/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:13:13,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:13:13,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:13:13,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 17:13:13,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 17:13:13,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:13:13,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:13:13,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:13:13,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:13:13,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:13:13,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:13:13,983 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:13:13,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:13:13,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:13:13,984 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:13:13,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:13:13,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:13:13,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:13:13,986 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:13:13,986 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:13:13,987 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:13:13,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:13:13,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:13:13,987 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:13:13,987 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:13:13,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:13:13,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:13:13,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:13:13,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:13:13,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:13:13,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:13:13,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:13:13,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:13:13,989 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:13:13,989 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:13:13,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:13:13,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:13:13,990 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:13:14,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:13:14,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:13:14,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:13:14,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:13:14,428 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:13:14,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-10-08 17:13:14,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5366bca6/69f5c8e568b441ffb2d6fb0f1fe9da6f/FLAG199249b48 [2021-10-08 17:13:15,134 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:13:15,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-10-08 17:13:15,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5366bca6/69f5c8e568b441ffb2d6fb0f1fe9da6f/FLAG199249b48 [2021-10-08 17:13:15,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5366bca6/69f5c8e568b441ffb2d6fb0f1fe9da6f [2021-10-08 17:13:15,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:13:15,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:13:15,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:13:15,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:13:15,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:13:15,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48636f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15, skipping insertion in model container [2021-10-08 17:13:15,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:13:15,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:13:15,753 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2419,2432] [2021-10-08 17:13:15,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:13:15,782 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:13:15,840 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2419,2432] [2021-10-08 17:13:15,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:13:15,872 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:13:15,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15 WrapperNode [2021-10-08 17:13:15,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:13:15,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:13:15,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:13:15,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:13:15,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:13:15,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:13:15,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:13:15,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:13:15,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:15,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:16,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:16,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:16,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:16,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:13:16,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:13:16,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:13:16,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:13:16,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (1/1) ... [2021-10-08 17:13:16,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:13:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:13:16,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 17:13:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 17:13:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:13:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:13:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:13:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:13:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:13:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:13:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 17:13:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 17:13:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:13:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:13:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:13:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:13:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:13:16,183 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 17:13:16,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:13:16,736 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-08 17:13:16,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:13:16 BoogieIcfgContainer [2021-10-08 17:13:16,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:13:16,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:13:16,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:13:16,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:13:16,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:13:15" (1/3) ... [2021-10-08 17:13:16,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3fb2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:13:16, skipping insertion in model container [2021-10-08 17:13:16,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:13:15" (2/3) ... [2021-10-08 17:13:16,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3fb2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:13:16, skipping insertion in model container [2021-10-08 17:13:16,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:13:16" (3/3) ... [2021-10-08 17:13:16,749 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-10-08 17:13:16,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:13:16,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-08 17:13:16,757 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:13:16,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,888 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,888 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,888 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,889 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,889 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,889 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,892 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,892 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,893 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,893 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,893 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,894 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,894 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,894 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,894 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,895 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,903 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:13:16,908 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 17:13:16,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:13:16,981 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 17:13:16,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-10-08 17:13:17,009 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:13:17,021 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 232 flow [2021-10-08 17:13:17,028 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 232 flow [2021-10-08 17:13:17,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 232 flow [2021-10-08 17:13:17,111 INFO L129 PetriNetUnfolder]: 8/106 cut-off events. [2021-10-08 17:13:17,111 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 17:13:17,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 8/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-10-08 17:13:17,119 INFO L116 LiptonReduction]: Number of co-enabled transitions 936 [2021-10-08 17:13:25,959 INFO L131 LiptonReduction]: Checked pairs total: 1109 [2021-10-08 17:13:25,959 INFO L133 LiptonReduction]: Total number of compositions: 120 [2021-10-08 17:13:25,969 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 25 transitions, 66 flow [2021-10-08 17:13:25,982 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 39 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-08 17:13:25,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:25,990 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-08 17:13:25,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-08 17:13:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 434, now seen corresponding path program 1 times [2021-10-08 17:13:26,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:26,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149542329] [2021-10-08 17:13:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:26,011 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:26,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:26,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 17:13:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-08 17:13:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:26,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:26,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:26,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149542329] [2021-10-08 17:13:26,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149542329] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:26,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:26,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-08 17:13:26,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110484634] [2021-10-08 17:13:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-08 17:13:26,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:26,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-08 17:13:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-08 17:13:26,133 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 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) [2021-10-08 17:13:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:26,147 INFO L93 Difference]: Finished difference Result 36 states and 80 transitions. [2021-10-08 17:13:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-08 17:13:26,149 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 [2021-10-08 17:13:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:26,158 INFO L225 Difference]: With dead ends: 36 [2021-10-08 17:13:26,158 INFO L226 Difference]: Without dead ends: 36 [2021-10-08 17:13:26,159 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 [2021-10-08 17:13:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-08 17:13:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-08 17:13:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 80 transitions. [2021-10-08 17:13:26,197 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 80 transitions. Word has length 1 [2021-10-08 17:13:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:26,197 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 80 transitions. [2021-10-08 17:13:26,197 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) [2021-10-08 17:13:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 80 transitions. [2021-10-08 17:13:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:13:26,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:26,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:13:26,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:26,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:26,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-08 17:13:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 428084, now seen corresponding path program 1 times [2021-10-08 17:13:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:26,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734799676] [2021-10-08 17:13:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:26,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:26,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:26,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 17:13:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:26,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:13:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:26,597 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-08 17:13:26,598 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 [2021-10-08 17:13:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:26,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:26,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:26,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734799676] [2021-10-08 17:13:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734799676] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:26,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:26,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:13:26,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121228432] [2021-10-08 17:13:26,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:26,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:26,690 INFO L87 Difference]: Start difference. First operand 36 states and 80 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) [2021-10-08 17:13:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:26,727 INFO L93 Difference]: Finished difference Result 32 states and 72 transitions. [2021-10-08 17:13:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:26,729 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 [2021-10-08 17:13:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:26,730 INFO L225 Difference]: With dead ends: 32 [2021-10-08 17:13:26,730 INFO L226 Difference]: Without dead ends: 32 [2021-10-08 17:13:26,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-08 17:13:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-08 17:13:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 72 transitions. [2021-10-08 17:13:26,743 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 72 transitions. Word has length 3 [2021-10-08 17:13:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:26,746 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 72 transitions. [2021-10-08 17:13:26,746 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) [2021-10-08 17:13:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 72 transitions. [2021-10-08 17:13:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:13:26,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:26,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:13:26,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:26,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:26,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-08 17:13:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash 428085, now seen corresponding path program 1 times [2021-10-08 17:13:26,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:26,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811391302] [2021-10-08 17:13:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:26,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:26,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:27,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 17:13:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:13:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:27,136 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-08 17:13:27,137 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 [2021-10-08 17:13:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:27,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:27,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811391302] [2021-10-08 17:13:27,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811391302] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:27,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:27,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:27,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972478725] [2021-10-08 17:13:27,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:27,282 INFO L87 Difference]: Start difference. First operand 32 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:27,305 INFO L93 Difference]: Finished difference Result 28 states and 64 transitions. [2021-10-08 17:13:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:13:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:27,307 INFO L225 Difference]: With dead ends: 28 [2021-10-08 17:13:27,308 INFO L226 Difference]: Without dead ends: 28 [2021-10-08 17:13:27,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-08 17:13:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-08 17:13:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 64 transitions. [2021-10-08 17:13:27,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 64 transitions. Word has length 3 [2021-10-08 17:13:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:27,314 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 64 transitions. [2021-10-08 17:13:27,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 64 transitions. [2021-10-08 17:13:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:27,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:27,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:27,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:27,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-08 17:13:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash 411396897, now seen corresponding path program 1 times [2021-10-08 17:13:27,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:27,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039432133] [2021-10-08 17:13:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:27,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:27,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:27,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 17:13:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:13:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:27,621 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-08 17:13:27,621 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 [2021-10-08 17:13:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:27,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:27,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:27,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039432133] [2021-10-08 17:13:27,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039432133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:27,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:27,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:13:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124766398] [2021-10-08 17:13:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:27,702 INFO L87 Difference]: Start difference. First operand 28 states and 64 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) [2021-10-08 17:13:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:27,728 INFO L93 Difference]: Finished difference Result 24 states and 52 transitions. [2021-10-08 17:13:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:27,730 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 [2021-10-08 17:13:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:27,732 INFO L225 Difference]: With dead ends: 24 [2021-10-08 17:13:27,732 INFO L226 Difference]: Without dead ends: 24 [2021-10-08 17:13:27,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-08 17:13:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-08 17:13:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2021-10-08 17:13:27,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 5 [2021-10-08 17:13:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:27,743 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2021-10-08 17:13:27,743 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) [2021-10-08 17:13:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2021-10-08 17:13:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:13:27,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:27,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:13:27,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:27,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:27,958 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-08 17:13:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash 411396899, now seen corresponding path program 1 times [2021-10-08 17:13:27,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:27,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425533841] [2021-10-08 17:13:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:27,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:27,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 17:13:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:13:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:28,135 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-08 17:13:28,135 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 [2021-10-08 17:13:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:28,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:28,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425533841] [2021-10-08 