal successors, (948), 299 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 948 transitions. [2021-10-06 21:38:19,783 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 948 transitions. Word has length 17 [2021-10-06 21:38:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:19,783 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 948 transitions. [2021-10-06 21:38:19,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:38:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 948 transitions. [2021-10-06 21:38:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:19,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:19,785 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:19,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-06 21:38:19,998 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 21:38:19,998 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1637692241, now seen corresponding path program 22 times [2021-10-06 21:38:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:20,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251245879] [2021-10-06 21:38:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:38:20,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:20,002 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 21:38:20,003 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 21:38:20,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:38:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 21:38:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:24,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:24,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251245879] [2021-10-06 21:38:24,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251245879] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:24,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:24,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-06 21:38:24,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570036678] [2021-10-06 21:38:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:38:24,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:38:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:38:24,394 INFO L87 Difference]: Start difference. First operand 300 states and 948 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:38:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:46,249 INFO L93 Difference]: Finished difference Result 715 states and 1847 transitions. [2021-10-06 21:38:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-06 21:38:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-06 21:38:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:46,256 INFO L225 Difference]: With dead ends: 715 [2021-10-06 21:38:46,256 INFO L226 Difference]: Without dead ends: 682 [2021-10-06 21:38:46,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 21012.1ms TimeCoverageRelationStatistics Valid=635, Invalid=1815, Unknown=0, NotChecked=0, Total=2450 [2021-10-06 21:38:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-10-06 21:38:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 320. [2021-10-06 21:38:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.2037617554858935) internal successors, (1022), 319 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1022 transitions. [2021-10-06 21:38:46,277 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1022 transitions. Word has length 17 [2021-10-06 21:38:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:46,278 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1022 transitions. [2021-10-06 21:38:46,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:38:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1022 transitions. [2021-10-06 21:38:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:46,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:46,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:46,295 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 21:38:46,492 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 21:38:46,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1676960421, now seen corresponding path program 23 times [2021-10-06 21:38:46,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:46,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541763867] [2021-10-06 21:38:46,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:38:46,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:46,497 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 21:38:46,514 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 21:38:46,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:38:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:38:46,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:47,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:47,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541763867] [2021-10-06 21:38:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541763867] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:47,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:38:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169898887] [2021-10-06 21:38:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:38:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:38:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:38:47,932 INFO L87 Difference]: Start difference. First operand 320 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 21:38:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:48,930 INFO L93 Difference]: Finished difference Result 416 states and 1246 transitions. [2021-10-06 21:38:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:38:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17 [2021-10-06 21:38:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:48,935 INFO L225 Difference]: With dead ends: 416 [2021-10-06 21:38:48,935 INFO L226 Difference]: Without dead ends: 414 [2021-10-06 21:38:48,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1032.2ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:38:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-10-06 21:38:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 324. [2021-10-06 21:38:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.2136222910216716) internal successors, (1038), 323 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1038 transitions. [2021-10-06 21:38:48,946 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1038 transitions. Word has length 17 [2021-10-06 21:38:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:48,946 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1038 transitions. [2021-10-06 21:38:48,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 21:38:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1038 transitions. [2021-10-06 21:38:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:48,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:48,948 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:48,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-06 21:38:49,161 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 21:38:49,161 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1646876207, now seen corresponding path program 24 times [2021-10-06 21:38:49,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:49,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600551834] [2021-10-06 21:38:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:38:49,164 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:49,165 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 21:38:49,169 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 21:38:49,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:38:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:38:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:38:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:49,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:50,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:50,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600551834] [2021-10-06 21:38:50,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600551834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:50,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:38:50,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854097708] [2021-10-06 21:38:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:38:50,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:38:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:38:50,627 INFO L87 Difference]: Start difference. First operand 324 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:38:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:38:52,558 INFO L93 Difference]: Finished difference Result 540 states and 1469 transitions. [2021-10-06 21:38:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 21:38:52,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 17 [2021-10-06 21:38:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:38:52,562 INFO L225 Difference]: With dead ends: 540 [2021-10-06 21:38:52,562 INFO L226 Difference]: Without dead ends: 540 [2021-10-06 21:38:52,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1805.0ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-10-06 21:38:52,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-06 21:38:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 310. [2021-10-06 21:38:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.220064724919094) internal successors, (995), 309 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:38:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 995 transitions. [2021-10-06 21:38:52,574 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 995 transitions. Word has length 17 [2021-10-06 21:38:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:38:52,574 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 995 transitions. [2021-10-06 21:38:52,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:38:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 995 transitions. [2021-10-06 21:38:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 21:38:52,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:38:52,575 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:38:52,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-06 21:38:52,788 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 21:38:52,790 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:38:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:38:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash -266618425, now seen corresponding path program 25 times [2021-10-06 21:38:52,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:38:52,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688307161] [2021-10-06 21:38:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:38:52,792 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:38:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:38:52,793 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 21:38:52,794 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 21:38:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:38:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 21:38:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:38:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:54,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:38:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:38:57,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:38:57,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688307161] [2021-10-06 21:38:57,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688307161] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:38:57,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:38:57,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-06 21:38:57,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583623038] [2021-10-06 21:38:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:38:57,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:38:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:38:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:38:57,248 INFO L87 Difference]: Start difference. First operand 310 states and 995 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:39:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:12,015 INFO L93 Difference]: Finished difference Result 656 states and 1700 transitions. [2021-10-06 21:39:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-06 21:39:12,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-06 21:39:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:12,019 INFO L225 Difference]: With dead ends: 656 [2021-10-06 21:39:12,019 INFO L226 Difference]: Without dead ends: 586 [2021-10-06 21:39:12,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 14489.8ms TimeCoverageRelationStatistics Valid=637, Invalid=1525, Unknown=0, NotChecked=0, Total=2162 [2021-10-06 21:39:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-10-06 21:39:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 316. [2021-10-06 21:39:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.149206349206349) internal successors, (992), 315 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 992 transitions. [2021-10-06 21:39:12,030 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 992 transitions. Word has length 17 [2021-10-06 21:39:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:12,030 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 992 transitions. [2021-10-06 21:39:12,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:39:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 992 transitions. [2021-10-06 21:39:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:12,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:12,032 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:12,048 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 21:39:12,245 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 21:39:12,246 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1111704885, now seen corresponding path program 26 times [2021-10-06 21:39:12,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:12,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415116596] [2021-10-06 21:39:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:39:12,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:12,249 