17:13:28,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425533841] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:28,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:28,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:13:28,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204871192] [2021-10-08 17:13:28,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:13:28,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:13:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:28,322 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:28,341 INFO L93 Difference]: Finished difference Result 20 states and 40 transitions. [2021-10-08 17:13:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:13:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:28,344 INFO L225 Difference]: With dead ends: 20 [2021-10-08 17:13:28,344 INFO L226 Difference]: Without dead ends: 20 [2021-10-08 17:13:28,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:13:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-08 17:13:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-08 17:13:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 40 transitions. [2021-10-08 17:13:28,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 40 transitions. Word has length 5 [2021-10-08 17:13:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:28,351 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 40 transitions. [2021-10-08 17:13:28,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 40 transitions. [2021-10-08 17:13:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 17:13:28,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:28,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:28,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:28,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:28,564 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)] === [2021-10-08 17:13:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash -543505712, now seen corresponding path program 1 times [2021-10-08 17:13:28,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:28,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827211170] [2021-10-08 17:13:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:28,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:28,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:28,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 17:13:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:13:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:28,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:28,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827211170] [2021-10-08 17:13:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827211170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:28,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:28,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:13:28,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650182673] [2021-10-08 17:13:28,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:13:28,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:13:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:28,796 INFO L87 Difference]: Start difference. First operand 20 states and 40 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:28,819 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-08 17:13:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:13:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 17:13:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:28,822 INFO L225 Difference]: With dead ends: 37 [2021-10-08 17:13:28,822 INFO L226 Difference]: Without dead ends: 32 [2021-10-08 17:13:28,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:13:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-08 17:13:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-08 17:13:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-08 17:13:28,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-08 17:13:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:28,835 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-08 17:13:28,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-08 17:13:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:13:28,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:28,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:28,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:29,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:29,053 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)] === [2021-10-08 17:13:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 786148917, now seen corresponding path program 1 times [2021-10-08 17:13:29,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:29,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437456719] [2021-10-08 17:13:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:29,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:29,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:29,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 17:13:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:13:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:29,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:29,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437456719] [2021-10-08 17:13:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437456719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:13:29,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:13:29,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:13:29,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749723282] [2021-10-08 17:13:29,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:13:29,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:13:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:13:29,356 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:29,729 INFO L93 Difference]: Finished difference Result 50 states and 95 transitions. [2021-10-08 17:13:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:13:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:13:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:29,731 INFO L225 Difference]: With dead ends: 50 [2021-10-08 17:13:29,731 INFO L226 Difference]: Without dead ends: 42 [2021-10-08 17:13:29,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:13:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-08 17:13:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-10-08 17:13:29,736 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) [2021-10-08 17:13:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-08 17:13:29,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-08 17:13:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:29,737 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-08 17:13:29,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-08 17:13:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:13:29,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:29,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:29,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:29,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:29,947 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)] === [2021-10-08 17:13:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash -688564236, now seen corresponding path program 1 times [2021-10-08 17:13:29,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:29,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153418775] [2021-10-08 17:13:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:29,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:29,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:29,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 17:13:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:13:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:30,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:30,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153418775] [2021-10-08 17:13:30,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153418775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:30,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-08 17:13:30,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440037160] [2021-10-08 17:13:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:13:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:13:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:13:30,303 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:30,533 INFO L93 Difference]: Finished difference Result 58 states and 125 transitions. [2021-10-08 17:13:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:13:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:13:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:30,536 INFO L225 Difference]: With dead ends: 58 [2021-10-08 17:13:30,536 INFO L226 Difference]: Without dead ends: 58 [2021-10-08 17:13:30,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:13:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-08 17:13:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-10-08 17:13:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 107 transitions. [2021-10-08 17:13:30,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 107 transitions. Word has length 12 [2021-10-08 17:13:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:30,543 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 107 transitions. [2021-10-08 17:13:30,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 107 transitions. [2021-10-08 17:13:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 17:13:30,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:30,545 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:30,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:30,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:30,759 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)] === [2021-10-08 17:13:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:30,760 INFO L82 PathProgramCache]: Analyzing trace with hash -890411184, now seen corresponding path program 2 times [2021-10-08 17:13:30,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:30,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890881168] [2021-10-08 17:13:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:13:30,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:30,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 17:13:30,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:13:30,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:13:30,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:31,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:32,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890881168] [2021-10-08 17:13:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890881168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:32,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:32,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-08 17:13:32,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785781518] [2021-10-08 17:13:32,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 17:13:32,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 17:13:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:13:32,129 INFO L87 Difference]: Start difference. First operand 46 states and 107 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:32,251 INFO L93 Difference]: Finished difference Result 89 states and 208 transitions. [2021-10-08 17:13:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:13:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-10-08 17:13:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:32,253 INFO L225 Difference]: With dead ends: 89 [2021-10-08 17:13:32,253 INFO L226 Difference]: Without dead ends: 84 [2021-10-08 17:13:32,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:13:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-08 17:13:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-10-08 17:13:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.4657534246575343) internal successors, (180), 73 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 180 transitions. [2021-10-08 17:13:32,262 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 180 transitions. Word has length 13 [2021-10-08 17:13:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:32,262 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 180 transitions. [2021-10-08 17:13:32,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 180 transitions. [2021-10-08 17:13:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 17:13:32,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:32,264 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:32,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:32,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:32,466 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)] === [2021-10-08 17:13:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1377986123, now seen corresponding path program 1 times [2021-10-08 17:13:32,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:32,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706633882] [2021-10-08 17:13:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:13:32,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:32,469 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:32,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 17:13:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:13:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:13:32,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:13:32,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:32,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706633882] [2021-10-08 17:13:32,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706633882] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:32,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:32,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-08 17:13:32,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890180686] [2021-10-08 17:13:32,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:13:32,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:13:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:13:32,908 INFO L87 Difference]: Start difference. First operand 74 states and 180 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:33,253 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2021-10-08 17:13:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:13:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-08 17:13:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:33,256 INFO L225 Difference]: With dead ends: 126 [2021-10-08 17:13:33,256 INFO L226 Difference]: Without dead ends: 126 [2021-10-08 17:13:33,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:13:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-08 17:13:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2021-10-08 17:13:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.6262626262626263) internal successors, (260), 99 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 260 transitions. [2021-10-08 17:13:33,267 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 260 transitions. Word has length 14 [2021-10-08 17:13:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:33,267 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 260 transitions. [2021-10-08 17:13:33,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 260 transitions. [2021-10-08 17:13:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:13:33,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:33,269 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:33,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:33,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:33,483 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)] === [2021-10-08 17:13:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash 687059952, now seen corresponding path program 2 times [2021-10-08 17:13:33,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:33,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088712026] [2021-10-08 17:13:33,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:13:33,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:33,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:33,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 17:13:33,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:13:33,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:13:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:36,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:36,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088712026] [2021-10-08 17:13:36,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088712026] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:36,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:36,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:13:36,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798510859] [2021-10-08 17:13:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 17:13:36,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 17:13:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:13:36,524 INFO L87 Difference]: Start difference. First operand 100 states and 260 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-10-08 17:13:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:37,643 INFO L93 Difference]: Finished difference Result 221 states and 577 transitions. [2021-10-08 17:13:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 17:13:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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 [2021-10-08 17:13:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:37,647 INFO L225 Difference]: With dead ends: 221 [2021-10-08 17:13:37,647 INFO L226 Difference]: Without dead ends: 216 [2021-10-08 17:13:37,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2351.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:13:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-08 17:13:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 172. [2021-10-08 17:13:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.818713450292398) internal successors, (482), 171 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 482 transitions. [2021-10-08 17:13:37,662 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 482 transitions. Word has length 15 [2021-10-08 17:13:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:37,663 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 482 transitions. [2021-10-08 17:13:37,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-10-08 17:13:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 482 transitions. [2021-10-08 17:13:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:13:37,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:37,665 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:37,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:37,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:37,885 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)] === [2021-10-08 17:13:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1977083562, now seen corresponding path program 3 times [2021-10-08 17:13:37,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:37,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459120458] [2021-10-08 17:13:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:13:37,887 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:37,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:37,889 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:37,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 17:13:38,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 17:13:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:13:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:38,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:40,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:40,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459120458] [2021-10-08 17:13:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459120458] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:40,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:40,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:13:40,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561434062] [2021-10-08 17:13:40,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 17:13:40,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 17:13:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:13:40,278 INFO L87 Difference]: Start difference. First operand 172 states and 482 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-10-08 17:13:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:41,240 INFO L93 Difference]: Finished difference Result 271 states and 750 transitions. [2021-10-08 17:13:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:13:41,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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 [2021-10-08 17:13:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:41,244 INFO L225 Difference]: With dead ends: 271 [2021-10-08 17:13:41,244 INFO L226 Difference]: Without dead ends: 266 [2021-10-08 17:13:41,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:13:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-08 17:13:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2021-10-08 17:13:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 3.0191387559808613) internal successors, (631), 209 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 631 transitions. [2021-10-08 17:13:41,261 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 631 transitions. Word has length 15 [2021-10-08 17:13:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:41,261 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 631 transitions. [2021-10-08 17:13:41,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-10-08 17:13:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 631 transitions. [2021-10-08 17:13:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:13:41,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:41,264 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:41,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:41,477 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)] === [2021-10-08 17:13:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -506112592, now seen corresponding path program 4 times [2021-10-08 17:13:41,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:41,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956288501] [2021-10-08 17:13:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:13:41,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:41,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:41,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 17:13:41,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:13:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:13:41,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:42,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:43,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956288501] [2021-10-08 17:13:43,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956288501] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:43,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:43,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:13:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270593572] [2021-10-08 17:13:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 17:13:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 17:13:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:13:43,499 INFO L87 Difference]: Start difference. First operand 210 states and 631 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:44,339 INFO L93 Difference]: Finished difference Result 277 states and 820 transitions. [2021-10-08 17:13:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:13:44,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 17:13:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:44,343 INFO L225 Difference]: With dead ends: 277 [2021-10-08 17:13:44,343 INFO L226 Difference]: Without dead ends: 272 [2021-10-08 17:13:44,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:13:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-08 17:13:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 256. [2021-10-08 17:13:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.0313725490196077) internal successors, (773), 255 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 773 transitions. [2021-10-08 17:13:44,359 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 773 transitions. Word has length 15 [2021-10-08 17:13:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:44,360 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 773 transitions. [2021-10-08 17:13:44,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 773 transitions. [2021-10-08 17:13:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:13:44,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:44,362 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:44,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:44,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:44,578 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)] === [2021-10-08 17:13:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -413933716, now seen corresponding path program 5 times [2021-10-08 17:13:44,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:44,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662745278] [2021-10-08 17:13:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:13:44,580 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:44,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:44,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 17:13:44,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-08 17:13:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:13:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:45,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:46,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662745278] [2021-10-08 17:13:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662745278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:46,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:46,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:13:46,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875697780] [2021-10-08 17:13:46,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 17:13:46,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 17:13:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:13:46,572 INFO L87 Difference]: Start difference. First operand 256 states and 773 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:47,493 INFO L93 Difference]: Finished difference Result 347 states and 1070 transitions. [2021-10-08 17:13:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:13:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 17:13:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:47,498 INFO L225 Difference]: With dead ends: 347 [2021-10-08 17:13:47,498 INFO L226 Difference]: Without dead ends: 342 [2021-10-08 17:13:47,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1066.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:13:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-08 17:13:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 282. [2021-10-08 17:13:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.1530249110320283) internal successors, (886), 281 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 886 transitions. [2021-10-08 17:13:47,511 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 886 transitions. Word has length 15 [2021-10-08 17:13:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:47,512 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 886 transitions. [2021-10-08 17:13:47,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 886 transitions. [2021-10-08 17:13:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:13:47,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:47,514 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:47,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-08 17:13:47,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:47,725 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)] === [2021-10-08 17:13:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash 704427002, now seen corresponding path program 6 times [2021-10-08 17:13:47,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:47,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628023946] [2021-10-08 17:13:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:13:47,728 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:47,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:47,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 17:13:47,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 17:13:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:13:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:48,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:50,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:50,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628023946] [2021-10-08 17:13:50,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628023946] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:50,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:50,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:13:50,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673267912] [2021-10-08 17:13:50,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:13:50,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:13:50,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:13:50,043 INFO L87 Difference]: Start difference. First operand 282 states and 886 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:13:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:52,038 INFO L93 Difference]: Finished difference Result 656 states and 1871 transitions. [2021-10-08 17:13:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:13:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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 [2021-10-08 17:13:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:52,045 INFO L225 Difference]: With dead ends: 656 [2021-10-08 17:13:52,045 INFO L226 Difference]: Without dead ends: 656 [2021-10-08 17:13:52,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1698.0ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:13:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-08 17:13:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 388. [2021-10-08 17:13:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.2764857881136953) internal successors, (1268), 387 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1268 transitions. [2021-10-08 17:13:52,070 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1268 transitions. Word has length 16 [2021-10-08 17:13:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:52,071 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1268 transitions. [2021-10-08 17:13:52,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:13:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1268 transitions. [2021-10-08 17:13:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:13:52,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:52,074 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:52,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:52,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:52,283 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)] === [2021-10-08 17:13:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2119569324, now seen corresponding path program 7 times [2021-10-08 17:13:52,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:52,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855269745] [2021-10-08 17:13:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:13:52,286 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:52,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:52,289 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:52,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 17:13:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:13:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:13:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:54,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:54,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855269745] [2021-10-08 17:13:54,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855269745] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:54,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:54,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:13:54,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822084454] [2021-10-08 17:13:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:13:54,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:13:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:13:54,512 INFO L87 Difference]: Start difference. First operand 388 states and 1268 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:13:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:13:56,346 INFO L93 Difference]: Finished difference Result 680 states and 2022 transitions. [2021-10-08 17:13:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:13:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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 [2021-10-08 17:13:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:13:56,353 INFO L225 Difference]: With dead ends: 680 [2021-10-08 17:13:56,353 INFO L226 Difference]: Without dead ends: 680 [2021-10-08 17:13:56,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1550.4ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:13:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-08 17:13:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 426. [2021-10-08 17:13:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.348235294117647) internal successors, (1423), 425 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:13:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1423 transitions. [2021-10-08 17:13:56,379 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1423 transitions. Word has length 16 [2021-10-08 17:13:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:13:56,380 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1423 transitions. [2021-10-08 17:13:56,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:13:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1423 transitions. [2021-10-08 17:13:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:13:56,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:13:56,382 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:13:56,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 17:13:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:13:56,596 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)] === [2021-10-08 17:13:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:13:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1374708908, now seen corresponding path program 8 times [2021-10-08 17:13:56,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:13:56,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860703675] [2021-10-08 17:13:56,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:13:56,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:13:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:13:56,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:13:56,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 17:13:56,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:13:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:13:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:13:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:13:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:57,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:13:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:13:58,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:13:58,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860703675] [2021-10-08 17:13:58,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860703675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:13:58,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:13:58,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:13:58,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38670634] [2021-10-08 17:13:58,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:13:58,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:13:58,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:13:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:13:58,874 INFO L87 Difference]: Start difference. First operand 426 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:01,224 INFO L93 Difference]: Finished difference Result 562 states and 1788 transitions. [2021-10-08 17:14:01,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 17:14:01,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:14:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:01,230 INFO L225 Difference]: With dead ends: 562 [2021-10-08 17:14:01,230 INFO L226 Difference]: Without dead ends: 548 [2021-10-08 17:14:01,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1928.0ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:14:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-10-08 17:14:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 446. [2021-10-08 17:14:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.346067415730337) internal successors, (1489), 445 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1489 transitions. [2021-10-08 17:14:01,252 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1489 transitions. Word has length 16 [2021-10-08 17:14:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:01,252 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1489 transitions. [2021-10-08 17:14:01,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1489 transitions. [2021-10-08 17:14:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:14:01,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:01,255 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:01,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-08 17:14:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:14:01,469 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)] === [2021-10-08 17:14:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -508628366, now seen corresponding path program 9 times [2021-10-08 17:14:01,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:01,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053422150] [2021-10-08 17:14:01,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:14:01,470 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:01,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:01,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:14:01,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 17:14:01,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:14:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:14:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:02,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:03,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:03,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053422150] [2021-10-08 17:14:03,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053422150] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:03,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:14:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913147284] [2021-10-08 17:14:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:14:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:14:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:14:03,689 INFO L87 Difference]: Start difference. First operand 446 states and 1489 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:14:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:05,989 INFO L93 Difference]: Finished difference Result 810 states and 2482 transitions. [2021-10-08 17:14:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:14:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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 [2021-10-08 17:14:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:05,997 INFO L225 Difference]: With dead ends: 810 [2021-10-08 17:14:05,997 INFO L226 Difference]: Without dead ends: 810 [2021-10-08 17:14:05,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1808.3ms TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:14:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-10-08 17:14:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 524. [2021-10-08 17:14:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.45697896749522) internal successors, (1808), 523 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1808 transitions. [2021-10-08 17:14:06,024 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1808 transitions. Word has length 16 [2021-10-08 17:14:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:06,024 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1808 transitions. [2021-10-08 17:14:06,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-10-08 17:14:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1808 transitions. [2021-10-08 17:14:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:14:06,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:06,027 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:06,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:06,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:14:06,240 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)] === [2021-10-08 17:14:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 236232050, now seen corresponding path program 10 times [2021-10-08 17:14:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:06,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269884225] [2021-10-08 17:14:06,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:14:06,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:06,246 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:14:06,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 17:14:06,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:14:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:14:06,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:07,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:08,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:08,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269884225] [2021-10-08 17:14:08,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269884225] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:08,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:08,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:14:08,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900166607] [2021-10-08 17:14:08,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:14:08,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:14:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:14:08,705 INFO L87 Difference]: Start difference. First operand 524 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:11,445 INFO L93 Difference]: Finished difference Result 704 states and 2302 transitions. [2021-10-08 17:14:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:14:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:14:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:11,453 INFO L225 Difference]: With dead ends: 704 [2021-10-08 17:14:11,453 INFO L226 Difference]: Without dead ends: 694 [2021-10-08 17:14:11,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2294.