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 21:39:12,250 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 21:39:12,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:39:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:39:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 21:39:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:39:12,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:39:13,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:13,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415116596] [2021-10-06 21:39:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415116596] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:13,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:13,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:39:13,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018046146] [2021-10-06 21:39:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:39:13,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:39:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:39:13,656 INFO L87 Difference]: Start difference. First operand 316 states and 992 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:14,694 INFO L93 Difference]: Finished difference Result 552 states and 1560 transitions. [2021-10-06 21:39:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 21:39:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:39:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:14,698 INFO L225 Difference]: With dead ends: 552 [2021-10-06 21:39:14,698 INFO L226 Difference]: Without dead ends: 552 [2021-10-06 21:39:14,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1058.7ms TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:39:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-10-06 21:39:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 304. [2021-10-06 21:39:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1485148514851486) internal successors, (954), 303 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-10-06 21:39:14,710 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-10-06 21:39:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:14,711 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-10-06 21:39:14,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-10-06 21:39:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:14,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:14,712 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:14,729 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 21:39:14,926 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 21:39:14,927 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 348524670, now seen corresponding path program 27 times [2021-10-06 21:39:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:14,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933096508] [2021-10-06 21:39:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:39:14,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:14,931 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 21:39:14,932 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 21:39:15,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-06 21:39:15,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:39:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 21:39:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:15,895 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 21:39:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:16,600 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 21:39:16,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:16,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933096508] [2021-10-06 21:39:16,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933096508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:16,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:16,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:39:16,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191459645] [2021-10-06 21:39:16,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:39:16,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:39:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:39:16,603 INFO L87 Difference]: Start difference. First operand 304 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:24,199 INFO L93 Difference]: Finished difference Result 688 states and 1904 transitions. [2021-10-06 21:39:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-06 21:39:24,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:39:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:24,204 INFO L225 Difference]: With dead ends: 688 [2021-10-06 21:39:24,204 INFO L226 Difference]: Without dead ends: 688 [2021-10-06 21:39:24,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 7005.3ms TimeCoverageRelationStatistics Valid=1089, Invalid=3881, Unknown=0, NotChecked=0, Total=4970 [2021-10-06 21:39:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-10-06 21:39:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 314. [2021-10-06 21:39:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.1725239616613417) internal successors, (993), 313 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 993 transitions. [2021-10-06 21:39:24,219 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 993 transitions. Word has length 18 [2021-10-06 21:39:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:24,219 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 993 transitions. [2021-10-06 21:39:24,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 993 transitions. [2021-10-06 21:39:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:24,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:24,220 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:24,233 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 21:39:24,429 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 21:39:24,429 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1651504334, now seen corresponding path program 28 times [2021-10-06 21:39:24,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:24,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399456561] [2021-10-06 21:39:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:39:24,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:24,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:24,433 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 21:39:24,435 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 21:39:24,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:39:24,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:39:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:39:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:25,398 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 21:39:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:26,580 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 21:39:26,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:26,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399456561] [2021-10-06 21:39:26,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399456561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:26,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:26,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:39:26,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089247309] [2021-10-06 21:39:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:39:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:39:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:39:26,582 INFO L87 Difference]: Start difference. First operand 314 states and 993 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:32,646 INFO L93 Difference]: Finished difference Result 576 states and 1639 transitions. [2021-10-06 21:39:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-06 21:39:32,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:39:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:32,651 INFO L225 Difference]: With dead ends: 576 [2021-10-06 21:39:32,651 INFO L226 Difference]: Without dead ends: 576 [2021-10-06 21:39:32,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 5793.7ms TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2021-10-06 21:39:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-10-06 21:39:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 328. [2021-10-06 21:39:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.1865443425076454) internal successors, (1042), 327 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1042 transitions. [2021-10-06 21:39:32,662 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1042 transitions. Word has length 18 [2021-10-06 21:39:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:32,662 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1042 transitions. [2021-10-06 21:39:32,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1042 transitions. [2021-10-06 21:39:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:32,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:32,664 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:32,678 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 21:39:32,877 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 21:39:32,878 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash 676431102, now seen corresponding path program 29 times [2021-10-06 21:39:32,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:32,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134292399] [2021-10-06 21:39:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:39:32,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:32,881 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 21:39:32,882 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 21:39:33,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:39:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:39:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:39:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:39:33,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:35,420 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 21:39:35,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:35,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134292399] [2021-10-06 21:39:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134292399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:35,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:35,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-06 21:39:35,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830156032] [2021-10-06 21:39:35,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:39:35,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:39:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:39:35,423 INFO L87 Difference]: Start difference. First operand 328 states and 1042 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 21:39:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:43,590 INFO L93 Difference]: Finished difference Result 762 states and 1977 transitions. [2021-10-06 21:39:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-06 21:39:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 18 [2021-10-06 21:39:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:43,595 INFO L225 Difference]: With dead ends: 762 [2021-10-06 21:39:43,595 INFO L226 Difference]: Without dead ends: 762 [2021-10-06 21:39:43,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 7717.0ms TimeCoverageRelationStatistics Valid=568, Invalid=1882, Unknown=0, NotChecked=0, Total=2450 [2021-10-06 21:39:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-10-06 21:39:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 356. [2021-10-06 21:39:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.23943661971831) internal successors, (1150), 355 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1150 transitions. [2021-10-06 21:39:43,609 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1150 transitions. Word has length 18 [2021-10-06 21:39:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:43,610 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1150 transitions. [2021-10-06 21:39:43,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 21:39:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1150 transitions. [2021-10-06 21:39:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:43,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:43,611 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:43,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-06 21:39:43,825 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 21:39:43,825 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash -372648178, now seen corresponding path program 30 times [2021-10-06 21:39:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:43,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258395505] [2021-10-06 21:39:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:39:43,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:43,828 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 21:39:43,831 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 21:39:44,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:39:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:39:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:39:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:44,800 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 21:39:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:45,913 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 21:39:45,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:45,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258395505] [2021-10-06 21:39:45,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258395505] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:45,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:45,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:39:45,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523294012] [2021-10-06 21:39:45,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:39:45,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:39:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:39:45,916 INFO L87 Difference]: Start difference. First operand 356 states and 1150 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:39:52,301 INFO L93 Difference]: Finished difference Result 582 states and 1725 transitions. [2021-10-06 21:39:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-06 21:39:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:39:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:39:52,305 INFO L225 Difference]: With dead ends: 582 [2021-10-06 21:39:52,305 INFO L226 Difference]: Without dead ends: 582 [2021-10-06 21:39:52,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 6264.9ms TimeCoverageRelationStatistics Valid=615, Invalid=1641, Unknown=0, NotChecked=0, Total=2256 [2021-10-06 21:39:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-06 21:39:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 378. [2021-10-06 21:39:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.259946949602122) internal successors, (1229), 377 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:39:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1229 transitions. [2021-10-06 21:39:52,319 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1229 transitions. Word has length 18 [2021-10-06 21:39:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:39:52,319 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1229 transitions. [2021-10-06 21:39:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:39:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1229 transitions. [2021-10-06 21:39:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:39:52,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:39:52,321 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:39:52,333 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 21:39:52,526 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 21:39:52,526 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:39:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:39:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -875714828, now seen corresponding path program 31 times [2021-10-06 21:39:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:39:52,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359146629] [2021-10-06 21:39:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:39:52,529 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:39:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:39:52,530 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 21:39:52,544 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 21:39:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:39:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:39:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:39:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:39:53,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:39:54,615 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 21:39:54,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:39:54,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359146629] [2021-10-06 21:39:54,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359146629] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:39:54,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:39:54,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-06 21:39:54,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542889422] [2021-10-06 21:39:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:39:54,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:39:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:39:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:39:54,617 INFO L87 Difference]: Start difference. First operand 378 states and 1229 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:00,036 INFO L93 Difference]: Finished difference Result 516 states and 1555 transitions. [2021-10-06 21:40:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 21:40:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 18 [2021-10-06 21:40:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:00,039 INFO L225 Difference]: With dead ends: 516 [2021-10-06 21:40:00,040 INFO L226 Difference]: Without dead ends: 514 [2021-10-06 21:40:00,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5120.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:40:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-06 21:40:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-10-06 21:40:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.2885085574572126) internal successors, (1345), 409 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1345 transitions. [2021-10-06 21:40:00,051 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1345 transitions. Word has length 18 [2021-10-06 21:40:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:00,052 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1345 transitions. [2021-10-06 21:40:00,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1345 transitions. [2021-10-06 21:40:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:00,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:00,053 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:00,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-06 21:40:00,267 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 21:40:00,268 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash -905799042, now seen corresponding path program 32 times [2021-10-06 21:40:00,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:00,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149951594] [2021-10-06 21:40:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:40:00,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:00,271 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 21:40:00,272 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 21:40:00,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:40:00,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:00,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:00,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:01,337 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 21:40:01,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:02,601 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 21:40:02,601 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:02,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149951594] [2021-10-06 21:40:02,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149951594] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:02,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:02,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:40:02,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771276822] [2021-10-06 21:40:02,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:40:02,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:40:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:40:02,604 INFO L87 Difference]: Start difference. First operand 410 states and 1345 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:40:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:09,393 INFO L93 Difference]: Finished difference Result 632 states and 1843 transitions. [2021-10-06 21:40:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:40:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:40:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:09,398 INFO L225 Difference]: With dead ends: 632 [2021-10-06 21:40:09,398 INFO L226 Difference]: Without dead ends: 632 [2021-10-06 21:40:09,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 6271.2ms TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2021-10-06 21:40:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-10-06 21:40:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 424. [2021-10-06 21:40:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.3049645390070923) internal successors, (1398), 423 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1398 transitions. [2021-10-06 21:40:09,413 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1398 transitions. Word has length 18 [2021-10-06 21:40:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:09,413 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1398 transitions. [2021-10-06 21:40:09,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:40:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1398 transitions. [2021-10-06 21:40:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:09,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:09,415 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:09,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-06 21:40:09,616 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 21:40:09,616 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1880872274, now seen corresponding path program 33 times [2021-10-06 21:40:09,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:09,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75360828] [2021-10-06 21:40:09,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:40:09,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:09,620 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 21:40:09,620 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 21:40:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:40:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:10,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:11,755 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 21:40:11,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:11,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75360828] [2021-10-06 21:40:11,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75360828] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:11,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-06 21:40:11,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034987832] [2021-10-06 21:40:11,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:40:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:40:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:40:11,757 INFO L87 Difference]: Start difference. First operand 424 states and 1398 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:18,723 INFO L93 Difference]: Finished difference Result 710 states and 2021 transitions. [2021-10-06 21:40:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:40:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 18 [2021-10-06 21:40:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:18,727 INFO L225 Difference]: With dead ends: 710 [2021-10-06 21:40:18,727 INFO L226 Difference]: Without dead ends: 702 [2021-10-06 21:40:18,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 6705.9ms TimeCoverageRelationStatistics Valid=509, Invalid=1383, Unknown=0, NotChecked=0, Total=1892 [2021-10-06 21:40:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-10-06 21:40:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 448. [2021-10-06 21:40:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.3333333333333335) internal successors, (1490), 447 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1490 transitions. [2021-10-06 21:40:18,742 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1490 transitions. Word has length 18 [2021-10-06 21:40:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:18,742 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1490 transitions. [2021-10-06 21:40:18,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1490 transitions. [2021-10-06 21:40:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:18,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:18,744 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:18,758 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 21:40:18,954 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 21:40:18,954 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1365015742, now seen corresponding path program 34 times [2021-10-06 21:40:18,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:18,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910959386] [2021-10-06 21:40:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:40:18,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:18,958 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 21:40:18,959 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 21:40:19,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:40:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:19,953 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 21:40:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:21,246 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 21:40:21,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:21,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910959386] [2021-10-06 21:40:21,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910959386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:21,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-06 21:40:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612389529] [2021-10-06 21:40:21,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:40:21,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:40:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:40:21,249 INFO L87 Difference]: Start difference. First operand 448 states and 1490 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:40:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:28,399 INFO L93 Difference]: Finished difference Result 680 states and 2072 transitions. [2021-10-06 21:40:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:40:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 18 [2021-10-06 21:40:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:28,405 INFO L225 Difference]: With dead ends: 680 [2021-10-06 21:40:28,405 INFO L226 Difference]: Without dead ends: 680 [2021-10-06 21:40:28,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 6813.9ms TimeCoverageRelationStatistics Valid=599, Invalid=1563, Unknown=0, NotChecked=0, Total=2162 [2021-10-06 21:40:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-06 21:40:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2021-10-06 21:40:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.37888198757764) internal successors, (1632), 483 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1632 transitions. [2021-10-06 21:40:28,418 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1632 transitions. Word has length 18 [2021-10-06 