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:14:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-08 17:14:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 554. [2021-10-08 17:14:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.481012658227848) internal successors, (1925), 553 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1925 transitions. [2021-10-08 17:14:11,478 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1925 transitions. Word has length 16 [2021-10-08 17:14:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:11,479 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1925 transitions. [2021-10-08 17:14:11,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1925 transitions. [2021-10-08 17:14:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:14:11,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:11,482 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:11,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:11,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:14:11,695 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)] === [2021-10-08 17:14:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1559049168, now seen corresponding path program 11 times [2021-10-08 17:14:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:11,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371566908] [2021-10-08 17:14:11,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:14:11,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:11,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:14:11,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 17:14:12,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:14:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 17:14:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:14:12,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:14:15,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:15,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371566908] [2021-10-08 17:14:15,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371566908] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:15,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:15,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 17:14:15,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519700416] [2021-10-08 17:14:15,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:14:15,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:14:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-10-08 17:14:15,202 INFO L87 Difference]: Start difference. First operand 554 states and 1925 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-10-08 17:14:23,443 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 19 [2021-10-08 17:14:29,607 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-08 17:14:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:29,925 INFO L93 Difference]: Finished difference Result 1388 states and 4567 transitions. [2021-10-08 17:14:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 17:14:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 [2021-10-08 17:14:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:29,939 INFO L225 Difference]: With dead ends: 1388 [2021-10-08 17:14:29,939 INFO L226 Difference]: Without dead ends: 1382 [2021-10-08 17:14:29,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 16684.5ms TimeCoverageRelationStatistics Valid=64, Invalid=174, Unknown=2, NotChecked=0, Total=240 [2021-10-08 17:14:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-10-08 17:14:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1190. [2021-10-08 17:14:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.432296047098402) internal successors, (4081), 1189 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 4081 transitions. [2021-10-08 17:14:29,990 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 4081 transitions. Word has length 16 [2021-10-08 17:14:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:29,991 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 4081 transitions. [2021-10-08 17:14:29,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-10-08 17:14:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 4081 transitions. [2021-10-08 17:14:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:14:29,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:29,996 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:30,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:30,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:14:30,210 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)] === [2021-10-08 17:14:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1204110858, now seen corresponding path program 12 times [2021-10-08 17:14:30,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:30,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730409197] [2021-10-08 17:14:30,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:14:30,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:30,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:14:30,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 17:14:30,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 17:14:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 17:14:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:31,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:34,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:34,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730409197] [2021-10-08 17:14:34,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730409197] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:34,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:14:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472870035] [2021-10-08 17:14:34,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 17:14:34,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 17:14:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:14:34,045 INFO L87 Difference]: Start difference. First operand 1190 states and 4081 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:37,080 INFO L93 Difference]: Finished difference Result 1337 states and 4340 transitions. [2021-10-08 17:14:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 17:14:37,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-08 17:14:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:37,093 INFO L225 Difference]: With dead ends: 1337 [2021-10-08 17:14:37,093 INFO L226 Difference]: Without dead ends: 1332 [2021-10-08 17:14:37,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3166.8ms TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:14:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-10-08 17:14:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1168. [2021-10-08 17:14:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.424164524421594) internal successors, (3996), 1167 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3996 transitions. [2021-10-08 17:14:37,168 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3996 transitions. Word has length 17 [2021-10-08 17:14:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:37,168 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3996 transitions. [2021-10-08 17:14:37,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3996 transitions. [2021-10-08 17:14:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:14:37,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:37,173 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:37,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:14:37,388 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)] === [2021-10-08 17:14:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1283732084, now seen corresponding path program 13 times [2021-10-08 17:14:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:37,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420778616] [2021-10-08 17:14:37,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:14:37,389 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:37,391 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:14:37,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 17:14:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:14:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:14:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:14:38,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:40,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:40,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420778616] [2021-10-08 17:14:40,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420778616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:40,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:40,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-08 17:14:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868102746] [2021-10-08 17:14:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:14:40,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:14:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:14:40,612 INFO L87 Difference]: Start difference. First operand 1168 states and 3996 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) [2021-10-08 17:14:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:50,004 INFO L93 Difference]: Finished difference Result 1554 states and 4917 transitions. [2021-10-08 17:14:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-08 17:14:50,005 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 [2021-10-08 17:14:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:50,017 INFO L225 Difference]: With dead ends: 1554 [2021-10-08 17:14:50,018 INFO L226 Difference]: Without dead ends: 1548 [2021-10-08 17:14:50,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 8627.2ms TimeCoverageRelationStatistics Valid=506, Invalid=1750, Unknown=0, NotChecked=0, Total=2256 [2021-10-08 17:14:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-10-08 17:14:50,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1192. [2021-10-08 17:14:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.413937867338371) internal successors, (4066), 1191 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 4066 transitions. [2021-10-08 17:14:50,080 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 4066 transitions. Word has length 17 [2021-10-08 17:14:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:50,080 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 4066 transitions. [2021-10-08 17:14:50,080 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) [2021-10-08 17:14:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 4066 transitions. [2021-10-08 17:14:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:14:50,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:50,085 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:50,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:50,303 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 [2021-10-08 17:14:50,304 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)] === [2021-10-08 17:14:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash 630819408, now seen corresponding path program 14 times [2021-10-08 17:14:50,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:50,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235465870] [2021-10-08 17:14:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:14:50,307 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:50,308 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) [2021-10-08 17:14:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 17:14:50,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:14:50,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:50,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 17:14:50,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:51,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:53,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:53,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235465870] [2021-10-08 17:14:53,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235465870] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:53,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:53,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:14:53,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591824216] [2021-10-08 17:14:53,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 17:14:53,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:53,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 17:14:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:14:53,744 INFO L87 Difference]: Start difference. First operand 1192 states and 4066 transitions. Second operand has 15 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) [2021-10-08 17:14:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:14:56,408 INFO L93 Difference]: Finished difference Result 1563 states and 5236 transitions. [2021-10-08 17:14:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:14:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 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 17 [2021-10-08 17:14:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:14:56,419 INFO L225 Difference]: With dead ends: 1563 [2021-10-08 17:14:56,419 INFO L226 Difference]: Without dead ends: 1558 [2021-10-08 17:14:56,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2669.9ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-10-08 17:14:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-10-08 17:14:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1420. [2021-10-08 17:14:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.4834390415785763) internal successors, (4943), 1419 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:14:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4943 transitions. [2021-10-08 17:14:56,471 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4943 transitions. Word has length 17 [2021-10-08 17:14:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:14:56,471 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 4943 transitions. [2021-10-08 17:14:56,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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) [2021-10-08 17:14:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4943 transitions. [2021-10-08 17:14:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:14:56,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:14:56,477 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:14:56,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:14:56,691 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 [2021-10-08 17:14:56,691 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)] === [2021-10-08 17:14:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:14:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash -810561419, now seen corresponding path program 15 times [2021-10-08 17:14:56,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:14:56,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263150854] [2021-10-08 17:14:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:14:56,693 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:14:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:14:56,696 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) [2021-10-08 17:14:56,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-08 17:14:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:14:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:14:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:14:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:14:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:14:57,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:14:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:14:59,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:14:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263150854] [2021-10-08 17:14:59,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263150854] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:14:59,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:14:59,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-08 17:14:59,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036943877] [2021-10-08 17:14:59,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:14:59,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:14:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:14:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:14:59,981 INFO L87 Difference]: Start difference. First operand 1420 states and 4943 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) [2021-10-08 17:15:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:04,966 INFO L93 Difference]: Finished difference Result 1782 states and 5898 transitions. [2021-10-08 17:15:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 17:15:04,967 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 18 [2021-10-08 17:15:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:04,977 INFO L225 Difference]: With dead ends: 1782 [2021-10-08 17:15:04,977 INFO L226 Difference]: Without dead ends: 1742 [2021-10-08 17:15:04,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4290.9ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-10-08 17:15:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-10-08 17:15:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1504. [2021-10-08 17:15:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.453759148369927) internal successors, (5191), 1503 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5191 transitions. [2021-10-08 17:15:05,034 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5191 transitions. Word has length 18 [2021-10-08 17:15:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:05,034 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5191 transitions. [2021-10-08 17:15:05,034 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) [2021-10-08 17:15:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5191 transitions. [2021-10-08 17:15:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:15:05,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:05,040 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:15:05,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:05,254 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 [2021-10-08 17:15:05,254 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)] === [2021-10-08 17:15:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1089171, now seen corresponding path program 16 times [2021-10-08 17:15:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:05,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174481478] [2021-10-08 17:15:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:15:05,257 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:05,258 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) [2021-10-08 17:15:05,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 17:15:05,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:15:05,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:05,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:15:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:15:06,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:15:07,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174481478] [2021-10-08 17:15:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174481478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:15:07,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:15:07,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:15:07,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954610124] [2021-10-08 17:15:07,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:15:07,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:15:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:15:07,670 INFO L87 Difference]: Start difference. First operand 1504 states and 5191 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:10,618 INFO L93 Difference]: Finished difference Result 1804 states and 5988 transitions. [2021-10-08 17:15:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:15:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-08 17:15:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:10,629 INFO L225 Difference]: With dead ends: 1804 [2021-10-08 17:15:10,629 INFO L226 Difference]: Without dead ends: 1772 [2021-10-08 17:15:10,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2499.5ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:15:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-10-08 17:15:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1530. [2021-10-08 17:15:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.458469587965991) internal successors, (5288), 1529 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5288 transitions. [2021-10-08 17:15:10,687 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5288 transitions. Word has length 18 [2021-10-08 17:15:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:10,687 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 5288 transitions. [2021-10-08 17:15:10,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5288 transitions. [2021-10-08 17:15:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:15:10,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:10,694 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:15:10,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:10,907 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 [2021-10-08 17:15:10,908 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)] === [2021-10-08 17:15:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1418687067, now seen corresponding path program 17 times [2021-10-08 17:15:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:10,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744720003] [2021-10-08 17:15:10,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:15:10,910 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:10,912 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) [2021-10-08 17:15:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 17:15:11,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 17:15:11,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:15:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:15:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:15:17,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744720003] [2021-10-08 17:15:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744720003] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:15:17,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:15:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:15:17,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552431389] [2021-10-08 17:15:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:15:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:15:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2021-10-08 17:15:17,495 INFO L87 Difference]: Start difference. First operand 1530 states and 5288 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-10-08 17:15:34,178 WARN L207 SmtUtils]: Spent 14.13 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-08 17:15:40,827 WARN L207 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-10-08 17:15:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:43,545 INFO L93 Difference]: Finished difference Result 3012 states and 9865 transitions. [2021-10-08 17:15:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:15:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 18 [2021-10-08 17:15:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:43,566 INFO L225 Difference]: With dead ends: 3012 [2021-10-08 17:15:43,566 INFO L226 Difference]: Without dead ends: 2932 [2021-10-08 17:15:43,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 30083.6ms TimeCoverageRelationStatistics Valid=125, Invalid=377, Unknown=4, NotChecked=0, Total=506 [2021-10-08 17:15:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-10-08 17:15:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2166. [2021-10-08 17:15:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.284064665127021) internal successors, (7110), 2165 states have internal predecessors, (7110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7110 transitions. [2021-10-08 17:15:43,656 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7110 transitions. Word has length 18 [2021-10-08 17:15:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 7110 transitions. [2021-10-08 17:15:43,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-10-08 17:15:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7110 transitions. [2021-10-08 17:15:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:15:43,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:43,661 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:15:43,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:43,876 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 [2021-10-08 17:15:43,876 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)] === [2021-10-08 17:15:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash 561627734, now seen corresponding path program 18 times [2021-10-08 17:15:43,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:43,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317883260] [2021-10-08 17:15:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:15:43,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:43,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:43,880 