21:40:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1632 transitions. [2021-10-06 21:40:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 21:40:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1632 transitions. [2021-10-06 21:40:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:28,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:28,420 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:28,437 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 21:40:28,634 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 21:40:28,635 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1381848794, now seen corresponding path program 35 times [2021-10-06 21:40:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:28,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959357348] [2021-10-06 21:40:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:40:28,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:28,638 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 21:40:28,639 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 21:40:29,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:40:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:40:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:29,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:30,289 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:30,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959357348] [2021-10-06 21:40:30,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959357348] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:30,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:30,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-06 21:40:30,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086714797] [2021-10-06 21:40:30,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:40:30,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:40:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:40:30,291 INFO L87 Difference]: Start difference. First operand 484 states and 1632 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 21:40:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:34,131 INFO L93 Difference]: Finished difference Result 586 states and 1855 transitions. [2021-10-06 21:40:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 21:40:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 18 [2021-10-06 21:40:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:34,137 INFO L225 Difference]: With dead ends: 586 [2021-10-06 21:40:34,137 INFO L226 Difference]: Without dead ends: 582 [2021-10-06 21:40:34,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3591.8ms TimeCoverageRelationStatistics Valid=388, Invalid=1172, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:40:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-06 21:40:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 508. [2021-10-06 21:40:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.3767258382642997) internal successors, (1712), 507 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1712 transitions. [2021-10-06 21:40:34,150 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1712 transitions. Word has length 18 [2021-10-06 21:40:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:34,150 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1712 transitions. [2021-10-06 21:40:34,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 21:40:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1712 transitions. [2021-10-06 21:40:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:34,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:34,152 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:34,165 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 21:40:34,352 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 21:40:34,353 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash 220196670, now seen corresponding path program 36 times [2021-10-06 21:40:34,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:34,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028752899] [2021-10-06 21:40:34,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:40:34,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:34,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:34,356 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 21:40:34,359 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 21:40:34,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-06 21:40:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:34,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:36,538 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 21:40:36,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:36,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028752899] [2021-10-06 21:40:36,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028752899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:36,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:36,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-06 21:40:36,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115079380] [2021-10-06 21:40:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:40:36,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:40:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:40:36,541 INFO L87 Difference]: Start difference. First operand 508 states and 1712 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:41,828 INFO L93 Difference]: Finished difference Result 640 states and 2010 transitions. [2021-10-06 21:40:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 21:40:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 18 [2021-10-06 21:40:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:41,833 INFO L225 Difference]: With dead ends: 640 [2021-10-06 21:40:41,833 INFO L226 Difference]: Without dead ends: 636 [2021-10-06 21:40:41,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4959.7ms TimeCoverageRelationStatistics Valid=431, Invalid=1209, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 21:40:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-10-06 21:40:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 530. [2021-10-06 21:40:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.4120982986767485) internal successors, (1805), 529 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1805 transitions. [2021-10-06 21:40:41,854 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1805 transitions. Word has length 18 [2021-10-06 21:40:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:41,854 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1805 transitions. [2021-10-06 21:40:41,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1805 transitions. [2021-10-06 21:40:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:41,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:41,860 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:41,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-06 21:40:42,060 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 21:40:42,061 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash 217818086, now seen corresponding path program 37 times [2021-10-06 21:40:42,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:42,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302397403] [2021-10-06 21:40:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:40:42,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:42,064 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 21:40:42,065 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 21:40:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:40:42,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:42,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:43,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:44,159 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 21:40:44,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:44,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302397403] [2021-10-06 21:40:44,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302397403] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:44,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:44,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-06 21:40:44,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110607471] [2021-10-06 21:40:44,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:40:44,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:40:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:40:44,161 INFO L87 Difference]: Start difference. First operand 530 states and 1805 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:40:52,133 INFO L93 Difference]: Finished difference Result 818 states and 2419 transitions. [2021-10-06 21:40:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-06 21:40:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 18 [2021-10-06 21:40:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:40:52,138 INFO L225 Difference]: With dead ends: 818 [2021-10-06 21:40:52,138 INFO L226 Difference]: Without dead ends: 818 [2021-10-06 21:40:52,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 7504.5ms TimeCoverageRelationStatistics Valid=625, Invalid=1825, Unknown=0, NotChecked=0, Total=2450 [2021-10-06 21:40:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-10-06 21:40:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 562. [2021-10-06 21:40:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.449197860962567) internal successors, (1935), 561 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:40:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1935 transitions. [2021-10-06 21:40:52,159 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1935 transitions. Word has length 18 [2021-10-06 21:40:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:40:52,159 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1935 transitions. [2021-10-06 21:40:52,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:40:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1935 transitions. [2021-10-06 21:40:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 21:40:52,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:40:52,161 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:40:52,171 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 21:40:52,361 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 21:40:52,361 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:40:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:40:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash -784960776, now seen corresponding path program 38 times [2021-10-06 21:40:52,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:40:52,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232404856] [2021-10-06 21:40:52,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:40:52,364 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:40:52,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:40:52,365 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 21:40:52,366 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 21:40:52,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:40:52,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:40:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:40:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:40:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:40:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:40:54,383 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 21:40:54,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:40:54,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232404856] [2021-10-06 21:40:54,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232404856] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:40:54,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:40:54,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-06 21:40:54,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044771298] [2021-10-06 21:40:54,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:40:54,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:40:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:40:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:40:54,385 INFO L87 Difference]: Start difference. First operand 562 states and 1935 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:41:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:41:02,553 INFO L93 Difference]: Finished difference Result 890 states and 2634 transitions. [2021-10-06 21:41:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-06 21:41:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 18 [2021-10-06 21:41:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:41:02,559 INFO L225 Difference]: With dead ends: 890 [2021-10-06 21:41:02,559 INFO L226 Difference]: Without dead ends: 890 [2021-10-06 21:41:02,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 7902.3ms TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2021-10-06 21:41:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-10-06 21:41:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 582. [2021-10-06 21:41:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.4750430292598966) internal successors, (2019), 581 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:41:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2019 transitions. [2021-10-06 21:41:02,574 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2019 transitions. Word has length 18 [2021-10-06 21:41:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:41:02,574 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 2019 transitions. [2021-10-06 21:41:02,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 21:41:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2019 transitions. [2021-10-06 21:41:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:41:02,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:41:02,575 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:41:02,587 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 21:41:02,776 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 21:41:02,776 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:41:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:41:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash 974804582, now seen corresponding path program 39 times [2021-10-06 21:41:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:41:02,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573023728] [2021-10-06 21:41:02,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:41:02,778 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:41:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:41:02,779 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 21:41:02,785 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 21:41:03,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:41:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:41:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 21:41:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:41:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:41:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:41:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:41:09,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:41:09,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573023728] [2021-10-06 21:41:09,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573023728] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:41:09,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:41:09,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-06 21:41:09,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312819030] [2021-10-06 21:41:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 21:41:09,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:41:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 21:41:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:41:09,046 INFO L87 Difference]: Start difference. First operand 582 states and 2019 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:42:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:42:25,071 INFO L93 Difference]: Finished difference Result 1180 states and 3531 transitions. [2021-10-06 21:42:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-06 21:42:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:42:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:42:25,075 INFO L225 Difference]: With dead ends: 1180 [2021-10-06 21:42:25,075 INFO L226 Difference]: Without dead ends: 1148 [2021-10-06 21:42:25,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 36216.2ms TimeCoverageRelationStatistics Valid=1869, Invalid=4773, Unknown=0, NotChecked=0, Total=6642 [2021-10-06 21:42:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-06 21:42:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 636. [2021-10-06 21:42:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.415748031496063) internal successors, (2169), 635 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:42:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 2169 transitions. [2021-10-06 21:42:25,092 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 2169 transitions. Word has length 19 [2021-10-06 21:42:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:42:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 2169 transitions. [2021-10-06 21:42:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:42:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 2169 transitions. [2021-10-06 21:42:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:42:25,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:42:25,094 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:42:25,107 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 21:42:25,294 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 21:42:25,295 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:42:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:42:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash -216968467, now seen corresponding path program 40 times [2021-10-06 21:42:25,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:42:25,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325956305] [2021-10-06 21:42:25,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:42:25,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:42:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:42:25,298 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 21:42:25,300 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 21:42:25,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:42:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:42:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-06 21:42:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:42:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:42:26,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:42:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:42:27,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:42:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325956305] [2021-10-06 21:42:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325956305] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:42:27,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:42:27,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-06 21:42:27,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412571433] [2021-10-06 21:42:27,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:42:27,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:42:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:42:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:42:27,508 INFO L87 Difference]: Start difference. First operand 636 states and 2169 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 21:42:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:42:37,076 INFO L93 Difference]: Finished difference Result 1282 states and 3918 transitions. [2021-10-06 21:42:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-06 21:42:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 19 [2021-10-06 21:42:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:42:37,080 INFO L225 Difference]: With dead ends: 1282 [2021-10-06 21:42:37,080 INFO L226 Difference]: Without dead ends: 1282 [2021-10-06 21:42:37,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 9398.5ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-10-06 21:42:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-10-06 21:42:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 660. [2021-10-06 21:42:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.4279210925644916) internal successors, (2259), 659 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:42:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2259 transitions. [2021-10-06 21:42:37,101 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2259 transitions. Word has length 19 [2021-10-06 21:42:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:42:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2259 transitions. [2021-10-06 21:42:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 21:42:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2259 transitions. [2021-10-06 21:42:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:42:37,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:42:37,103 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:42:37,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-06 21:42:37,303 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 21:42:37,304 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:42:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:42:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1327386693, now seen corresponding path program 41 times [2021-10-06 21:42:37,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:42:37,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084888938] [2021-10-06 21:42:37,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:42:37,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:42:37,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:42:37,307 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 21:42:37,308 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 21:42:38,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:42:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:42:38,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:42:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:42:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:42:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:42:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:42:39,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:42:39,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084888938] [2021-10-06 21:42:39,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084888938] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:42:39,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:42:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-06 21:42:39,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681322671] [2021-10-06 21:42:39,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:42:39,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:42:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:42:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:42:39,476 INFO L87 Difference]: Start difference. First operand 660 states and 2259 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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 21:42:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:42:50,663 INFO L93 Difference]: Finished difference Result 1548 states and 4411 transitions. [2021-10-06 21:42:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-06 21:42:50,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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 19 [2021-10-06 21:42:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:42:50,667 INFO L225 Difference]: With dead ends: 1548 [2021-10-06 21:42:50,667 INFO L226 Difference]: Without dead ends: 1548 [2021-10-06 21:42:50,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 10820.8ms TimeCoverageRelationStatistics Valid=1251, Invalid=4299, Unknown=0, NotChecked=0, Total=5550 [2021-10-06 21:42:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-10-06 21:42:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 662. [2021-10-06 21:42:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.4251134644478065) internal successors, (2264), 661 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:42:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2264 transitions. [2021-10-06 21:42:50,686 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2264 transitions. Word has length 19 [2021-10-06 21:42:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:42:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2264 transitions. [2021-10-06 21:42:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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 21:42:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2264 transitions. [2021-10-06 21:42:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:42:50,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:42:50,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:42:50,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-06 21:42:50,888 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 21:42:50,889 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:42:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:42:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash 162481884, now seen corresponding path program 42 times [2021-10-06 21:42:50,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:42:50,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965617827] [2021-10-06 21:42:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:42:50,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:42:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:42:50,892 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 21:42:50,893 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 21:42:51,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-06 21:42:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:42:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-06 21:42:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:42:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:42:52,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:42:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:42:54,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:42:54,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965617827] [2021-10-06 21:42:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965617827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:42:54,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:42:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-06 21:42:54,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616238846] [2021-10-06 21:42:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:42:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:42:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:42:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:42:54,546 INFO L87 Difference]: Start difference. First operand 662 states and 2264 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:43:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:43:13,123 INFO L93 Difference]: Finished difference Result 972 states and 3113 transitions. [2021-10-06 21:43:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-06 21:43:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 19 [2021-10-06 21:43:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:43:13,126 INFO L225 Difference]: With dead ends: 972 [2021-10-06 21:43:13,126 INFO L226 Difference]: Without dead ends: 936 [2021-10-06 21:43:13,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 16577.6ms TimeCoverageRelationStatistics Valid=1086, Invalid=2696, Unknown=0, NotChecked=0, Total=3782 [2021-10-06 21:43:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-10-06 21:43:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 680. [2021-10-06 21:43:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.4388807069219443) internal successors, (2335), 679 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:43:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2335 transitions. [2021-10-06 21:43:13,144 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2335 transitions. Word has length 19 [2021-10-06 21:43:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:43:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2335 