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) [2021-10-08 17:15:43,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-08 17:15:44,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 17:15:44,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:15:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:15:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:15:46,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:15:50,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:50,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317883260] [2021-10-08 17:15:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317883260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:15:50,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:15:50,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:15:50,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724648816] [2021-10-08 17:15:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:15:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:15:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:15:50,140 INFO L87 Difference]: Start difference. First operand 2166 states and 7110 transitions. Second operand has 19 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) [2021-10-08 17:15:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:15:51,880 INFO L93 Difference]: Finished difference Result 3065 states and 10117 transitions. [2021-10-08 17:15:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:15:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 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 19 [2021-10-08 17:15:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:15:51,893 INFO L225 Difference]: With dead ends: 3065 [2021-10-08 17:15:51,893 INFO L226 Difference]: Without dead ends: 3058 [2021-10-08 17:15:51,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2668.6ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:15:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-10-08 17:15:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2562. [2021-10-08 17:15:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 3.381491604841859) internal successors, (8660), 2561 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:15:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8660 transitions. [2021-10-08 17:15:51,977 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8660 transitions. Word has length 19 [2021-10-08 17:15:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:15:51,978 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 8660 transitions. [2021-10-08 17:15:51,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 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) [2021-10-08 17:15:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8660 transitions. [2021-10-08 17:15:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:15:51,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:15:51,984 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:15:52,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-08 17:15:52,197 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 [2021-10-08 17:15:52,197 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)] === [2021-10-08 17:15:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:15:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash -990488726, now seen corresponding path program 19 times [2021-10-08 17:15:52,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:15:52,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093825075] [2021-10-08 17:15:52,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:15:52,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:15:52,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:15:52,201 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) [2021-10-08 17:15:52,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-08 17:15:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:15:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:15:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:15:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:15:54,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:15:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:15:59,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:15:59,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093825075] [2021-10-08 17:15:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093825075] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:15:59,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:15:59,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:15:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403487633] [2021-10-08 17:15:59,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:15:59,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:15:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:15:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=275, Unknown=1, NotChecked=0, Total=342 [2021-10-08 17:15:59,525 INFO L87 Difference]: Start difference. First operand 2562 states and 8660 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:01,942 INFO L93 Difference]: Finished difference Result 3967 states and 13609 transitions. [2021-10-08 17:16:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:16:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:16:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:01,958 INFO L225 Difference]: With dead ends: 3967 [2021-10-08 17:16:01,958 INFO L226 Difference]: Without dead ends: 3956 [2021-10-08 17:16:01,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4834.5ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-10-08 17:16:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2021-10-08 17:16:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3792. [2021-10-08 17:16:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 3.487997889738855) internal successors, (13223), 3791 states have internal predecessors, (13223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 13223 transitions. [2021-10-08 17:16:02,108 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 13223 transitions. Word has length 19 [2021-10-08 17:16:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:02,109 INFO L470 AbstractCegarLoop]: Abstraction has 3792 states and 13223 transitions. [2021-10-08 17:16:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 13223 transitions. [2021-10-08 17:16:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:02,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:02,118 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:02,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:02,320 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 [2021-10-08 17:16:02,320 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)] === [2021-10-08 17:16:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1704040716, now seen corresponding path program 20 times [2021-10-08 17:16:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:02,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581242841] [2021-10-08 17:16:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:16:02,322 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:02,324 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) [2021-10-08 17:16:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 17:16:03,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:16:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:16:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:04,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:16:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:07,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:16:07,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581242841] [2021-10-08 17:16:07,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581242841] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:16:07,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:16:07,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:16:07,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475991128] [2021-10-08 17:16:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:16:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:16:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:16:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:16:07,745 INFO L87 Difference]: Start difference. First operand 3792 states and 13223 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:10,140 INFO L93 Difference]: Finished difference Result 6065 states and 21528 transitions. [2021-10-08 17:16:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:16:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:16:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:10,168 INFO L225 Difference]: With dead ends: 6065 [2021-10-08 17:16:10,168 INFO L226 Difference]: Without dead ends: 6056 [2021-10-08 17:16:10,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2560.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:16:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-10-08 17:16:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5148. [2021-10-08 17:16:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5147 states have (on average 3.588303866329901) internal successors, (18469), 5147 states have internal predecessors, (18469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 18469 transitions. [2021-10-08 17:16:10,377 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 18469 transitions. Word has length 19 [2021-10-08 17:16:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 5148 states and 18469 transitions. [2021-10-08 17:16:10,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 18469 transitions. [2021-10-08 17:16:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:10,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:10,389 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:10,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:10,603 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 [2021-10-08 17:16:10,603 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)] === [2021-10-08 17:16:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash 636807150, now seen corresponding path program 21 times [2021-10-08 17:16:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916161102] [2021-10-08 17:16:10,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:16:10,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:10,607 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) [2021-10-08 17:16:10,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 17:16:11,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:16:11,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:16:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:13,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:16:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:16,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:16:16,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916161102] [2021-10-08 17:16:16,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916161102] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:16:16,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:16:16,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:16:16,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857506198] [2021-10-08 17:16:16,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:16:16,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:16:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:16:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:16:16,572 INFO L87 Difference]: Start difference. First operand 5148 states and 18469 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:22,932 INFO L93 Difference]: Finished difference Result 8407 states and 30040 transitions. [2021-10-08 17:16:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-08 17:16:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:16:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:22,972 INFO L225 Difference]: With dead ends: 8407 [2021-10-08 17:16:22,972 INFO L226 Difference]: Without dead ends: 8402 [2021-10-08 17:16:22,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6034.6ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-10-08 17:16:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-10-08 17:16:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 7814. [2021-10-08 17:16:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.6280558044285165) internal successors, (28346), 7813 states have internal predecessors, (28346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 28346 transitions. [2021-10-08 17:16:23,377 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 28346 transitions. Word has length 19 [2021-10-08 17:16:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:23,377 INFO L470 AbstractCegarLoop]: Abstraction has 7814 states and 28346 transitions. [2021-10-08 17:16:23,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 28346 transitions. [2021-10-08 17:16:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:23,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:23,394 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:23,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:23,610 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 [2021-10-08 17:16:23,610 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)] === [2021-10-08 17:16:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1427376792, now seen corresponding path program 22 times [2021-10-08 17:16:23,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:23,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682282782] [2021-10-08 17:16:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:16:23,611 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:23,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:23,613 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) [2021-10-08 17:16:23,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 17:16:24,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:16:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:16:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:26,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:16:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:30,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:16:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682282782] [2021-10-08 17:16:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682282782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:16:30,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:16:30,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:16:30,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358035497] [2021-10-08 17:16:30,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:16:30,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:16:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:16:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:16:30,347 INFO L87 Difference]: Start difference. First operand 7814 states and 28346 transitions. Second operand has 19 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) [2021-10-08 17:16:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:34,059 INFO L93 Difference]: Finished difference Result 11211 states and 40229 transitions. [2021-10-08 17:16:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-08 17:16:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 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 19 [2021-10-08 17:16:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:34,091 INFO L225 Difference]: With dead ends: 11211 [2021-10-08 17:16:34,091 INFO L226 Difference]: Without dead ends: 11200 [2021-10-08 17:16:34,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 4501.7ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:16:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2021-10-08 17:16:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 10860. [2021-10-08 17:16:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10860 states, 10859 states have (on average 3.6370752371304906) internal successors, (39495), 10859 states have internal predecessors, (39495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 39495 transitions. [2021-10-08 17:16:34,610 INFO L78 Accepts]: Start accepts. Automaton has 10860 states and 39495 transitions. Word has length 19 [2021-10-08 17:16:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:34,610 INFO L470 AbstractCegarLoop]: Abstraction has 10860 states and 39495 transitions. [2021-10-08 17:16:34,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 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) [2021-10-08 17:16:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10860 states and 39495 transitions. [2021-10-08 17:16:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:34,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:34,638 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:34,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:34,852 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 [2021-10-08 17:16:34,854 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)] === [2021-10-08 17:16:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2140355502, now seen corresponding path program 23 times [2021-10-08 17:16:34,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:34,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11245549] [2021-10-08 17:16:34,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:16:34,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:34,857 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) [2021-10-08 17:16:34,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-08 17:16:35,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 17:16:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:16:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:37,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:16:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:41,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:16:41,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11245549] [2021-10-08 17:16:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11245549] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:16:41,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:16:41,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:16:41,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749343028] [2021-10-08 17:16:41,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:16:41,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:16:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:16:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:16:41,151 INFO L87 Difference]: Start difference. First operand 10860 states and 39495 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:44,232 INFO L93 Difference]: Finished difference Result 13297 states and 48112 transitions. [2021-10-08 17:16:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 17:16:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:16:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:44,273 INFO L225 Difference]: With dead ends: 13297 [2021-10-08 17:16:44,273 INFO L226 Difference]: Without dead ends: 13292 [2021-10-08 17:16:44,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3576.3ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:16:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13292 states. [2021-10-08 17:16:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13292 to 9722. [2021-10-08 17:16:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9722 states, 9721 states have (on average 3.606213352535747) internal successors, (35056), 9721 states have internal predecessors, (35056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 35056 transitions. [2021-10-08 17:16:44,682 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 35056 transitions. Word has length 19 [2021-10-08 17:16:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:44,682 INFO L470 AbstractCegarLoop]: Abstraction has 9722 states and 35056 transitions. [2021-10-08 17:16:44,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:16:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 35056 transitions. [2021-10-08 17:16:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:44,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:44,704 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:44,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:44,917 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 [2021-10-08 17:16:44,918 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)] === [2021-10-08 17:16:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1749774860, now seen corresponding path program 24 times [2021-10-08 17:16:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:44,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562769233] [2021-10-08 17:16:44,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:16:44,921 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:44,922 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) [2021-10-08 17:16:44,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-08 17:16:45,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 17:16:45,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:16:45,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:16:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:51,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:16:51,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562769233] [2021-10-08 17:16:51,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562769233] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:16:51,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:16:51,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:16:51,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364281922] [2021-10-08 17:16:51,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:16:51,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:16:51,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:16:51,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:16:51,433 INFO L87 Difference]: Start difference. First operand 9722 states and 35056 transitions. Second operand has 19 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) [2021-10-08 17:16:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:16:54,462 INFO L93 Difference]: Finished difference Result 13797 states and 49496 transitions. [2021-10-08 17:16:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 17:16:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 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 19 [2021-10-08 17:16:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:16:54,513 INFO L225 Difference]: With dead ends: 13797 [2021-10-08 17:16:54,513 INFO L226 Difference]: Without dead ends: 13792 [2021-10-08 17:16:54,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3526.4ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:16:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13792 