transitions. [2021-10-06 21:43:13,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:43:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2335 transitions. [2021-10-06 21:43:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:43:13,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:43:13,146 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:43:13,158 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 21:43:13,347 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 21:43:13,347 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:43:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:43:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash 132397670, now seen corresponding path program 43 times [2021-10-06 21:43:13,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:43:13,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819693434] [2021-10-06 21:43:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:43:13,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:43:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:43:13,350 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 21:43:13,351 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 21:43:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:43:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 21:43:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:43:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:43:14,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:43:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:43:18,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:43:18,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819693434] [2021-10-06 21:43:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819693434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:43:18,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:43:18,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-06 21:43:18,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084495215] [2021-10-06 21:43:18,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-06 21:43:18,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:43:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-06 21:43:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:43:18,287 INFO L87 Difference]: Start difference. First operand 680 states and 2335 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 21:43:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:43:57,190 INFO L93 Difference]: Finished difference Result 1208 states and 3625 transitions. [2021-10-06 21:43:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-06 21:43:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 19 [2021-10-06 21:43:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:43:57,194 INFO L225 Difference]: With dead ends: 1208 [2021-10-06 21:43:57,195 INFO L226 Difference]: Without dead ends: 1208 [2021-10-06 21:43:57,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 34323.5ms TimeCoverageRelationStatistics Valid=958, Invalid=2948, Unknown=0, NotChecked=0, Total=3906 [2021-10-06 21:43:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-10-06 21:43:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 676. [2021-10-06 21:43:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.4325925925925924) internal successors, (2317), 675 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:43:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2317 transitions. [2021-10-06 21:43:57,214 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2317 transitions. Word has length 19 [2021-10-06 21:43:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:43:57,214 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2317 transitions. [2021-10-06 21:43:57,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 21:43:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2317 transitions. [2021-10-06 21:43:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:43:57,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:43:57,217 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:43:57,229 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 21:43:57,417 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 21:43:57,418 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:43:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:43:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -513655683, now seen corresponding path program 44 times [2021-10-06 21:43:57,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:43:57,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056526174] [2021-10-06 21:43:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:43:57,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:43:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:43:57,421 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 21:43:57,423 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 21:43:58,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:43:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:43:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-06 21:43:58,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:43:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:43:58,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:43:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:43:59,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:43:59,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056526174] [2021-10-06 21:43:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056526174] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:43:59,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:43:59,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-06 21:43:59,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021298225] [2021-10-06 21:43:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:43:59,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:43:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:43:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:43:59,705 INFO L87 Difference]: Start difference. First operand 676 states and 2317 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:44:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:44:08,226 INFO L93 Difference]: Finished difference Result 928 states and 3101 transitions. [2021-10-06 21:44:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-06 21:44:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 19 [2021-10-06 21:44:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:44:08,235 INFO L225 Difference]: With dead ends: 928 [2021-10-06 21:44:08,235 INFO L226 Difference]: Without dead ends: 926 [2021-10-06 21:44:08,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 8192.0ms TimeCoverageRelationStatistics Valid=730, Invalid=2462, Unknown=0, NotChecked=0, Total=3192 [2021-10-06 21:44:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-06 21:44:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 690. [2021-10-06 21:44:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.4194484760522497) internal successors, (2356), 689 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:44:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2356 transitions. [2021-10-06 21:44:08,256 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2356 transitions. Word has length 19 [2021-10-06 21:44:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:44:08,256 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2356 transitions. [2021-10-06 21:44:08,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 21:44:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2356 transitions. [2021-10-06 21:44:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:44:08,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:44:08,258 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:44:08,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-06 21:44:08,459 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 21:44:08,459 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:44:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:44:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash -870381192, now seen corresponding path program 45 times [2021-10-06 21:44:08,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:44:08,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645171931] [2021-10-06 21:44:08,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:44:08,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:44:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:44:08,463 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 21:44:08,465 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 21:44:09,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-06 21:44:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:44:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 21:44:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:44:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:44:11,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:44:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:44:15,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:44:15,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645171931] [2021-10-06 21:44:15,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645171931] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:44:15,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:44:15,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-06 21:44:15,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608143414] [2021-10-06 21:44:15,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 21:44:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:44:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 21:44:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:44:15,590 INFO L87 Difference]: Start difference. First operand 690 states and 2356 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:45:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:45:21,414 INFO L93 Difference]: Finished difference Result 1160 states and 3410 transitions. [2021-10-06 21:45:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-06 21:45:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:45:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:45:21,420 INFO L225 Difference]: With dead ends: 1160 [2021-10-06 21:45:21,420 INFO L226 Difference]: Without dead ends: 1132 [2021-10-06 21:45:21,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 58818.6ms TimeCoverageRelationStatistics Valid=1232, Invalid=3880, Unknown=0, NotChecked=0, Total=5112 [2021-10-06 21:45:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-10-06 21:45:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 692. [2021-10-06 21:45:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.4196816208393632) internal successors, (2363), 691 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:45:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2363 transitions. [2021-10-06 21:45:21,443 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2363 transitions. Word has length 19 [2021-10-06 21:45:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:45:21,443 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2363 transitions. [2021-10-06 21:45:21,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:45:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2363 transitions. [2021-10-06 21:45:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:45:21,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:45:21,446 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:45:21,462 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 21:45:21,659 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 21:45:21,659 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:45:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:45:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1891754842, now seen corresponding path program 46 times [2021-10-06 21:45:21,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:45:21,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357737970] [2021-10-06 21:45:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:45:21,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:45:21,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:45:21,662 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 21:45:21,667 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 21:45:22,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:45:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:45:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 21:45:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:45:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:45:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:45:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:45:27,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:45:27,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357737970] [2021-10-06 21:45:27,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357737970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:45:27,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:45:27,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-06 21:45:27,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436402252] [2021-10-06 21:45:27,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 21:45:27,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:45:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 21:45:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:45:27,179 INFO L87 Difference]: Start difference. First operand 692 states and 2363 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:46:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:46:01,050 INFO L93 Difference]: Finished difference Result 1336 states and 3896 transitions. [2021-10-06 21:46:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-06 21:46:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:46:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:46:01,057 INFO L225 Difference]: With dead ends: 1336 [2021-10-06 21:46:01,057 INFO L226 Difference]: Without dead ends: 1304 [2021-10-06 21:46:01,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 29158.8ms TimeCoverageRelationStatistics Valid=1612, Invalid=4394, Unknown=0, NotChecked=0, Total=6006 [2021-10-06 21:46:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-10-06 21:46:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 700. [2021-10-06 21:46:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.432045779685265) internal successors, (2399), 699 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:46:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2399 transitions. [2021-10-06 21:46:01,082 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2399 transitions. Word has length 19 [2021-10-06 21:46:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:46:01,082 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2399 transitions. [2021-10-06 21:46:01,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:46:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2399 transitions. [2021-10-06 21:46:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:46:01,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:46:01,085 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:46:01,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-06 21:46:01,299 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 21:46:01,299 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:46:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:46:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1681044413, now seen corresponding path program 47 times [2021-10-06 21:46:01,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:46:01,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687673449] [2021-10-06 21:46:01,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:46:01,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:46:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:46:01,302 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 21:46:01,339 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 21:46:02,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:46:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:46:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 21:46:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:46:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:02,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:46:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:04,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:46:04,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687673449] [2021-10-06 21:46:04,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687673449] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:46:04,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:46:04,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-10-06 21:46:04,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681420850] [2021-10-06 21:46:04,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 21:46:04,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:46:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 21:46:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:46:04,840 INFO L87 Difference]: Start difference. First operand 700 states and 2399 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 21:46:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:46:20,283 INFO L93 Difference]: Finished difference Result 1492 states and 4256 transitions. [2021-10-06 21:46:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-06 21:46:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 19 [2021-10-06 21:46:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:46:20,285 INFO L225 Difference]: With dead ends: 1492 [2021-10-06 21:46:20,286 INFO L226 Difference]: Without dead ends: 1492 [2021-10-06 21:46:20,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 14484.3ms TimeCoverageRelationStatistics Valid=1256, Invalid=5064, Unknown=0, NotChecked=0, Total=6320 [2021-10-06 21:46:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-10-06 21:46:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 744. [2021-10-06 21:46:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.452220726783311) internal successors, (2565), 743 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:46:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2565 transitions. [2021-10-06 21:46:20,308 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2565 transitions. Word has length 19 [2021-10-06 21:46:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:46:20,308 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2565 transitions. [2021-10-06 21:46:20,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 21:46:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2565 transitions. [2021-10-06 21:46:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:46:20,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:46:20,311 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:46:20,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-06 21:46:20,527 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 21:46:20,528 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:46:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:46:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1608992707, now seen corresponding path program 48 times [2021-10-06 21:46:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:46:20,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389464032] [2021-10-06 21:46:20,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:46:20,529 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:46:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:46:20,531 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 21:46:20,569 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 21:46:21,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:46:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:46:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-06 21:46:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:46:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:22,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:46:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:23,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:46:23,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389464032] [2021-10-06 21:46:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389464032] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:46:23,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:46:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-06 21:46:23,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822427063] [2021-10-06 21:46:23,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-06 21:46:23,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:46:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-06 21:46:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:46:23,533 INFO L87 Difference]: Start difference. First operand 744 states and 2565 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 21:46:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:46:40,470 INFO L93 Difference]: Finished difference Result 1254 states and 3927 transitions. [2021-10-06 21:46:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-06 21:46:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 19 [2021-10-06 21:46:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:46:40,474 INFO L225 Difference]: With dead ends: 1254 [2021-10-06 21:46:40,474 INFO L226 Difference]: Without dead ends: 1254 [2021-10-06 21:46:40,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 16092.2ms TimeCoverageRelationStatistics Valid=1466, Invalid=5340, Unknown=0, NotChecked=0, Total=6806 [2021-10-06 21:46:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-10-06 21:46:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 762. [2021-10-06 21:46:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4533508541392903) internal successors, (2628), 761 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:46:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2628 transitions. [2021-10-06 21:46:40,490 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2628 transitions. Word has length 19 [2021-10-06 21:46:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:46:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2628 transitions. [2021-10-06 21:46:40,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 21:46:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2628 transitions. [2021-10-06 21:46:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:46:40,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:46:40,492 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:46:40,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-06 21:46:40,693 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 21:46:40,693 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:46:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:46:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash 485367302, now seen corresponding path program 49 times [2021-10-06 21:46:40,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:46:40,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156075459] [2021-10-06 21:46:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:46:40,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:46:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:46:40,696 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 21:46:40,698 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 21:46:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:46:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-06 21:46:41,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:46:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:42,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:46:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:46:45,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:46:45,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156075459] [2021-10-06 21:46:45,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156075459] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:46:45,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:46:45,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-06 21:46:45,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024095260] [2021-10-06 21:46:45,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 21:46:45,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:46:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 21:46:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:46:45,890 INFO L87 Difference]: Start difference. First operand 762 states and 2628 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:47:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:47:23,666 INFO L93 Difference]: Finished difference Result 1128 states and 3453 transitions. [2021-10-06 21:47:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-06 21:47:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 19 [2021-10-06 21:47:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:47:23,670 INFO L225 Difference]: With dead ends: 1128 [2021-10-06 21:47:23,670 INFO L226 Difference]: Without dead ends: 1128 [2021-10-06 21:47:23,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 36245.4ms TimeCoverageRelationStatistics Valid=677, Invalid=2515, Unknown=0, NotChecked=0, Total=3192 [2021-10-06 21:47:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-10-06 21:47:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 804. [2021-10-06 21:47:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4782067247820674) internal successors, (2793), 803 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:47:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2793 transitions. [2021-10-06 21:47:23,686 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2793 transitions. Word has length 19 [2021-10-06 21:47:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:47:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2793 transitions. [2021-10-06 21:47:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:47:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2793 transitions. [2021-10-06 21:47:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:47:23,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:47:23,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:47:23,704 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 21:47:23,888 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 21:47:23,889 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:47:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:47:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1112444776, now seen corresponding path program 50 times [2021-10-06 21:47:23,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:47:23,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764113250] [2021-10-06 21:47:23,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:47:23,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:47:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:47:23,892 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 21:47:23,893 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 21:47:24,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:47:24,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:47:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 21:47:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:47:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:47:26,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:47:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:47:30,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:47:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764113250] [2021-10-06 21:47:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764113250] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:47:30,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:47:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-06 21:47:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274391858] [2021-10-06 21:47:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 21:47:30,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:47:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 21:47:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:47:30,791 INFO L87 Difference]: Start difference. First operand 804 states and 