states. [2021-10-08 17:16:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13792 to 12478. [2021-10-08 17:16:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12478 states, 12477 states have (on average 3.632603991344073) internal successors, (45324), 12477 states have internal predecessors, (45324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:16:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12478 states to 12478 states and 45324 transitions. [2021-10-08 17:16:55,012 INFO L78 Accepts]: Start accepts. Automaton has 12478 states and 45324 transitions. Word has length 19 [2021-10-08 17:16:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:16:55,012 INFO L470 AbstractCegarLoop]: Abstraction has 12478 states and 45324 transitions. [2021-10-08 17:16:55,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 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) [2021-10-08 17:16:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12478 states and 45324 transitions. [2021-10-08 17:16:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:16:55,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:16:55,036 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:16:55,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-08 17:16:55,244 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 [2021-10-08 17:16:55,245 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)] === [2021-10-08 17:16:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:16:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -792727574, now seen corresponding path program 25 times [2021-10-08 17:16:55,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:16:55,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165290673] [2021-10-08 17:16:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:16:55,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:16:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:16:55,249 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) [2021-10-08 17:16:55,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-08 17:16:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:16:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:16:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:16:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:16:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:17:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:17:01,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:17:01,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165290673] [2021-10-08 17:17:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165290673] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:17:01,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:17:01,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:17:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456681118] [2021-10-08 17:17:01,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:17:01,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:17:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:17:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:17:01,295 INFO L87 Difference]: Start difference. First operand 12478 states and 45324 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:17:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:17:04,126 INFO L93 Difference]: Finished difference Result 16607 states and 60359 transitions. [2021-10-08 17:17:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:17:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:17:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:17:04,172 INFO L225 Difference]: With dead ends: 16607 [2021-10-08 17:17:04,173 INFO L226 Difference]: Without dead ends: 16602 [2021-10-08 17:17:04,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3239.4ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-10-08 17:17:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16602 states. [2021-10-08 17:17:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16602 to 13662. [2021-10-08 17:17:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13661 states have (on average 3.617158333943342) internal successors, (49414), 13661 states have internal predecessors, (49414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:17:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 49414 transitions. [2021-10-08 17:17:04,632 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 49414 transitions. Word has length 19 [2021-10-08 17:17:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:17:04,632 INFO L470 AbstractCegarLoop]: Abstraction has 13662 states and 49414 transitions. [2021-10-08 17:17:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:17:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 49414 transitions. [2021-10-08 17:17:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:17:04,736 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:17:04,737 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:17:04,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-08 17:17:04,939 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 [2021-10-08 17:17:04,940 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)] === [2021-10-08 17:17:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:17:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1204710196, now seen corresponding path program 26 times [2021-10-08 17:17:04,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:17:04,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619616074] [2021-10-08 17:17:04,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:17:04,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:17:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:17:04,943 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) [2021-10-08 17:17:04,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-08 17:17:06,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:17:06,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:17:06,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:17:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:17:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:17:07,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:17:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:17:11,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:17:11,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619616074] [2021-10-08 17:17:11,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619616074] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:17:11,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:17:11,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 17:17:11,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190744234] [2021-10-08 17:17:11,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 17:17:11,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:17:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 17:17:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-10-08 17:17:11,629 INFO L87 Difference]: Start difference. First operand 13662 states and 49414 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:17:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:17:17,344 INFO L93 Difference]: Finished difference Result 15467 states and 55711 transitions. [2021-10-08 17:17:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-08 17:17:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 [2021-10-08 17:17:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:17:17,389 INFO L225 Difference]: With dead ends: 15467 [2021-10-08 17:17:17,389 INFO L226 Difference]: Without dead ends: 15458 [2021-10-08 17:17:17,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 6113.6ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-10-08 17:17:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15458 states. [2021-10-08 17:17:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15458 to 15024. [2021-10-08 17:17:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15024 states, 15023 states have (on average 3.627038540903947) internal successors, (54489), 15023 states have internal predecessors, (54489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:17:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 54489 transitions. [2021-10-08 17:17:17,875 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 54489 transitions. Word has length 19 [2021-10-08 17:17:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:17:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 15024 states and 54489 transitions. [2021-10-08 17:17:17,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-10-08 17:17:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 54489 transitions. [2021-10-08 17:17:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:17:17,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:17:17,898 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:17:17,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-08 17:17:18,100 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 [2021-10-08 17:17:18,100 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)] === [2021-10-08 17:17:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:17:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1571603090, now seen corresponding path program 27 times [2021-10-08 17:17:18,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:17:18,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62682364] [2021-10-08 17:17:18,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:17:18,102 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:17:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:17:18,103 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) [2021-10-08 17:17:18,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-08 17:17:19,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-08 17:17:19,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:17:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:17:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:17:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:17:21,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:17:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:17:29,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:17:29,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62682364] [2021-10-08 17:17:29,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62682364] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:17:29,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:17:29,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-08 17:17:29,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089241253] [2021-10-08 17:17:29,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-08 17:17:29,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:17:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-08 17:17:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:17:29,500 INFO L87 Difference]: Start difference. First operand 15024 states and 54489 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:18:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:18:01,802 INFO L93 Difference]: Finished difference Result 15779 states and 56295 transitions. [2021-10-08 17:18:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-08 17:18:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:18:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:18:01,844 INFO L225 Difference]: With dead ends: 15779 [2021-10-08 17:18:01,844 INFO L226 Difference]: Without dead ends: 15774 [2021-10-08 17:18:01,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 33511.2ms TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-10-08 17:18:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15774 states. [2021-10-08 17:18:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15774 to 15124. [2021-10-08 17:18:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15124 states, 15123 states have (on average 3.6251405144481916) internal successors, (54823), 15123 states have internal predecessors, (54823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:18:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15124 states to 15124 states and 54823 transitions. [2021-10-08 17:18:02,361 INFO L78 Accepts]: Start accepts. Automaton has 15124 states and 54823 transitions. Word has length 21 [2021-10-08 17:18:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:18:02,361 INFO L470 AbstractCegarLoop]: Abstraction has 15124 states and 54823 transitions. [2021-10-08 17:18:02,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:18:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 15124 states and 54823 transitions. [2021-10-08 17:18:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:18:02,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:18:02,384 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:18:02,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-08 17:18:02,592 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 [2021-10-08 17:18:02,592 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)] === [2021-10-08 17:18:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:18:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1304332586, now seen corresponding path program 28 times [2021-10-08 17:18:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:18:02,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387119500] [2021-10-08 17:18:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:18:02,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:18:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:18:02,600 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) [2021-10-08 17:18:02,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-08 17:18:03,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:18:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:18:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:18:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:18:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:18:06,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:18:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:18:10,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:18:10,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387119500] [2021-10-08 17:18:10,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387119500] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:18:10,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:18:10,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-08 17:18:10,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979827718] [2021-10-08 17:18:10,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-08 17:18:10,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:18:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-08 17:18:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2021-10-08 17:18:10,118 INFO L87 Difference]: Start difference. First operand 15124 states and 54823 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 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) [2021-10-08 17:18:33,154 WARN L207 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-10-08 17:18:50,802 WARN L207 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-10-08 17:18:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:18:56,082 INFO L93 Difference]: Finished difference Result 16388 states and 58058 transitions. [2021-10-08 17:18:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-08 17:18:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 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 21 [2021-10-08 17:18:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:18:56,125 INFO L225 Difference]: With dead ends: 16388 [2021-10-08 17:18:56,125 INFO L226 Difference]: Without dead ends: 16388 [2021-10-08 17:18:56,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 45556.4ms TimeCoverageRelationStatistics Valid=1280, Invalid=4270, Unknown=0, NotChecked=0, Total=5550 [2021-10-08 17:18:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-10-08 17:18:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 15266. [2021-10-08 17:18:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15266 states, 15265 states have (on average 3.618932197838192) internal successors, (55243), 15265 states have internal predecessors, (55243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:18:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15266 states to 15266 states and 55243 transitions. [2021-10-08 17:18:56,588 INFO L78 Accepts]: Start accepts. Automaton has 15266 states and 55243 transitions. Word has length 21 [2021-10-08 17:18:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:18:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 15266 states and 55243 transitions. [2021-10-08 17:18:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 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) [2021-10-08 17:18:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15266 states and 55243 transitions. [2021-10-08 17:18:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:18:56,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:18:56,607 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:18:56,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-08 17:18:56,807 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 [2021-10-08 17:18:56,808 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)] === [2021-10-08 17:18:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:18:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 264025326, now seen corresponding path program 29 times [2021-10-08 17:18:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:18:56,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428885098] [2021-10-08 17:18:56,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:18:56,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:18:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:18:56,812 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) [2021-10-08 17:18:56,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-08 17:18:58,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 17:18:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:18:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:18:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:19:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:19:00,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:19:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:19:06,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:19:06,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428885098] [2021-10-08 17:19:06,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428885098] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:19:06,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:19:06,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:19:06,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797543081] [2021-10-08 17:19:06,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:19:06,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:19:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:19:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:19:06,071 INFO L87 Difference]: Start difference. First operand 15266 states and 55243 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:19:11,747 INFO L93 Difference]: Finished difference Result 20637 states and 73934 transitions. [2021-10-08 17:19:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-08 17:19:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:19:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:19:11,812 INFO L225 Difference]: With dead ends: 20637 [2021-10-08 17:19:11,813 INFO L226 Difference]: Without dead ends: 20616 [2021-10-08 17:19:11,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 6385.6ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-10-08 17:19:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20616 states. [2021-10-08 17:19:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20616 to 19916. [2021-10-08 17:19:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19916 states, 19915 states have (on average 3.6148631684659804) internal successors, (71990), 19915 states have internal predecessors, (71990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19916 states to 19916 states and 71990 transitions. [2021-10-08 17:19:12,379 INFO L78 Accepts]: Start accepts. Automaton has 19916 states and 71990 transitions. Word has length 21 [2021-10-08 17:19:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:19:12,379 INFO L470 AbstractCegarLoop]: Abstraction has 19916 states and 71990 transitions. [2021-10-08 17:19:12,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19916 states and 71990 transitions. [2021-10-08 17:19:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:19:12,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:19:12,404 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:19:12,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-08 17:19:12,605 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 [2021-10-08 17:19:12,605 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)] === [2021-10-08 17:19:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:19:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2144623088, now seen corresponding path program 30 times [2021-10-08 17:19:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:19:12,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501842394] [2021-10-08 17:19:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:19:12,608 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:19:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:19:12,609 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) [2021-10-08 17:19:12,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-08 17:19:14,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-08 17:19:14,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:19:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:19:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:19:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:19:16,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:19:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:19:21,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:19:21,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501842394] [2021-10-08 17:19:21,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501842394] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:19:21,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:19:21,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:19:21,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364205448] [2021-10-08 17:19:21,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:19:21,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:19:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:19:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:19:21,794 INFO L87 Difference]: Start difference. First operand 19916 states and 71990 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:19:24,992 INFO L93 Difference]: Finished difference Result 25417 states and 92363 transitions. [2021-10-08 17:19:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-08 17:19:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:19:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:19:25,065 INFO L225 Difference]: With dead ends: 25417 [2021-10-08 17:19:25,066 INFO L226 Difference]: Without dead ends: 25412 [2021-10-08 17:19:25,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3898.2ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-10-08 17:19:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25412 states. [2021-10-08 17:19:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25412 to 20560. [2021-10-08 17:19:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20560 states, 20559 states have (on average 3.6060119655625273) internal successors, (74136), 20559 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20560 states to 20560 states and 74136 transitions. [2021-10-08 17:19:25,778 INFO L78 Accepts]: Start accepts. Automaton has 20560 states and 74136 transitions. Word has length 21 [2021-10-08 17:19:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:19:25,778 INFO L470 AbstractCegarLoop]: Abstraction has 20560 states and 74136 transitions. [2021-10-08 17:19:25,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20560 states and 74136 transitions. [2021-10-08 17:19:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:19:25,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:19:25,807 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:19:25,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-08 17:19:26,020 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 [2021-10-08 17:19:26,021 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)] === [2021-10-08 17:19:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:19:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2092400136, now seen corresponding path program 31 times [2021-10-08 17:19:26,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:19:26,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858454886] [2021-10-08 17:19:26,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:19:26,025 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:19:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:19:26,026 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) [2021-10-08 17:19:26,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-08 17:19:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:19:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 17:19:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:19:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:19:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:19:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:19:34,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:19:34,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858454886] [2021-10-08 17:19:34,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858454886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:19:34,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:19:34,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:19:34,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901884960] [2021-10-08 17:19:34,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 17:19:34,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:19:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 17:19:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=336, Unknown=1, NotChecked=0, Total=462 [2021-10-08 17:19:34,599 INFO L87 Difference]: Start difference. First operand 20560 states and 74136 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:19:55,146 WARN L207 SmtUtils]: Spent 10.20 s on a formula simplification that was a NOOP. DAG size: 35 [2021-10-08 17:20:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:20:04,324 INFO L93 Difference]: Finished difference Result 26048 states and 92046 transitions. [2021-10-08 17:20:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-08 17:20:04,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:20:04,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:20:04,401 INFO L225 Difference]: With dead ends: 26048 [2021-10-08 17:20:04,401 INFO L226 Difference]: Without dead ends: 26048 [2021-10-08 17:20:04,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 30374.1ms TimeCoverageRelationStatistics Valid=1019, Invalid=3140, Unknown=1, NotChecked=0, Total=4160 [2021-10-08 17:20:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26048 states. [2021-10-08 17:20:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26048 to 22684. [2021-10-08 17:20:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22684 states, 22683 states have (on average 3.57307234492792) internal successors, (81048), 22683 states have internal predecessors, (81048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:20:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22684 states to 22684 states and 81048 transitions. [2021-10-08 17:20:05,140 INFO L78 Accepts]: Start accepts. Automaton has 22684 states and 81048 transitions. Word has length 21 [2021-10-08 17:20:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:20:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 22684 states and 81048 transitions. [2021-10-08 17:20:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:20:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 22684 states and 81048 transitions. [2021-10-08 17:20:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:20:05,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:20:05,179 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:20:05,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-08 17:20:05,392 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 [2021-10-08 17:20:05,393 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)] === [2021-10-08 17:20:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:20:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash -166366058, now seen corresponding path program 32 times [2021-10-08 17:20:05,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:20:05,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766401065] [2021-10-08 17:20:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:20:05,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:20:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:20:05,396 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) [2021-10-08 17:20:05,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-08 17:20:06,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:20:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:20:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:20:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:20:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:20:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:20:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:20:14,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:20:14,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766401065] [2021-10-08 17:20:14,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766401065] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:20:14,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:20:14,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:20:14,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319434034] [2021-10-08 17:20:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:20:14,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:20:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:20:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:20:14,524 INFO L87 Difference]: Start difference. First operand 22684 states and 81048 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:20:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:20:17,824 INFO L93 Difference]: Finished difference Result 29401 states and 105970 transitions. [2021-10-08 17:20:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-08 17:20:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:20:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:20:17,912 INFO L225 Difference]: With dead ends: 29401 [2021-10-08 17:20:17,912 INFO L226 Difference]: Without dead ends: 29396 [2021-10-08 17:20:17,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4303.7ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-10-08 17:20:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29396 states. [2021-10-08 17:20:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29396 to 25532. [2021-10-08 17:20:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25532 states, 25531 states have (on average 3.5958638517880224) internal successors, (91806), 25531 states have internal predecessors, (91806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:20:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25532 states to 25532 states and 91806 transitions. [2021-10-08 17:20:18,780 INFO L78 Accepts]: Start accepts. Automaton has 25532 states and 91806 transitions. Word has length 21 [2021-10-08 17:20:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:20:18,780 INFO L470 AbstractCegarLoop]: Abstraction has 25532 states and 91806 transitions. [2021-10-08 17:20:18,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:20:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 25532 states and 91806 transitions. [2021-10-08 17:20:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:20:18,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:20:18,810 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:20:18,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-08 17:20:19,011 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 [2021-10-08 17:20:19,011 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)] === [2021-10-08 17:20:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:20:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash 170287592, now seen corresponding path program 33 times [2021-10-08 17:20:19,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:20:19,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696576044] [2021-10-08 17:20:19,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:20:19,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:20:19,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:20:19,015 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) [2021-10-08 17:20:19,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-08 17:20:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-08 17:20:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:20:20,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:20:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:20:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:20:22,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:20:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:20:30,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:20:30,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696576044] [2021-10-08 17:20:30,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696576044] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:20:30,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:20:30,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-08 17:20:30,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664009454] [2021-10-08 17:20:30,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:20:30,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:20:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:20:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=350, Unknown=2, NotChecked=0, Total=506 [2021-10-08 17:20:30,942 INFO L87 Difference]: Start difference. First operand 25532 states and 91806 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:21:07,683 WARN L207 SmtUtils]: Spent 20.85 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-10-08 17:21:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:21:12,941 INFO L93 Difference]: Finished difference Result 28486 states and 102419 transitions. [2021-10-08 17:21:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-08 17:21:12,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:21:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:21:13,039 INFO L225 Difference]: With dead ends: 28486 [2021-10-08 17:21:13,039 INFO L226 Difference]: Without dead ends: 28428 [2021-10-08 17:21:13,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 43545.3ms TimeCoverageRelationStatistics Valid=987, Invalid=1981, Unknown=2, NotChecked=0, Total=2970 [2021-10-08 17:21:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28428 states. [2021-10-08 17:21:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28428 to 26700. [2021-10-08 17:21:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26700 states, 26699 states have (on average 3.599535563129705) internal successors, (96104), 26699 states have internal predecessors, (96104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:21:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26700 states to 26700 states and 96104 transitions. [2021-10-08 17:21:13,944 INFO L78 Accepts]: Start accepts. Automaton has 26700 states and 96104 transitions. Word has length 21 [2021-10-08 17:21:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:21:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 26700 states and 96104 transitions. [2021-10-08 17:21:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:21:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 26700 states and 96104 transitions. [2021-10-08 17:21:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:21:13,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:21:13,982 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:21:13,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-08 17:21:14,182 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 [2021-10-08 17:21:14,183 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)] === [2021-10-08 17:21:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:21:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 17813172, now seen corresponding path program 34 times [2021-10-08 17:21:14,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:21:14,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828040338] [2021-10-08 17:21:14,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:21:14,186 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:21:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:21:14,187 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) [2021-10-08 17:21:14,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-08 17:21:15,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:21:15,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:21:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:21:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:21:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:21:17,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:21:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:21:24,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:21:24,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828040338] [2021-10-08 17:21:24,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828040338] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:21:24,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:21:24,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-10-08 17:21:24,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156756162] [2021-10-08 17:21:24,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 17:21:24,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:21:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 17:21:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=396, Unknown=1, NotChecked=0, Total=552 [2021-10-08 17:21:24,195 INFO L87 Difference]: Start difference. First operand 26700 states and 96104 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) 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) [2021-10-08 17:21:45,381 WARN L207 SmtUtils]: Spent 20.98 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-10-08 17:22:25,690 WARN L207 SmtUtils]: Spent 38.00 s on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-10-08 17:22:58,287 WARN L207 SmtUtils]: Spent 31.40 s on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-10-08 17:23:33,509 WARN L207 SmtUtils]: Spent 31.80 s on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-10-08 17:24:15,534 WARN L207 SmtUtils]: Spent 31.75 s on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-10-08 17:24:37,475 WARN L207 SmtUtils]: Spent 21.29 s on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-10-08 17:24:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:24:37,754 INFO L93 Difference]: Finished difference Result 27674 states and 98586 transitions. [2021-10-08 17:24:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-08 17:24:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) 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 21 [2021-10-08 17:24:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:24:37,833 INFO L225 Difference]: With dead ends: 27674 [2021-10-08 17:24:37,833 INFO L226 Difference]: Without dead ends: 27674 [2021-10-08 17:24:37,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 195160.6ms TimeCoverageRelationStatistics Valid=705, Invalid=2050, Unknown=1, NotChecked=0, Total=2756 [2021-10-08 17:24:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27674 states. [2021-10-08 17:24:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27674 to 26788. [2021-10-08 17:24:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26788 states, 26787 states have (on average 3.5980886250793294) internal successors, (96382), 26787 states have internal predecessors, (96382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:24:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26788 states to 26788 states and 96382 transitions. [2021-10-08 17:24:38,772 INFO L78 Accepts]: Start accepts. Automaton has 26788 states and 96382 transitions. Word has length 21 [2021-10-08 17:24:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:24:38,772 INFO L470 AbstractCegarLoop]: Abstraction has 26788 states and 96382 transitions. [2021-10-08 17:24:38,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) 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) [2021-10-08 17:24:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26788 states and 96382 transitions. [2021-10-08 17:24:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:24:38,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:24:38,807 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:24:38,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-08 17:24:39,007 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 [2021-10-08 17:24:39,007 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)] === [2021-10-08 17:24:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:24:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 744081644, now seen corresponding path program 35 times [2021-10-08 17:24:39,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:24:39,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172958467] [2021-10-08 17:24:39,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:24:39,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:24:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:24:39,010 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) [2021-10-08 17:24:39,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-08 17:24:40,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-08 17:24:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:24:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:24:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:24:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:24:43,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:24:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:24:49,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:24:49,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172958467] [2021-10-08 17:24:49,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172958467] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:24:49,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:24:49,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:24:49,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783095393] [2021-10-08 17:24:49,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:24:49,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:24:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:24:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:24:49,076 INFO L87 Difference]: Start difference. First operand 26788 states and 96382 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:24:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:24:51,826 INFO L93 Difference]: Finished difference Result 35219 states and 127231 transitions. [2021-10-08 17:24:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-08 17:24:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:24:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:24:51,934 INFO L225 Difference]: With dead ends: 35219 [2021-10-08 17:24:51,935 INFO L226 Difference]: Without dead ends: 35212 [2021-10-08 17:24:51,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4000.7ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:24:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35212 states. [2021-10-08 17:24:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35212 to 34966. [2021-10-08 17:24:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34966 states, 34965 states have (on average 3.6224224224224226) internal successors, (126658), 34965 states have internal predecessors, (126658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:24:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34966 states to 34966 states and 126658 transitions. [2021-10-08 17:24:53,069 INFO L78 Accepts]: Start accepts. Automaton has 34966 states and 126658 transitions. Word has length 21 [2021-10-08 17:24:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:24:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 34966 states and 126658 transitions. [2021-10-08 17:24:53,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:24:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34966 states and 126658 transitions. [2021-10-08 17:24:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:24:53,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:24:53,376 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:24:53,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-08 17:24:53,577 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 [2021-10-08 17:24:53,578 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)] === [2021-10-08 17:24:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:24:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash -918735478, now seen corresponding path program 36 times [2021-10-08 17:24:53,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:24:53,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772317520] [2021-10-08 17:24:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:24:53,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:24:53,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:24:53,581 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) [2021-10-08 17:24:53,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-08 17:24:55,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 17:24:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:24:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:24:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:24:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:24:57,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:25:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:25:03,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:25:03,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772317520] [2021-10-08 17:25:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772317520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:25:03,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:25:03,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:25:03,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427809971] [2021-10-08 17:25:03,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:25:03,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:25:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:25:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:25:03,346 INFO L87 Difference]: Start difference. First operand 34966 states and 126658 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:25:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:25:09,417 INFO L93 Difference]: Finished difference Result 42131 states and 152665 transitions. [2021-10-08 17:25:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 17:25:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:25:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:25:09,784 INFO L225 Difference]: With dead ends: 42131 [2021-10-08 17:25:09,784 INFO L226 Difference]: Without dead ends: 42126 [2021-10-08 17:25:09,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6608.9ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-10-08 17:25:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42126 states. [2021-10-08 17:25:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42126 to 37320. [2021-10-08 17:25:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37320 states, 37319 states have (on average 3.6328143840938933) internal successors, (135573), 37319 states have internal predecessors, (135573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:25:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 135573 transitions. [2021-10-08 17:25:11,347 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 135573 transitions. Word has length 21 [2021-10-08 17:25:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:25:11,347 INFO L470 AbstractCegarLoop]: Abstraction has 37320 states and 135573 transitions. [2021-10-08 17:25:11,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:25:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 135573 transitions. [2021-10-08 17:25:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:25:11,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:25:11,405 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:25:11,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-08 17:25:11,605 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 [2021-10-08 17:25:11,606 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)] === [2021-10-08 17:25:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:25:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -415861238, now seen corresponding path program 37 times [2021-10-08 17:25:11,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:25:11,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212656180] [2021-10-08 17:25:11,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:25:11,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:25:11,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:25:11,610 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) [2021-10-08 17:25:11,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-08 17:25:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:25:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:25:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:25:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:25:15,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:25:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:25:19,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:25:19,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212656180] [2021-10-08 17:25:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212656180] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:25:19,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:25:19,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-10-08 17:25:19,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631043484] [2021-10-08 17:25:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-08 17:25:19,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:25:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-08 17:25:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-10-08 17:25:19,602 INFO L87 Difference]: Start difference. First operand 37320 states and 135573 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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) [2021-10-08 17:25:46,936 WARN L207 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-10-08 17:26:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:26:01,489 INFO L93 Difference]: Finished difference Result 38398 states and 138355 transitions. [2021-10-08 17:26:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-08 17:26:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 21 [2021-10-08 17:26:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:26:01,609 INFO L225 Difference]: With dead ends: 38398 [2021-10-08 17:26:01,610 INFO L226 Difference]: Without dead ends: 38398 [2021-10-08 17:26:01,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 35089.2ms TimeCoverageRelationStatistics Valid=850, Invalid=2230, Unknown=0, NotChecked=0, Total=3080 [2021-10-08 17:26:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38398 states. [2021-10-08 17:26:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38398 to 37500. [2021-10-08 17:26:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.6325502013387023) internal successors, (136217), 37499 states have internal predecessors, (136217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:26:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 136217 transitions. [2021-10-08 17:26:03,068 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 136217 transitions. Word has length 21 [2021-10-08 17:26:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:26:03,068 INFO L470 AbstractCegarLoop]: Abstraction has 37500 states and 136217 transitions. [2021-10-08 17:26:03,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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) [2021-10-08 17:26:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 136217 transitions. [2021-10-08 17:26:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:26:03,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:26:03,115 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:26:03,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-08 17:26:03,316 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 [2021-10-08 17:26:03,317 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)] === [2021-10-08 17:26:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:26:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1406325366, now seen corresponding path program 38 times [2021-10-08 17:26:03,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:26:03,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110921976] [2021-10-08 17:26:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:26:03,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:26:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:26:03,320 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) [2021-10-08 17:26:03,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-08 17:26:05,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:26:05,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:26:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:26:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:26:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:26:07,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:26:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:26:12,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:26:12,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110921976] [2021-10-08 17:26:12,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110921976] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:26:12,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:26:12,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:26:12,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628873002] [2021-10-08 17:26:12,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:26:12,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:26:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:26:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:26:12,396 INFO L87 Difference]: Start difference. First operand 37500 states and 136217 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:26:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:26:16,044 INFO L93 Difference]: Finished difference Result 53255 states and 195727 transitions. [2021-10-08 17:26:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-08 17:26:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 17:26:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:26:16,409 INFO L225 Difference]: With dead ends: 53255 [2021-10-08 17:26:16,409 INFO L226 Difference]: Without dead ends: 53246 [2021-10-08 17:26:16,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4210.0ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-10-08 17:26:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53246 states. [2021-10-08 17:26:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53246 to 51788. [2021-10-08 17:26:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51788 states, 51787 states have (on average 3.683955432830633) internal successors, (190781), 51787 states have internal predecessors, (190781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:26:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51788 states to 51788 states and 190781 transitions. [2021-10-08 17:26:18,840 INFO L78 Accepts]: Start accepts. Automaton has 51788 states and 190781 transitions. Word has length 21 [2021-10-08 17:26:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:26:18,841 INFO L470 AbstractCegarLoop]: Abstraction has 51788 states and 190781 transitions. [2021-10-08 17:26:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:26:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 51788 states and 190781 transitions. [2021-10-08 17:26:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 17:26:18,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:26:18,914 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:26:18,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-08 17:26:19,115 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 [2021-10-08 17:26:19,115 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)] === [2021-10-08 17:26:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:26:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -368206572, now seen corresponding path program 39 times [2021-10-08 17:26:19,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:26:19,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524490725] [2021-10-08 17:26:19,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:26:19,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:26:19,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:26:19,119 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) [2021-10-08 17:26:19,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-08 17:26:21,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:26:21,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:26:21,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:26:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:26:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-08 17:26:22,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:26:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-08 17:26:23,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:26:23,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524490725] [2021-10-08 17:26:23,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524490725] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:26:23,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:26:23,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:26:23,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105337374] [2021-10-08 17:26:23,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:26:23,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:26:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:26:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:26:23,481 INFO L87 Difference]: Start difference. First operand 51788 states and 190781 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-10-08 17:26:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:26:26,276 INFO L93 Difference]: Finished difference Result 52562 states and 192763 transitions. [2021-10-08 17:26:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:26:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 22 [2021-10-08 17:26:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:26:26,604 INFO L225 Difference]: With dead ends: 52562 [2021-10-08 17:26:26,604 INFO L226 Difference]: Without dead ends: 52562 [2021-10-08 17:26:26,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1928.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:26:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52562 states. [2021-10-08 17:26:28,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52562 to 51852. [2021-10-08 17:26:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51852 states, 51851 states have (on average 3.6835355152263216) internal successors, (190995), 51851 states have internal predecessors, (190995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:26:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51852 states to 51852 states and 190995 transitions. [2021-10-08 17:26:28,880 INFO L78 Accepts]: Start accepts. Automaton has 51852 states and 190995 transitions. Word has length 22 [2021-10-08 17:26:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:26:28,880 INFO L470 AbstractCegarLoop]: Abstraction has 51852 states and 190995 transitions. [2021-10-08 17:26:28,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-10-08 17:26:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 51852 states and 190995 transitions. [2021-10-08 17:26:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 17:26:28,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:26:28,986 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:26:29,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-08 17:26:29,186 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 [2021-10-08 17:26:29,189 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)] === [2021-10-08 17:26:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:26:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash -276079250, now seen corresponding path program 40 times [2021-10-08 17:26:29,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:26:29,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835464677] [2021-10-08 17:26:29,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:26:29,191 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:26:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:26:29,192 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) [2021-10-08 17:26:29,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-08 17:26:31,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:26:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:26:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 17:26:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:26:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:26:32,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:26:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:26:43,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:26:43,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835464677] [2021-10-08 17:26:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835464677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:26:43,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:26:43,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:26:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002446037] [2021-10-08 17:26:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 17:26:43,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:26:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 17:26:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=367, Unknown=4, NotChecked=0, Total=462 [2021-10-08 17:26:43,316 INFO L87 Difference]: Start difference. First operand 51852 states and 190995 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-08 17:27:01,340 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 17:27:01,341 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 [2021-10-08 17:27:01,821 WARN L223 SmtUtils]: Removed 5 from assertion stack [2021-10-08 17:27:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:27:01,823 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:27:01,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:02,024 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 [2021-10-08 17:27:02,024 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 17:27:02,028 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 17:27:02,029 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:27:02,029 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 17:27:02,029 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 17:27:02,033 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 17:27:02,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 17:27:02,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 05:27:02 BasicIcfg [2021-10-08 17:27:02,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 17:27:02,035 INFO L168 Benchmark]: Toolchain (without parser) took 826518.39 ms. Allocated memory was 151.0 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 127.0 MB in the beginning and 2.3 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,036 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 17:27:02,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.68 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 115.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.05 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,037 INFO L168 Benchmark]: Boogie Preprocessor took 75.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,037 INFO L168 Benchmark]: RCFGBuilder took 703.88 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 97.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,038 INFO L168 Benchmark]: TraceAbstraction took 825293.40 ms. Allocated memory was 151.0 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 97.3 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-08 17:27:02,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.68 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 115.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 80.05 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 703.88 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 97.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 825293.40 ms. Allocated memory was 151.0 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 97.3 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8931.1ms, 107 PlacesBefore, 30 PlacesAfterwards, 108 TransitionsBefore, 25 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 8 FixpointIterations, 68 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 120 TotalNumberOfCompositions, 1109 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1109, positive: 1109, positive conditional: 0, positive unconditional: 1109, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 665, positive: 665, positive conditional: 0, positive unconditional: 665, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 665, positive: 648, positive conditional: 0, positive unconditional: 648, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 17, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 242, positive: 242, positive conditional: 0, positive unconditional: 242, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1109, positive: 444, positive conditional: 0, positive unconditional: 444, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 665, unknown conditional: 0, unknown unconditional: 665] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, 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: 97]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 92]: 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 (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - TimeoutResultAtElement [Line: 91]: 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 (51852states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 43 for 18175ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 125 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 825067.1ms, OverallIterations: 49, TraceHistogramMax: 9, EmptinessCheckTime: 1128.2ms, AutomataDifference: 545191.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9000.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1262 SDtfs, 5280 SDslu, 8650 SDs, 0 SdLazy, 11733 SolverSat, 2628 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 58767.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 1142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 544584.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51852occurred in iteration=48, InterpolantAutomatonStates: 1103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18476.2ms AutomataMinimizationTime, 48 MinimizatonAttempts, 39416 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 427.3ms SsaConstructionTime, 5515.1ms SatisfiabilityAnalysisTime, 203003.2ms InterpolantComputationTime, 807 NumberOfCodeBlocks, 804 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1516 ConstructedInterpolants, 128 QuantifiedInterpolants, 38228 SizeOfPredicates, 590 NumberOfNonLiveVariables, 3136 ConjunctsInSsa, 530 ConjunctsInUnsatCore, 98 InterpolantComputations, 14 PerfectInterpolantSequences, 285/1664 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