2793 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:48:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:48:30,837 INFO L93 Difference]: Finished difference Result 1178 states and 3609 transitions. [2021-10-06 21:48:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-06 21:48:30,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:48:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:48:30,841 INFO L225 Difference]: With dead ends: 1178 [2021-10-06 21:48:30,841 INFO L226 Difference]: Without dead ends: 1152 [2021-10-06 21:48:30,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 46811.6ms TimeCoverageRelationStatistics Valid=1017, Invalid=3015, Unknown=0, NotChecked=0, Total=4032 [2021-10-06 21:48:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-10-06 21:48:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 812. [2021-10-06 21:48:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4833538840937113) internal successors, (2825), 811 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:48:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2825 transitions. [2021-10-06 21:48:30,857 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2825 transitions. Word has length 19 [2021-10-06 21:48:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:48:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 2825 transitions. [2021-10-06 21:48:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:48:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2825 transitions. [2021-10-06 21:48:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:48:30,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:48:30,860 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:48:30,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-06 21:48:31,060 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 21:48:31,061 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:48:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:48:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -887245215, now seen corresponding path program 51 times [2021-10-06 21:48:31,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:48:31,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012645439] [2021-10-06 21:48:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:48:31,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:48:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:48:31,064 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 21:48:31,065 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 21:48:32,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:48:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:48:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 21:48:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:48:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:48:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:48:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:48:33,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:48:33,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012645439] [2021-10-06 21:48:33,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012645439] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:48:33,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:48:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-06 21:48:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691747513] [2021-10-06 21:48:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-06 21:48:33,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:48:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-06 21:48:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:48:33,750 INFO L87 Difference]: Start difference. First operand 812 states and 2825 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 21:48:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:48:41,249 INFO L93 Difference]: Finished difference Result 1252 states and 4088 transitions. [2021-10-06 21:48:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-06 21:48:41,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 19 [2021-10-06 21:48:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:48:41,252 INFO L225 Difference]: With dead ends: 1252 [2021-10-06 21:48:41,252 INFO L226 Difference]: Without dead ends: 1252 [2021-10-06 21:48:41,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 7313.4ms TimeCoverageRelationStatistics Valid=1054, Invalid=2852, Unknown=0, NotChecked=0, Total=3906 [2021-10-06 21:48:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-10-06 21:48:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 918. [2021-10-06 21:48:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.5332606324972735) internal successors, (3240), 917 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:48:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3240 transitions. [2021-10-06 21:48:41,274 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3240 transitions. Word has length 19 [2021-10-06 21:48:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:48:41,274 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 3240 transitions. [2021-10-06 21:48:41,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 21:48:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3240 transitions. [2021-10-06 21:48:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 21:48:41,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:48:41,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:48:41,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-06 21:48:41,477 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 21:48:41,478 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-06 21:48:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:48:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2133443240, now seen corresponding path program 52 times [2021-10-06 21:48:41,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:48:41,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115745313] [2021-10-06 21:48:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:48:41,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:48:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:48:41,480 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 21:48:41,516 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 21:48:42,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:48:42,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:48:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 21:48:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:49:06,760 WARN L207 SmtUtils]: Spent 22.59 s on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-10-06 21:49:15,245 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 56 [2021-10-06 21:49:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:49:15,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:49:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:49:19,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:49:19,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115745313] [2021-10-06 21:49:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115745313] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:49:19,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:49:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-06 21:49:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306690550] [2021-10-06 21:49:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 21:49:19,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:49:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 21:49:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:49:19,327 INFO L87 Difference]: Start difference. First operand 918 states and 3240 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 21:50:05,854 WARN L207 SmtUtils]: Spent 18.97 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 Received shutdown request... [2021-10-06 21:50:17,314 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-06 21:50:17,316 WARN L223 SmtUtils]: Removed 8 from assertion stack [2021-10-06 21:50:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-06 21:50:17,317 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-06 21:50:17,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-10-06 21:50:17,335 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-06 21:50:17,518 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 21:50:17,519 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-06 21:50:17,522 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-06 21:50:17,523 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-06 21:50:17,523 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-06 21:50:17,523 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-06 21:50:17,523 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-06 21:50:17,523 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-06 21:50:17,528 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-06 21:50:17,528 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-06 21:50:17,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 09:50:17 BasicIcfg [2021-10-06 21:50:17,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-06 21:50:17,531 INFO L168 Benchmark]: Toolchain (without parser) took 836858.15 ms. Allocated memory was 162.5 MB in the beginning and 201.3 MB in the end (delta: 38.8 MB). Free memory was 138.2 MB in the beginning and 92.9 MB in the end (delta: 45.3 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,532 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory was 134.6 MB in the beginning and 134.5 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-06 21:50:17,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.76 ms. Allocated memory is still 162.5 MB. Free memory was 137.9 MB in the beginning and 126.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,532 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.02 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 125.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,533 INFO L168 Benchmark]: Boogie Preprocessor took 39.04 ms. Allocated memory is still 162.5 MB. Free memory was 125.2 MB in the beginning and 123.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,533 INFO L168 Benchmark]: RCFGBuilder took 719.25 ms. Allocated memory is still 162.5 MB. Free memory was 123.9 MB in the beginning and 142.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,533 INFO L168 Benchmark]: TraceAbstraction took 835756.42 ms. Allocated memory was 162.5 MB in the beginning and 201.3 MB in the end (delta: 38.8 MB). Free memory was 141.9 MB in the beginning and 92.9 MB in the end (delta: 49.0 MB). Peak memory consumption was 87.8 MB. Max. memory is 8.0 GB. [2021-10-06 21:50:17,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory was 134.6 MB in the beginning and 134.5 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.76 ms. Allocated memory is still 162.5 MB. Free memory was 137.9 MB in the beginning and 126.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.02 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 125.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.04 ms. Allocated memory is still 162.5 MB. Free memory was 125.2 MB in the beginning and 123.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 719.25 ms. Allocated memory is still 162.5 MB. Free memory was 123.9 MB in the beginning and 142.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 835756.42 ms. Allocated memory was 162.5 MB in the beginning and 201.3 MB in the end (delta: 38.8 MB). Free memory was 141.9 MB in the beginning and 92.9 MB in the end (delta: 49.0 MB). Peak memory consumption was 87.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7607.0ms, 84 PlacesBefore, 32 PlacesAfterwards, 83 TransitionsBefore, 27 TransitionsAfterwards, 462 CoEnabledTransitionPairs, 7 FixpointIterations, 48 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 78 TotalNumberOfCompositions, 574 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 563, positive: 561, positive conditional: 0, positive unconditional: 561, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 274, positive: 272, positive conditional: 0, positive unconditional: 272, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 274, positive: 272, positive conditional: 0, positive unconditional: 272, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 23, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 23, negative conditional: 0, negative unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 563, positive: 289, positive conditional: 0, positive unconditional: 289, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 274, unknown conditional: 0, unknown unconditional: 274] , Statistics on independence cache: Total cache size (in pairs): 32, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (918states) and FLOYD_HOARE automaton (currently 58 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 87 for 1004ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 835551.1ms, OverallIterations: 59, TraceHistogramMax: 4, EmptinessCheckTime: 92.3ms, AutomataDifference: 656606.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7676.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2138 SDtfs, 11149 SDslu, 13311 SDs, 0 SdLazy, 15742 SolverSat, 3772 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 138835.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3567 GetRequests, 1162 SyntacticMatches, 5 SemanticMatches, 2399 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 34586 ImplicationChecksByTransitivity, 590970.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=918occurred in iteration=58, InterpolantAutomatonStates: 2087, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 802.5ms AutomataMinimizationTime, 58 MinimizatonAttempts, 13972 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 360.2ms SsaConstructionTime, 4734.4ms SatisfiabilityAnalysisTime, 132364.2ms InterpolantComputationTime, 957 NumberOfCodeBlocks, 957 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 1796 ConstructedInterpolants, 130 QuantifiedInterpolants, 23425 SizeOfPredicates, 504 NumberOfNonLiveVariables, 4009 ConjunctsInSsa, 784 ConjunctsInUnsatCore, 118 InterpolantComputations, 12 PerfectInterpolantSequences, 79/846 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown