/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/bench-exp2x9.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 19:50:05,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:50:05,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:50:05,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:50:05,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:50:05,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:50:05,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:50:05,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:50:05,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:50:05,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:50:05,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:50:05,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:50:05,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:50:05,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:50:05,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:50:05,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:50:05,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:50:05,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:50:05,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:50:05,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:50:05,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 19:50:05,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:50:05,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:50:05,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:50:05,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:50:05,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:50:05,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:50:05,619 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:50:05,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:50:05,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:50:05,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:50:05,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:50:05,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:50:05,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:50:05,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 19:50:05,622 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 19:50:05,622 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 19:50:05,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:50:05,623 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 19:50:05,623 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 19:50:05,623 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 19:50:05,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:50:05,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:50:05,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:50:05,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:50:05,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:50:05,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:05,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:50:05,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:50:05,625 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 19:50:05,625 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 19:50:05,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:50:05,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 19:50:05,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:50:06,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:50:06,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:50:06,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:50:06,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:50:06,144 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:50:06,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-10-13 19:50:06,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea4145d0c/dc2b92dc4d1045f39b051434a8e667b9/FLAG4ada739e4 [2021-10-13 19:50:07,025 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:50:07,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-10-13 19:50:07,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea4145d0c/dc2b92dc4d1045f39b051434a8e667b9/FLAG4ada739e4 [2021-10-13 19:50:07,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea4145d0c/dc2b92dc4d1045f39b051434a8e667b9 [2021-10-13 19:50:07,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:50:07,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 19:50:07,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:50:07,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:50:07,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1224ded8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07, skipping insertion in model container [2021-10-13 19:50:07,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:50:07,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:50:07,598 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/bench-exp2x9.wvr.c[2669,2682] [2021-10-13 19:50:07,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,618 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:50:07,661 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/bench-exp2x9.wvr.c[2669,2682] [2021-10-13 19:50:07,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,694 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:50:07,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07 WrapperNode [2021-10-13 19:50:07,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:50:07,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:50:07,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:50:07,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:50:07,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:50:07,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:50:07,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:50:07,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:50:07,835 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) [2021-10-13 19:50:07,863 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 [2021-10-13 19:50:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:50:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:50:07,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:50:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:50:07,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 19:50:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 19:50:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 19:50:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-13 19:50:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-13 19:50:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:50:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 19:50:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:50:07,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:50:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:50:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 19:50:07,914 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 19:50:08,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:50:08,680 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-13 19:50:08,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:08 BoogieIcfgContainer [2021-10-13 19:50:08,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:50:08,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:50:08,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:50:08,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:50:08,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:07" (1/3) ... [2021-10-13 19:50:08,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60037834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:08, skipping insertion in model container [2021-10-13 19:50:08,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (2/3) ... [2021-10-13 19:50:08,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60037834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:08, skipping insertion in model container [2021-10-13 19:50:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:08" (3/3) ... [2021-10-13 19:50:08,699 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2021-10-13 19:50:08,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:50:08,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 19:50:08,706 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:50:08,785 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,785 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,785 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,786 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,789 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,789 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,790 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,790 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,790 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,790 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,794 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,794 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,795 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,795 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,804 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,804 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,816 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,816 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,822 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,823 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,826 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,826 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,847 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-13 19:50:08,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:50:08,934 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 [2021-10-13 19:50:08,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-13 19:50:08,974 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:50:08,987 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 161 transitions, 354 flow [2021-10-13 19:50:08,991 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 161 transitions, 354 flow [2021-10-13 19:50:08,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 161 transitions, 354 flow [2021-10-13 19:50:09,149 INFO L129 PetriNetUnfolder]: 10/157 cut-off events. [2021-10-13 19:50:09,149 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-13 19:50:09,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 157 events. 10/157 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2021-10-13 19:50:09,165 INFO L116 LiptonReduction]: Number of co-enabled transitions 4080 [2021-10-13 19:50:27,069 INFO L131 LiptonReduction]: Checked pairs total: 4077 [2021-10-13 19:50:27,070 INFO L133 LiptonReduction]: Total number of compositions: 156 [2021-10-13 19:50:27,080 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2021-10-13 19:50:27,111 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-13 19:50:27,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:27,122 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-13 19:50:27,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash 601, now seen corresponding path program 1 times [2021-10-13 19:50:27,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:27,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242712512] [2021-10-13 19:50:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:27,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:27,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:27,149 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) [2021-10-13 19:50:27,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 19:50:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:27,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 19:50:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:27,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:27,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:27,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242712512] [2021-10-13 19:50:27,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242712512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:27,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:27,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-13 19:50:27,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943257978] [2021-10-13 19:50:27,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 19:50:27,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 19:50:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 19:50:27,247 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-10-13 19:50:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:27,277 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2021-10-13 19:50:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 19:50:27,279 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 [2021-10-13 19:50:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:27,300 INFO L225 Difference]: With dead ends: 180 [2021-10-13 19:50:27,300 INFO L226 Difference]: Without dead ends: 180 [2021-10-13 19:50:27,302 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 [2021-10-13 19:50:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-13 19:50:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-10-13 19:50:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2021-10-13 19:50:27,369 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2021-10-13 19:50:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:27,370 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2021-10-13 19:50:27,370 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) [2021-10-13 19:50:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2021-10-13 19:50:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:27,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:27,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:27,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 19:50:27,584 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 [2021-10-13 19:50:27,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash 589823, now seen corresponding path program 1 times [2021-10-13 19:50:27,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:27,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993148943] [2021-10-13 19:50:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:27,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:27,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:27,598 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) [2021-10-13 19:50:27,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 19:50:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:50:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:28,161 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 19:50:28,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 75 [2021-10-13 19:50:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2021-10-13 19:50:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:28,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:28,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993148943] [2021-10-13 19:50:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993148943] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:28,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:28,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:28,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308776331] [2021-10-13 19:50:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:28,543 INFO L87 Difference]: Start difference. First operand 180 states and 692 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) [2021-10-13 19:50:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:28,624 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2021-10-13 19:50:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:28,626 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 [2021-10-13 19:50:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:28,629 INFO L225 Difference]: With dead ends: 170 [2021-10-13 19:50:28,630 INFO L226 Difference]: Without dead ends: 170 [2021-10-13 19:50:28,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-13 19:50:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-13 19:50:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2021-10-13 19:50:28,647 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2021-10-13 19:50:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:28,648 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2021-10-13 19:50:28,648 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) [2021-10-13 19:50:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2021-10-13 19:50:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:28,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:28,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:28,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:28,866 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 [2021-10-13 19:50:28,867 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash 589822, now seen corresponding path program 1 times [2021-10-13 19:50:28,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:28,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354511200] [2021-10-13 19:50:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:28,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:28,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:28,873 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) [2021-10-13 19:50:28,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 19:50:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:50:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:29,007 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 19:50:29,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-13 19:50:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:29,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:29,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:29,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354511200] [2021-10-13 19:50:29,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354511200] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:29,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:29,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:29,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121327179] [2021-10-13 19:50:29,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:29,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:29,180 INFO L87 Difference]: Start difference. First operand 170 states and 656 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) [2021-10-13 19:50:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:29,239 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2021-10-13 19:50:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:29,240 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 [2021-10-13 19:50:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:29,243 INFO L225 Difference]: With dead ends: 160 [2021-10-13 19:50:29,243 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 19:50:29,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 19:50:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-13 19:50:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2021-10-13 19:50:29,257 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2021-10-13 19:50:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:29,257 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2021-10-13 19:50:29,257 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) [2021-10-13 19:50:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2021-10-13 19:50:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:50:29,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:29,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:50:29,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:29,471 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 [2021-10-13 19:50:29,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash 566833960, now seen corresponding path program 1 times [2021-10-13 19:50:29,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:29,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570794182] [2021-10-13 19:50:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:29,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:29,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:29,476 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) [2021-10-13 19:50:29,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 19:50:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:50:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:29,828 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 19:50:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-13 19:50:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:29,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:30,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:30,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570794182] [2021-10-13 19:50:30,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570794182] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:30,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:30,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:30,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718627428] [2021-10-13 19:50:30,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:30,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:30,038 INFO L87 Difference]: Start difference. First operand 160 states and 620 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) [2021-10-13 19:50:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:30,097 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2021-10-13 19:50:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:30,098 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 [2021-10-13 19:50:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:30,100 INFO L225 Difference]: With dead ends: 152 [2021-10-13 19:50:30,101 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 19:50:30,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 19:50:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-13 19:50:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2021-10-13 19:50:30,112 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2021-10-13 19:50:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:30,112 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2021-10-13 19:50:30,112 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) [2021-10-13 19:50:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2021-10-13 19:50:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:50:30,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:30,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:50:30,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:30,325 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 [2021-10-13 19:50:30,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 566833961, now seen corresponding path program 1 times [2021-10-13 19:50:30,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:30,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956391320] [2021-10-13 19:50:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:30,329 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:30,330 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) [2021-10-13 19:50:30,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 19:50:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 19:50:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:30,449 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 19:50:30,450 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 19:50:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:30,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:30,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:30,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956391320] [2021-10-13 19:50:30,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956391320] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:30,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:30,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 19:50:30,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618027131] [2021-10-13 19:50:30,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:50:30,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:50:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:30,508 INFO L87 Difference]: Start difference. First operand 152 states and 596 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) [2021-10-13 19:50:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:30,555 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2021-10-13 19:50:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:30,556 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 [2021-10-13 19:50:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:30,558 INFO L225 Difference]: With dead ends: 144 [2021-10-13 19:50:30,559 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 19:50:30,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 19:50:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-13 19:50:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2021-10-13 19:50:30,567 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2021-10-13 19:50:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:30,568 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2021-10-13 19:50:30,568 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) [2021-10-13 19:50:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2021-10-13 19:50:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:50:30,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:30,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:30,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:30,784 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 [2021-10-13 19:50:30,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash -733398721, now seen corresponding path program 1 times [2021-10-13 19:50:30,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:30,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919463448] [2021-10-13 19:50:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:30,787 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:30,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:30,788 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) [2021-10-13 19:50:30,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 19:50:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:50:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:31,120 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 19:50:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-13 19:50:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:31,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:31,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:31,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919463448] [2021-10-13 19:50:31,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919463448] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:31,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:31,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:31,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612782964] [2021-10-13 19:50:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:31,398 INFO L87 Difference]: Start difference. First operand 144 states and 572 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:31,441 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2021-10-13 19:50:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:50:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:31,443 INFO L225 Difference]: With dead ends: 134 [2021-10-13 19:50:31,444 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 19:50:31,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 19:50:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-13 19:50:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2021-10-13 19:50:31,452 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2021-10-13 19:50:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:31,452 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2021-10-13 19:50:31,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2021-10-13 19:50:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:50:31,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:31,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:31,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:31,667 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 [2021-10-13 19:50:31,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash -733398720, now seen corresponding path program 1 times [2021-10-13 19:50:31,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:31,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912794020] [2021-10-13 19:50:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:31,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:31,682 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) [2021-10-13 19:50:31,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 19:50:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 19:50:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:31,823 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 19:50:31,824 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 19:50:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:31,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:31,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912794020] [2021-10-13 19:50:31,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912794020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:31,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:31,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 19:50:31,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698380544] [2021-10-13 19:50:31,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:50:31,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:50:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:31,897 INFO L87 Difference]: Start difference. First operand 134 states and 536 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:31,928 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2021-10-13 19:50:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:50:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:31,931 INFO L225 Difference]: With dead ends: 124 [2021-10-13 19:50:31,931 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 19:50:31,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 19:50:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-13 19:50:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2021-10-13 19:50:31,939 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2021-10-13 19:50:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:31,939 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2021-10-13 19:50:31,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2021-10-13 19:50:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:50:31,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:31,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:31,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:32,156 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 [2021-10-13 19:50:32,156 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -421519305, now seen corresponding path program 1 times [2021-10-13 19:50:32,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:32,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243239585] [2021-10-13 19:50:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:32,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:32,160 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) [2021-10-13 19:50:32,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 19:50:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:50:32,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:32,508 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 19:50:32,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 69 [2021-10-13 19:50:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2021-10-13 19:50:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:32,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:33,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:33,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243239585] [2021-10-13 19:50:33,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243239585] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:33,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:33,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 19:50:33,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989720027] [2021-10-13 19:50:33,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:33,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:33,114 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:33,167 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2021-10-13 19:50:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:50:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:33,169 INFO L225 Difference]: With dead ends: 108 [2021-10-13 19:50:33,169 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 19:50:33,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 19:50:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 19:50:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2021-10-13 19:50:33,176 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2021-10-13 19:50:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:33,176 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2021-10-13 19:50:33,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2021-10-13 19:50:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:50:33,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:33,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:33,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:33,390 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 [2021-10-13 19:50:33,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash -421519304, now seen corresponding path program 1 times [2021-10-13 19:50:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:33,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105013931] [2021-10-13 19:50:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:33,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:33,395 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) [2021-10-13 19:50:33,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 19:50:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:50:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:33,576 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 19:50:33,576 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 19:50:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:33,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:33,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105013931] [2021-10-13 19:50:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105013931] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:50:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323425463] [2021-10-13 19:50:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 19:50:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 19:50:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:33,774 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:33,824 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2021-10-13 19:50:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:50:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:33,827 INFO L225 Difference]: With dead ends: 92 [2021-10-13 19:50:33,827 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 19:50:33,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 19:50:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-13 19:50:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2021-10-13 19:50:33,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2021-10-13 19:50:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:33,833 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2021-10-13 19:50:33,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2021-10-13 19:50:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:50:33,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:33,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:33,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:34,047 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 [2021-10-13 19:50:34,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1399456573, now seen corresponding path program 1 times [2021-10-13 19:50:34,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:34,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575094128] [2021-10-13 19:50:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:34,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:34,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:34,052 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) [2021-10-13 19:50:34,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 19:50:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:34,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:50:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:34,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:34,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:34,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575094128] [2021-10-13 19:50:34,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575094128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:34,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:34,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:34,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560207591] [2021-10-13 19:50:34,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:34,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:34,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:34,684 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-10-13 19:50:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:34,722 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2021-10-13 19:50:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:34,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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 [2021-10-13 19:50:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:34,726 INFO L225 Difference]: With dead ends: 181 [2021-10-13 19:50:34,726 INFO L226 Difference]: Without dead ends: 172 [2021-10-13 19:50:34,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-13 19:50:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-10-13 19:50:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2021-10-13 19:50:34,738 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2021-10-13 19:50:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:34,739 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2021-10-13 19:50:34,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-10-13 19:50:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2021-10-13 19:50:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:34,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:34,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:34,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:34,957 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 [2021-10-13 19:50:34,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:34,958 INFO L82 PathProgramCache]: Analyzing trace with hash 74808037, now seen corresponding path program 1 times [2021-10-13 19:50:34,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:34,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594447080] [2021-10-13 19:50:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:34,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:34,961 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) [2021-10-13 19:50:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 19:50:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:35,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:35,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594447080] [2021-10-13 19:50:35,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594447080] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:35,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:35,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-13 19:50:35,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015028331] [2021-10-13 19:50:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:35,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:35,310 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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) [2021-10-13 19:50:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:35,454 INFO L93 Difference]: Finished difference Result 336 states and 1257 transitions. [2021-10-13 19:50:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:50:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 22 [2021-10-13 19:50:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:35,464 INFO L225 Difference]: With dead ends: 336 [2021-10-13 19:50:35,466 INFO L226 Difference]: Without dead ends: 336 [2021-10-13 19:50:35,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-13 19:50:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 210. [2021-10-13 19:50:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 4.009569377990431) internal successors, (838), 209 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 838 transitions. [2021-10-13 19:50:35,489 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 838 transitions. Word has length 22 [2021-10-13 19:50:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 838 transitions. [2021-10-13 19:50:35,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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) [2021-10-13 19:50:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 838 transitions. [2021-10-13 19:50:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:35,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:35,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:35,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:35,707 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 [2021-10-13 19:50:35,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1889579684, now seen corresponding path program 1 times [2021-10-13 19:50:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:35,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443095615] [2021-10-13 19:50:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:35,709 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:35,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:35,710 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) [2021-10-13 19:50:35,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 19:50:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:50:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:35,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:36,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:36,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443095615] [2021-10-13 19:50:36,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443095615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:36,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:36,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:50:36,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817513266] [2021-10-13 19:50:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:36,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:36,083 INFO L87 Difference]: Start difference. First operand 210 states and 838 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:36,258 INFO L93 Difference]: Finished difference Result 370 states and 1364 transitions. [2021-10-13 19:50:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:50:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 19:50:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:36,264 INFO L225 Difference]: With dead ends: 370 [2021-10-13 19:50:36,264 INFO L226 Difference]: Without dead ends: 354 [2021-10-13 19:50:36,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-13 19:50:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 268. [2021-10-13 19:50:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 4.037453183520599) internal successors, (1078), 267 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 1078 transitions. [2021-10-13 19:50:36,281 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 1078 transitions. Word has length 22 [2021-10-13 19:50:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:36,282 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 1078 transitions. [2021-10-13 19:50:36,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 1078 transitions. [2021-10-13 19:50:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:36,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:36,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:36,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:36,492 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 [2021-10-13 19:50:36,492 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 872928158, now seen corresponding path program 2 times [2021-10-13 19:50:36,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:36,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322119329] [2021-10-13 19:50:36,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:50:36,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:36,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:36,496 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) [2021-10-13 19:50:36,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 19:50:36,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:50:36,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:36,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:36,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322119329] [2021-10-13 19:50:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322119329] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:36,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:36,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:50:36,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842131210] [2021-10-13 19:50:36,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:36,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:36,915 INFO L87 Difference]: Start difference. First operand 268 states and 1078 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:37,046 INFO L93 Difference]: Finished difference Result 332 states and 1304 transitions. [2021-10-13 19:50:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:50:37,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 19:50:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:37,052 INFO L225 Difference]: With dead ends: 332 [2021-10-13 19:50:37,052 INFO L226 Difference]: Without dead ends: 332 [2021-10-13 19:50:37,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-13 19:50:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 310. [2021-10-13 19:50:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 4.077669902912621) internal successors, (1260), 309 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1260 transitions. [2021-10-13 19:50:37,068 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1260 transitions. Word has length 22 [2021-10-13 19:50:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:37,068 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1260 transitions. [2021-10-13 19:50:37,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1260 transitions. [2021-10-13 19:50:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:37,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:37,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:37,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:37,282 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 [2021-10-13 19:50:37,283 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash 17621504, now seen corresponding path program 1 times [2021-10-13 19:50:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:37,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757408049] [2021-10-13 19:50:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:37,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:37,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:37,287 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) [2021-10-13 19:50:37,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 19:50:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:37,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:37,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757408049] [2021-10-13 19:50:37,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757408049] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:37,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:37,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-13 19:50:37,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233730724] [2021-10-13 19:50:37,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:37,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:37,701 INFO L87 Difference]: Start difference. First operand 310 states and 1260 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-10-13 19:50:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:37,862 INFO L93 Difference]: Finished difference Result 372 states and 1482 transitions. [2021-10-13 19:50:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:50:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 19:50:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:37,867 INFO L225 Difference]: With dead ends: 372 [2021-10-13 19:50:37,867 INFO L226 Difference]: Without dead ends: 372 [2021-10-13 19:50:37,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-10-13 19:50:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 350. [2021-10-13 19:50:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 4.1203438395415475) internal successors, (1438), 349 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1438 transitions. [2021-10-13 19:50:37,884 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1438 transitions. Word has length 22 [2021-10-13 19:50:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:37,884 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1438 transitions. [2021-10-13 19:50:37,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-10-13 19:50:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1438 transitions. [2021-10-13 19:50:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:37,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:37,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:37,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:38,100 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 [2021-10-13 19:50:38,100 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1631754596, now seen corresponding path program 1 times [2021-10-13 19:50:38,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:38,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752675514] [2021-10-13 19:50:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:38,103 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:38,104 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) [2021-10-13 19:50:38,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 19:50:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:38,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:38,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:38,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752675514] [2021-10-13 19:50:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752675514] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:38,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:38,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:50:38,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434760739] [2021-10-13 19:50:38,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:38,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:38,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:38,462 INFO L87 Difference]: Start difference. First operand 350 states and 1438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-10-13 19:50:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:38,649 INFO L93 Difference]: Finished difference Result 614 states and 2247 transitions. [2021-10-13 19:50:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:50:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 22 [2021-10-13 19:50:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:38,656 INFO L225 Difference]: With dead ends: 614 [2021-10-13 19:50:38,656 INFO L226 Difference]: Without dead ends: 592 [2021-10-13 19:50:38,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-10-13 19:50:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 392. [2021-10-13 19:50:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.9872122762148337) internal successors, (1559), 391 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1559 transitions. [2021-10-13 19:50:38,681 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1559 transitions. Word has length 22 [2021-10-13 19:50:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:38,681 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1559 transitions. [2021-10-13 19:50:38,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-10-13 19:50:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1559 transitions. [2021-10-13 19:50:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 19:50:38,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:38,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:38,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 19:50:38,896 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 [2021-10-13 19:50:38,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1378558274, now seen corresponding path program 2 times [2021-10-13 19:50:38,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:38,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043750584] [2021-10-13 19:50:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:50:38,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:38,901 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) [2021-10-13 19:50:38,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 19:50:39,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:50:39,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:39,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:39,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:39,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043750584] [2021-10-13 19:50:39,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043750584] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:39,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:39,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:50:39,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137568059] [2021-10-13 19:50:39,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:39,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:39,298 INFO L87 Difference]: Start difference. First operand 392 states and 1559 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-10-13 19:50:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:39,462 INFO L93 Difference]: Finished difference Result 538 states and 2079 transitions. [2021-10-13 19:50:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:50:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 22 [2021-10-13 19:50:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:39,470 INFO L225 Difference]: With dead ends: 538 [2021-10-13 19:50:39,471 INFO L226 Difference]: Without dead ends: 538 [2021-10-13 19:50:39,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:50:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-13 19:50:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 478. [2021-10-13 19:50:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 4.027253668763103) internal successors, (1921), 477 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1921 transitions. [2021-10-13 19:50:39,502 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1921 transitions. Word has length 22 [2021-10-13 19:50:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:39,503 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1921 transitions. [2021-10-13 19:50:39,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-10-13 19:50:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1921 transitions. [2021-10-13 19:50:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 19:50:39,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:39,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:39,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:39,714 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 [2021-10-13 19:50:39,715 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash 89317250, now seen corresponding path program 1 times [2021-10-13 19:50:39,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:39,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766323066] [2021-10-13 19:50:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:39,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:39,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:39,718 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) [2021-10-13 19:50:39,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 19:50:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:40,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:40,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:40,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766323066] [2021-10-13 19:50:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766323066] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:40,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:40,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:50:40,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588771355] [2021-10-13 19:50:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:50:40,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:50:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:40,746 INFO L87 Difference]: Start difference. First operand 478 states and 1921 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:40,950 INFO L93 Difference]: Finished difference Result 762 states and 2927 transitions. [2021-10-13 19:50:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:50:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 19:50:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:40,959 INFO L225 Difference]: With dead ends: 762 [2021-10-13 19:50:40,959 INFO L226 Difference]: Without dead ends: 712 [2021-10-13 19:50:40,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-10-13 19:50:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 562. [2021-10-13 19:50:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 4.133689839572193) internal successors, (2319), 561 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 2319 transitions. [2021-10-13 19:50:41,012 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 2319 transitions. Word has length 23 [2021-10-13 19:50:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:41,012 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 2319 transitions. [2021-10-13 19:50:41,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 2319 transitions. [2021-10-13 19:50:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 19:50:41,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:41,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:41,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 19:50:41,228 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 [2021-10-13 19:50:41,228 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1986642481, now seen corresponding path program 1 times [2021-10-13 19:50:41,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:41,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288539652] [2021-10-13 19:50:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:41,231 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:41,232 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) [2021-10-13 19:50:41,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 19:50:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:41,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:42,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:42,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288539652] [2021-10-13 19:50:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288539652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:42,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:42,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:50:42,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378839064] [2021-10-13 19:50:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:50:42,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:50:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:42,126 INFO L87 Difference]: Start difference. First operand 562 states and 2319 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:42,325 INFO L93 Difference]: Finished difference Result 802 states and 3158 transitions. [2021-10-13 19:50:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:50:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 19:50:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:42,334 INFO L225 Difference]: With dead ends: 802 [2021-10-13 19:50:42,334 INFO L226 Difference]: Without dead ends: 772 [2021-10-13 19:50:42,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-10-13 19:50:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 668. [2021-10-13 19:50:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 4.130434782608695) internal successors, (2755), 667 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2755 transitions. [2021-10-13 19:50:42,365 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2755 transitions. Word has length 23 [2021-10-13 19:50:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2755 transitions. [2021-10-13 19:50:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2755 transitions. [2021-10-13 19:50:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 19:50:42,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:42,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:42,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:42,583 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 [2021-10-13 19:50:42,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1591227151, now seen corresponding path program 2 times [2021-10-13 19:50:42,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:42,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432828708] [2021-10-13 19:50:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:50:42,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:42,587 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) [2021-10-13 19:50:42,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 19:50:42,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:50:42,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:43,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:43,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:43,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432828708] [2021-10-13 19:50:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432828708] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:43,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:43,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:50:43,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636518067] [2021-10-13 19:50:43,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:50:43,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:43,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:50:43,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:43,521 INFO L87 Difference]: Start difference. First operand 668 states and 2755 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:43,805 INFO L93 Difference]: Finished difference Result 880 states and 3511 transitions. [2021-10-13 19:50:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:50:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 19:50:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:43,814 INFO L225 Difference]: With dead ends: 880 [2021-10-13 19:50:43,814 INFO L226 Difference]: Without dead ends: 850 [2021-10-13 19:50:43,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-10-13 19:50:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 738. [2021-10-13 19:50:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 4.166892808683853) internal successors, (3071), 737 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 3071 transitions. [2021-10-13 19:50:43,849 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 3071 transitions. Word has length 23 [2021-10-13 19:50:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:43,850 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 3071 transitions. [2021-10-13 19:50:43,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 3071 transitions. [2021-10-13 19:50:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 19:50:43,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:43,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:43,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 19:50:44,066 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 [2021-10-13 19:50:44,067 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash 293922374, now seen corresponding path program 2 times [2021-10-13 19:50:44,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:44,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936393737] [2021-10-13 19:50:44,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:50:44,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:44,071 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) [2021-10-13 19:50:44,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 19:50:44,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:50:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:44,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:45,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:45,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936393737] [2021-10-13 19:50:45,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936393737] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:45,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:45,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:50:45,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918573251] [2021-10-13 19:50:45,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:50:45,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:50:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:45,130 INFO L87 Difference]: Start difference. First operand 738 states and 3071 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:45,354 INFO L93 Difference]: Finished difference Result 1034 states and 4113 transitions. [2021-10-13 19:50:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:50:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 19:50:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:45,365 INFO L225 Difference]: With dead ends: 1034 [2021-10-13 19:50:45,365 INFO L226 Difference]: Without dead ends: 984 [2021-10-13 19:50:45,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:50:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-10-13 19:50:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 828. [2021-10-13 19:50:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 4.194679564691657) internal successors, (3469), 827 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 3469 transitions. [2021-10-13 19:50:45,420 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 3469 transitions. Word has length 23 [2021-10-13 19:50:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:45,420 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 3469 transitions. [2021-10-13 19:50:45,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 3469 transitions. [2021-10-13 19:50:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:45,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:45,425 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:45,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 19:50:45,638 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 [2021-10-13 19:50:45,639 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:45,640 INFO L82 PathProgramCache]: Analyzing trace with hash -481600220, now seen corresponding path program 3 times [2021-10-13 19:50:45,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:45,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404872608] [2021-10-13 19:50:45,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:50:45,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:45,643 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) [2021-10-13 19:50:45,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 19:50:45,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:50:45,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:50:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:46,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:46,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404872608] [2021-10-13 19:50:46,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404872608] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:46,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:46,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:46,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425067080] [2021-10-13 19:50:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:46,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:46,258 INFO L87 Difference]: Start difference. First operand 828 states and 3469 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:47,215 INFO L93 Difference]: Finished difference Result 1748 states and 6963 transitions. [2021-10-13 19:50:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:50:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:50:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:47,236 INFO L225 Difference]: With dead ends: 1748 [2021-10-13 19:50:47,236 INFO L226 Difference]: Without dead ends: 1748 [2021-10-13 19:50:47,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:50:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-10-13 19:50:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1028. [2021-10-13 19:50:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 4.446932814021421) internal successors, (4567), 1027 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 4567 transitions. [2021-10-13 19:50:47,298 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 4567 transitions. Word has length 24 [2021-10-13 19:50:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:47,299 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 4567 transitions. [2021-10-13 19:50:47,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 4567 transitions. [2021-10-13 19:50:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:47,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:47,305 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:47,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:47,519 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 [2021-10-13 19:50:47,520 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 539102853, now seen corresponding path program 4 times [2021-10-13 19:50:47,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:47,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798174356] [2021-10-13 19:50:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:50:47,522 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:47,524 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) [2021-10-13 19:50:47,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 19:50:47,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:50:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:50:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:47,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:48,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:48,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798174356] [2021-10-13 19:50:48,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798174356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:48,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:48,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:48,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490021617] [2021-10-13 19:50:48,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:48,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:48,101 INFO L87 Difference]: Start difference. First operand 1028 states and 4567 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:53,319 INFO L93 Difference]: Finished difference Result 1740 states and 6789 transitions. [2021-10-13 19:50:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:50:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:50:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:53,335 INFO L225 Difference]: With dead ends: 1740 [2021-10-13 19:50:53,335 INFO L226 Difference]: Without dead ends: 1716 [2021-10-13 19:50:53,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:50:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-10-13 19:50:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1086. [2021-10-13 19:50:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 4.395391705069124) internal successors, (4769), 1085 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4769 transitions. [2021-10-13 19:50:53,389 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4769 transitions. Word has length 24 [2021-10-13 19:50:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 4769 transitions. [2021-10-13 19:50:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4769 transitions. [2021-10-13 19:50:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:53,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:53,395 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:53,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:53,608 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 [2021-10-13 19:50:53,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash -276995096, now seen corresponding path program 5 times [2021-10-13 19:50:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:53,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286764988] [2021-10-13 19:50:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:50:53,610 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:53,611 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) [2021-10-13 19:50:53,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 19:50:53,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:50:53,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:54,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:54,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:54,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286764988] [2021-10-13 19:50:54,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286764988] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:54,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:54,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:54,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381110401] [2021-10-13 19:50:54,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:54,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:54,288 INFO L87 Difference]: Start difference. First operand 1086 states and 4769 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:55,227 INFO L93 Difference]: Finished difference Result 2134 states and 8298 transitions. [2021-10-13 19:50:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:50:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:50:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:55,249 INFO L225 Difference]: With dead ends: 2134 [2021-10-13 19:50:55,249 INFO L226 Difference]: Without dead ends: 2126 [2021-10-13 19:50:55,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:50:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-10-13 19:50:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1052. [2021-10-13 19:50:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.361560418648906) internal successors, (4584), 1051 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4584 transitions. [2021-10-13 19:50:55,313 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4584 transitions. Word has length 24 [2021-10-13 19:50:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:55,314 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 4584 transitions. [2021-10-13 19:50:55,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4584 transitions. [2021-10-13 19:50:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:55,319 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:55,319 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:55,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:55,532 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 [2021-10-13 19:50:55,533 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1279951463, now seen corresponding path program 6 times [2021-10-13 19:50:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:55,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825308010] [2021-10-13 19:50:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:50:55,535 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:55,536 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) [2021-10-13 19:50:55,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 19:50:55,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 19:50:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:50:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:56,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825308010] [2021-10-13 19:50:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825308010] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:56,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:56,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:56,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740521643] [2021-10-13 19:50:56,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:56,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:56,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:56,229 INFO L87 Difference]: Start difference. First operand 1052 states and 4584 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:56,923 INFO L93 Difference]: Finished difference Result 1624 states and 6330 transitions. [2021-10-13 19:50:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:50:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:50:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:56,935 INFO L225 Difference]: With dead ends: 1624 [2021-10-13 19:50:56,935 INFO L226 Difference]: Without dead ends: 1594 [2021-10-13 19:50:56,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:50:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-10-13 19:50:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1060. [2021-10-13 19:50:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 4.329556185080264) internal successors, (4585), 1059 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 4585 transitions. [2021-10-13 19:50:56,987 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 4585 transitions. Word has length 24 [2021-10-13 19:50:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 4585 transitions. [2021-10-13 19:50:56,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 4585 transitions. [2021-10-13 19:50:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:56,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:56,993 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:57,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:57,206 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 [2021-10-13 19:50:57,206 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1026755141, now seen corresponding path program 7 times [2021-10-13 19:50:57,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:57,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921857614] [2021-10-13 19:50:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:50:57,208 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:57,209 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) [2021-10-13 19:50:57,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 19:50:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:50:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:57,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:57,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:57,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921857614] [2021-10-13 19:50:57,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921857614] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:57,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:57,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234760453] [2021-10-13 19:50:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:57,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:57,808 INFO L87 Difference]: Start difference. First operand 1060 states and 4585 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:58,490 INFO L93 Difference]: Finished difference Result 1612 states and 6476 transitions. [2021-10-13 19:50:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:50:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:50:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:58,500 INFO L225 Difference]: With dead ends: 1612 [2021-10-13 19:50:58,500 INFO L226 Difference]: Without dead ends: 1612 [2021-10-13 19:50:58,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:50:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-10-13 19:50:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1060. [2021-10-13 19:50:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 4.329556185080264) internal successors, (4585), 1059 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 4585 transitions. [2021-10-13 19:50:58,563 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 4585 transitions. Word has length 24 [2021-10-13 19:50:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 4585 transitions. [2021-10-13 19:50:58,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:50:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 4585 transitions. [2021-10-13 19:50:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:50:58,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:58,569 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:58,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:58,783 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 [2021-10-13 19:50:58,783 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:50:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1455492690, now seen corresponding path program 3 times [2021-10-13 19:50:58,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:58,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995599523] [2021-10-13 19:50:58,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:50:58,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:58,788 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) [2021-10-13 19:50:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 19:50:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:50:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:50:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:50:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:59,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:59,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:59,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995599523] [2021-10-13 19:50:59,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995599523] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:50:59,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:50:59,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:50:59,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802748317] [2021-10-13 19:50:59,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:50:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:59,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:50:59,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:50:59,551 INFO L87 Difference]: Start difference. First operand 1060 states and 4585 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:07,408 INFO L93 Difference]: Finished difference Result 2012 states and 8182 transitions. [2021-10-13 19:51:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:51:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:07,420 INFO L225 Difference]: With dead ends: 2012 [2021-10-13 19:51:07,420 INFO L226 Difference]: Without dead ends: 1964 [2021-10-13 19:51:07,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:51:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-10-13 19:51:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1380. [2021-10-13 19:51:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 4.506163886874547) internal successors, (6214), 1379 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 6214 transitions. [2021-10-13 19:51:07,532 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 6214 transitions. Word has length 24 [2021-10-13 19:51:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:07,532 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 6214 transitions. [2021-10-13 19:51:07,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 6214 transitions. [2021-10-13 19:51:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:07,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:07,539 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:07,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:07,752 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 [2021-10-13 19:51:07,752 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1924569802, now seen corresponding path program 4 times [2021-10-13 19:51:07,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:07,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002989688] [2021-10-13 19:51:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:51:07,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:07,756 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) [2021-10-13 19:51:07,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 19:51:08,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:51:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:08,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:08,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002989688] [2021-10-13 19:51:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002989688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:08,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:08,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:08,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246920743] [2021-10-13 19:51:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:08,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:08,522 INFO L87 Difference]: Start difference. First operand 1380 states and 6214 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:11,066 INFO L93 Difference]: Finished difference Result 2164 states and 9144 transitions. [2021-10-13 19:51:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:51:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:11,077 INFO L225 Difference]: With dead ends: 2164 [2021-10-13 19:51:11,077 INFO L226 Difference]: Without dead ends: 2164 [2021-10-13 19:51:11,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:51:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-10-13 19:51:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1554. [2021-10-13 19:51:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 4.578879587894398) internal successors, (7111), 1553 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 7111 transitions. [2021-10-13 19:51:11,172 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 7111 transitions. Word has length 24 [2021-10-13 19:51:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:11,174 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 7111 transitions. [2021-10-13 19:51:11,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 7111 transitions. [2021-10-13 19:51:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:11,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:11,182 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:11,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-13 19:51:11,396 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 [2021-10-13 19:51:11,397 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1207472138, now seen corresponding path program 5 times [2021-10-13 19:51:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:11,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231463371] [2021-10-13 19:51:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:51:11,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:11,401 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) [2021-10-13 19:51:11,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 19:51:11,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:51:11,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:11,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:12,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:12,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231463371] [2021-10-13 19:51:12,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231463371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:12,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:12,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:12,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411793764] [2021-10-13 19:51:12,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:12,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:12,132 INFO L87 Difference]: Start difference. First operand 1554 states and 7111 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:12,882 INFO L93 Difference]: Finished difference Result 2312 states and 9621 transitions. [2021-10-13 19:51:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:51:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:12,897 INFO L225 Difference]: With dead ends: 2312 [2021-10-13 19:51:12,897 INFO L226 Difference]: Without dead ends: 2274 [2021-10-13 19:51:12,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:51:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-10-13 19:51:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1630. [2021-10-13 19:51:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 4.608962553713935) internal successors, (7508), 1629 states have internal predecessors, (7508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 7508 transitions. [2021-10-13 19:51:13,005 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 7508 transitions. Word has length 24 [2021-10-13 19:51:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 7508 transitions. [2021-10-13 19:51:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 7508 transitions. [2021-10-13 19:51:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:13,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:13,012 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:13,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 19:51:13,226 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 [2021-10-13 19:51:13,227 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1376287204, now seen corresponding path program 6 times [2021-10-13 19:51:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:13,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966262220] [2021-10-13 19:51:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:51:13,229 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:13,230 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) [2021-10-13 19:51:13,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 19:51:13,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:51:13,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:51:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:13,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:14,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966262220] [2021-10-13 19:51:14,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966262220] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:14,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:14,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:51:14,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907519338] [2021-10-13 19:51:14,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:51:14,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:51:14,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:51:14,157 INFO L87 Difference]: Start difference. First operand 1630 states and 7508 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:18,185 INFO L93 Difference]: Finished difference Result 3632 states and 15784 transitions. [2021-10-13 19:51:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:51:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:18,239 INFO L225 Difference]: With dead ends: 3632 [2021-10-13 19:51:18,240 INFO L226 Difference]: Without dead ends: 3618 [2021-10-13 19:51:18,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 668.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:51:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-10-13 19:51:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 1900. [2021-10-13 19:51:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 4.866771985255397) internal successors, (9242), 1899 states have internal predecessors, (9242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 9242 transitions. [2021-10-13 19:51:18,388 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 9242 transitions. Word has length 24 [2021-10-13 19:51:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:18,388 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 9242 transitions. [2021-10-13 19:51:18,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 9242 transitions. [2021-10-13 19:51:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:18,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:18,398 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:18,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:18,614 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 [2021-10-13 19:51:18,614 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1166605344, now seen corresponding path program 7 times [2021-10-13 19:51:18,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:18,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408614819] [2021-10-13 19:51:18,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:51:18,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:18,617 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) [2021-10-13 19:51:18,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 19:51:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:18,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:19,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:19,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408614819] [2021-10-13 19:51:19,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408614819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:19,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:19,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229294859] [2021-10-13 19:51:19,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:19,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:19,362 INFO L87 Difference]: Start difference. First operand 1900 states and 9242 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:30,000 INFO L93 Difference]: Finished difference Result 2828 states and 12715 transitions. [2021-10-13 19:51:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:51:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:30,010 INFO L225 Difference]: With dead ends: 2828 [2021-10-13 19:51:30,011 INFO L226 Difference]: Without dead ends: 2792 [2021-10-13 19:51:30,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:51:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-10-13 19:51:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2138. [2021-10-13 19:51:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 4.928872250818905) internal successors, (10533), 2137 states have internal predecessors, (10533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 10533 transitions. [2021-10-13 19:51:30,159 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 10533 transitions. Word has length 24 [2021-10-13 19:51:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:30,159 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 10533 transitions. [2021-10-13 19:51:30,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 10533 transitions. [2021-10-13 19:51:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:30,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:30,168 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:30,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:30,381 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 [2021-10-13 19:51:30,381 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash 341233678, now seen corresponding path program 8 times [2021-10-13 19:51:30,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:30,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247907792] [2021-10-13 19:51:30,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:30,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:30,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:30,386 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) [2021-10-13 19:51:30,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 19:51:30,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:30,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:30,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:31,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:31,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247907792] [2021-10-13 19:51:31,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247907792] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:31,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:31,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:31,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501069359] [2021-10-13 19:51:31,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:31,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:31,201 INFO L87 Difference]: Start difference. First operand 2138 states and 10533 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:38,026 INFO L93 Difference]: Finished difference Result 2966 states and 13288 transitions. [2021-10-13 19:51:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:51:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:38,036 INFO L225 Difference]: With dead ends: 2966 [2021-10-13 19:51:38,036 INFO L226 Difference]: Without dead ends: 2928 [2021-10-13 19:51:38,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2090.5ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:51:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-10-13 19:51:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2196. [2021-10-13 19:51:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 4.948519362186788) internal successors, (10862), 2195 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 10862 transitions. [2021-10-13 19:51:38,129 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 10862 transitions. Word has length 24 [2021-10-13 19:51:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:38,129 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 10862 transitions. [2021-10-13 19:51:38,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 10862 transitions. [2021-10-13 19:51:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:38,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:38,138 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:38,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:38,351 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 [2021-10-13 19:51:38,352 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2052441632, now seen corresponding path program 9 times [2021-10-13 19:51:38,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:38,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424044847] [2021-10-13 19:51:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:51:38,354 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:38,355 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) [2021-10-13 19:51:38,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 19:51:38,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:51:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:39,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:39,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:39,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424044847] [2021-10-13 19:51:39,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424044847] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:39,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:39,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:39,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63217430] [2021-10-13 19:51:39,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:39,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:39,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:39,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:39,169 INFO L87 Difference]: Start difference. First operand 2196 states and 10862 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:39,740 INFO L93 Difference]: Finished difference Result 2948 states and 13493 transitions. [2021-10-13 19:51:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:51:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:39,751 INFO L225 Difference]: With dead ends: 2948 [2021-10-13 19:51:39,751 INFO L226 Difference]: Without dead ends: 2948 [2021-10-13 19:51:39,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2021-10-13 19:51:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2196. [2021-10-13 19:51:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 4.948519362186788) internal successors, (10862), 2195 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 10862 transitions. [2021-10-13 19:51:39,871 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 10862 transitions. Word has length 24 [2021-10-13 19:51:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 10862 transitions. [2021-10-13 19:51:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 10862 transitions. [2021-10-13 19:51:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:39,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:39,881 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:39,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:40,094 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 [2021-10-13 19:51:40,095 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1197134978, now seen corresponding path program 10 times [2021-10-13 19:51:40,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:40,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923493834] [2021-10-13 19:51:40,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:51:40,096 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:40,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:40,098 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) [2021-10-13 19:51:40,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 19:51:40,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:51:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:40,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:40,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:40,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923493834] [2021-10-13 19:51:40,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923493834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:40,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:40,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:40,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068784306] [2021-10-13 19:51:40,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:40,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:40,958 INFO L87 Difference]: Start difference. First operand 2196 states and 10862 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:42,136 INFO L93 Difference]: Finished difference Result 3098 states and 13976 transitions. [2021-10-13 19:51:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:51:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:42,146 INFO L225 Difference]: With dead ends: 3098 [2021-10-13 19:51:42,146 INFO L226 Difference]: Without dead ends: 3086 [2021-10-13 19:51:42,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:51:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2021-10-13 19:51:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2178. [2021-10-13 19:51:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 4.908589802480478) internal successors, (10686), 2177 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 10686 transitions. [2021-10-13 19:51:42,227 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 10686 transitions. Word has length 24 [2021-10-13 19:51:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 10686 transitions. [2021-10-13 19:51:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 10686 transitions. [2021-10-13 19:51:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:42,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:42,236 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:42,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:42,451 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 [2021-10-13 19:51:42,452 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -403468820, now seen corresponding path program 11 times [2021-10-13 19:51:42,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:42,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682140997] [2021-10-13 19:51:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:51:42,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:42,456 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) [2021-10-13 19:51:42,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 19:51:42,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:43,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:43,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682140997] [2021-10-13 19:51:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682140997] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:43,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489765703] [2021-10-13 19:51:43,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:43,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:43,308 INFO L87 Difference]: Start difference. First operand 2178 states and 10686 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:44,379 INFO L93 Difference]: Finished difference Result 2826 states and 13224 transitions. [2021-10-13 19:51:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:51:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:44,389 INFO L225 Difference]: With dead ends: 2826 [2021-10-13 19:51:44,389 INFO L226 Difference]: Without dead ends: 2826 [2021-10-13 19:51:44,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:51:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-10-13 19:51:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2258. [2021-10-13 19:51:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 4.908728400531679) internal successors, (11079), 2257 states have internal predecessors, (11079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 11079 transitions. [2021-10-13 19:51:44,467 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 11079 transitions. Word has length 24 [2021-10-13 19:51:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 11079 transitions. [2021-10-13 19:51:44,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 11079 transitions. [2021-10-13 19:51:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:44,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:44,477 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:44,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:44,690 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 [2021-10-13 19:51:44,690 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1029947842, now seen corresponding path program 8 times [2021-10-13 19:51:44,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:44,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113216836] [2021-10-13 19:51:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:44,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:44,693 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) [2021-10-13 19:51:44,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 19:51:45,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:45,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:45,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:45,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113216836] [2021-10-13 19:51:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113216836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:45,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:45,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:45,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14591923] [2021-10-13 19:51:45,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:45,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:45,485 INFO L87 Difference]: Start difference. First operand 2258 states and 11079 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:46,111 INFO L93 Difference]: Finished difference Result 5770 states and 26918 transitions. [2021-10-13 19:51:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:51:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 19:51:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:46,130 INFO L225 Difference]: With dead ends: 5770 [2021-10-13 19:51:46,130 INFO L226 Difference]: Without dead ends: 5770 [2021-10-13 19:51:46,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-10-13 19:51:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 2596. [2021-10-13 19:51:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 5.141811175337187) internal successors, (13343), 2595 states have internal predecessors, (13343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 13343 transitions. [2021-10-13 19:51:46,263 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 13343 transitions. Word has length 24 [2021-10-13 19:51:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:46,264 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 13343 transitions. [2021-10-13 19:51:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 13343 transitions. [2021-10-13 19:51:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:46,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:46,278 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:46,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-13 19:51:46,492 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 [2021-10-13 19:51:46,493 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1708072895, now seen corresponding path program 9 times [2021-10-13 19:51:46,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:46,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769254210] [2021-10-13 19:51:46,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:51:46,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:46,496 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) [2021-10-13 19:51:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 19:51:47,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:51:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:47,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:47,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:47,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769254210] [2021-10-13 19:51:47,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769254210] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:47,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:47,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:47,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169797354] [2021-10-13 19:51:47,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:47,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:47,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:47,340 INFO L87 Difference]: Start difference. First operand 2596 states and 13343 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:48,294 INFO L93 Difference]: Finished difference Result 4898 states and 22366 transitions. [2021-10-13 19:51:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:51:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:51:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:48,312 INFO L225 Difference]: With dead ends: 4898 [2021-10-13 19:51:48,312 INFO L226 Difference]: Without dead ends: 4840 [2021-10-13 19:51:48,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:51:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4840 states. [2021-10-13 19:51:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4840 to 2722. [2021-10-13 19:51:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 5.100698272693863) internal successors, (13879), 2721 states have internal predecessors, (13879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 13879 transitions. [2021-10-13 19:51:48,498 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 13879 transitions. Word has length 24 [2021-10-13 19:51:48,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:48,499 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 13879 transitions. [2021-10-13 19:51:48,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 13879 transitions. [2021-10-13 19:51:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:48,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:48,509 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:48,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:48,710 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 [2021-10-13 19:51:48,710 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1961269217, now seen corresponding path program 10 times [2021-10-13 19:51:48,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:48,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011775130] [2021-10-13 19:51:48,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:51:48,713 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:48,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:48,714 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) [2021-10-13 19:51:48,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 19:51:49,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:51:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:49,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:49,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:49,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:49,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011775130] [2021-10-13 19:51:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011775130] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:49,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:49,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:49,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744052252] [2021-10-13 19:51:49,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:49,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:49,498 INFO L87 Difference]: Start difference. First operand 2722 states and 13879 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:50,672 INFO L93 Difference]: Finished difference Result 5182 states and 24018 transitions. [2021-10-13 19:51:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:51:50,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:51:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:50,745 INFO L225 Difference]: With dead ends: 5182 [2021-10-13 19:51:50,745 INFO L226 Difference]: Without dead ends: 5182 [2021-10-13 19:51:50,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:51:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2021-10-13 19:51:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 2684. [2021-10-13 19:51:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 4.995900111815132) internal successors, (13404), 2683 states have internal predecessors, (13404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 13404 transitions. [2021-10-13 19:51:50,906 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 13404 transitions. Word has length 24 [2021-10-13 19:51:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:50,906 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 13404 transitions. [2021-10-13 19:51:50,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 13404 transitions. [2021-10-13 19:51:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 19:51:50,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:50,921 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:50,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:51,134 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 [2021-10-13 19:51:51,135 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1503467771, now seen corresponding path program 11 times [2021-10-13 19:51:51,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:51,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647236033] [2021-10-13 19:51:51,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:51:51,137 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:51,138 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) [2021-10-13 19:51:51,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-13 19:51:51,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:51:51,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:51,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:51,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647236033] [2021-10-13 19:51:51,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647236033] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:51,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:51:51,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730307358] [2021-10-13 19:51:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:51,941 INFO L87 Difference]: Start difference. First operand 2684 states and 13404 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:53,760 INFO L93 Difference]: Finished difference Result 4254 states and 20174 transitions. [2021-10-13 19:51:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:51:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-13 19:51:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:53,775 INFO L225 Difference]: With dead ends: 4254 [2021-10-13 19:51:53,775 INFO L226 Difference]: Without dead ends: 4254 [2021-10-13 19:51:53,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:51:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-10-13 19:51:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 2902. [2021-10-13 19:51:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 5.0027576697690455) internal successors, (14513), 2901 states have internal predecessors, (14513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 14513 transitions. [2021-10-13 19:51:53,857 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 14513 transitions. Word has length 24 [2021-10-13 19:51:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:53,857 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 14513 transitions. [2021-10-13 19:51:53,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-10-13 19:51:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 14513 transitions. [2021-10-13 19:51:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:51:53,865 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:53,865 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:53,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:54,066 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 [2021-10-13 19:51:54,066 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 20530467, now seen corresponding path program 12 times [2021-10-13 19:51:54,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:54,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960714733] [2021-10-13 19:51:54,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:51:54,067 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:54,068 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) [2021-10-13 19:51:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 19:51:54,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 19:51:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:51:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:55,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:55,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:55,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960714733] [2021-10-13 19:51:55,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960714733] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:55,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:55,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:51:55,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62742690] [2021-10-13 19:51:55,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:51:55,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:55,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:51:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:55,583 INFO L87 Difference]: Start difference. First operand 2902 states and 14513 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:58,142 INFO L93 Difference]: Finished difference Result 3458 states and 16472 transitions. [2021-10-13 19:51:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:51:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:51:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:58,156 INFO L225 Difference]: With dead ends: 3458 [2021-10-13 19:51:58,156 INFO L226 Difference]: Without dead ends: 3408 [2021-10-13 19:51:58,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-10-13 19:51:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2986. [2021-10-13 19:51:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.9798994974874375) internal successors, (14865), 2985 states have internal predecessors, (14865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 14865 transitions. [2021-10-13 19:51:58,246 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 14865 transitions. Word has length 25 [2021-10-13 19:51:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 14865 transitions. [2021-10-13 19:51:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 14865 transitions. [2021-10-13 19:51:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:51:58,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:58,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:58,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-13 19:51:58,456 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 [2021-10-13 19:51:58,456 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:51:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1499108146, now seen corresponding path program 1 times [2021-10-13 19:51:58,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:58,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280420623] [2021-10-13 19:51:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:58,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:58,460 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) [2021-10-13 19:51:58,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 19:51:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:51:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:59,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:59,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:59,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280420623] [2021-10-13 19:51:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280420623] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:59,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:51:59,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634657882] [2021-10-13 19:51:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:51:59,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:51:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:59,947 INFO L87 Difference]: Start difference. First operand 2986 states and 14865 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:00,569 INFO L93 Difference]: Finished difference Result 4108 states and 19507 transitions. [2021-10-13 19:52:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:52:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:00,583 INFO L225 Difference]: With dead ends: 4108 [2021-10-13 19:52:00,583 INFO L226 Difference]: Without dead ends: 3988 [2021-10-13 19:52:00,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2021-10-13 19:52:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3316. [2021-10-13 19:52:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 5.0711915535444945) internal successors, (16811), 3315 states have internal predecessors, (16811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 16811 transitions. [2021-10-13 19:52:00,679 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 16811 transitions. Word has length 25 [2021-10-13 19:52:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:00,679 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 16811 transitions. [2021-10-13 19:52:00,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 16811 transitions. [2021-10-13 19:52:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:00,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:00,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:00,889 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 [2021-10-13 19:52:00,890 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2078761486, now seen corresponding path program 2 times [2021-10-13 19:52:00,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:00,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987081029] [2021-10-13 19:52:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:52:00,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:00,893 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) [2021-10-13 19:52:00,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 19:52:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:52:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:02,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:02,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987081029] [2021-10-13 19:52:02,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987081029] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:02,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:02,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:02,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247798248] [2021-10-13 19:52:02,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:02,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:02,617 INFO L87 Difference]: Start difference. First operand 3316 states and 16811 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:03,416 INFO L93 Difference]: Finished difference Result 4366 states and 21219 transitions. [2021-10-13 19:52:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:52:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:03,431 INFO L225 Difference]: With dead ends: 4366 [2021-10-13 19:52:03,431 INFO L226 Difference]: Without dead ends: 4264 [2021-10-13 19:52:03,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-10-13 19:52:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3520. [2021-10-13 19:52:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 5.185848252344416) internal successors, (18249), 3519 states have internal predecessors, (18249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 18249 transitions. [2021-10-13 19:52:03,537 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 18249 transitions. Word has length 25 [2021-10-13 19:52:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:03,537 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 18249 transitions. [2021-10-13 19:52:03,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 18249 transitions. [2021-10-13 19:52:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:03,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:03,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:03,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:03,748 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 [2021-10-13 19:52:03,749 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1426692510, now seen corresponding path program 3 times [2021-10-13 19:52:03,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:03,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211594565] [2021-10-13 19:52:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:52:03,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:03,753 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) [2021-10-13 19:52:03,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 19:52:04,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:52:04,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:04,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:05,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211594565] [2021-10-13 19:52:05,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211594565] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:05,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:05,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:05,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790040387] [2021-10-13 19:52:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:05,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:05,335 INFO L87 Difference]: Start difference. First operand 3520 states and 18249 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:06,193 INFO L93 Difference]: Finished difference Result 4976 states and 24373 transitions. [2021-10-13 19:52:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:52:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:06,211 INFO L225 Difference]: With dead ends: 4976 [2021-10-13 19:52:06,211 INFO L226 Difference]: Without dead ends: 4854 [2021-10-13 19:52:06,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-10-13 19:52:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 3744. [2021-10-13 19:52:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 5.2631578947368425) internal successors, (19700), 3743 states have internal predecessors, (19700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 19700 transitions. [2021-10-13 19:52:06,325 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 19700 transitions. Word has length 25 [2021-10-13 19:52:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:06,326 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 19700 transitions. [2021-10-13 19:52:06,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 19700 transitions. [2021-10-13 19:52:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:06,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:06,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:06,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:06,553 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 [2021-10-13 19:52:06,553 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1191048782, now seen corresponding path program 4 times [2021-10-13 19:52:06,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:06,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164403506] [2021-10-13 19:52:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:52:06,556 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:06,557 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) [2021-10-13 19:52:06,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 19:52:07,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:52:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:07,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:08,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:08,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164403506] [2021-10-13 19:52:08,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164403506] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:08,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:08,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:08,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955191459] [2021-10-13 19:52:08,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:08,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:08,150 INFO L87 Difference]: Start difference. First operand 3744 states and 19700 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:08,644 INFO L93 Difference]: Finished difference Result 4548 states and 22982 transitions. [2021-10-13 19:52:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:52:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:08,669 INFO L225 Difference]: With dead ends: 4548 [2021-10-13 19:52:08,669 INFO L226 Difference]: Without dead ends: 4446 [2021-10-13 19:52:08,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-10-13 19:52:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 4024. [2021-10-13 19:52:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 5.276659209545116) internal successors, (21228), 4023 states have internal predecessors, (21228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 21228 transitions. [2021-10-13 19:52:08,827 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 21228 transitions. Word has length 25 [2021-10-13 19:52:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:08,828 INFO L470 AbstractCegarLoop]: Abstraction has 4024 states and 21228 transitions. [2021-10-13 19:52:08,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 21228 transitions. [2021-10-13 19:52:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:08,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:08,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:08,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-13 19:52:09,042 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 [2021-10-13 19:52:09,043 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1024836366, now seen corresponding path program 5 times [2021-10-13 19:52:09,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:09,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631643015] [2021-10-13 19:52:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:52:09,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:09,046 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) [2021-10-13 19:52:09,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 19:52:09,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:52:09,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:10,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:10,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:10,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631643015] [2021-10-13 19:52:10,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631643015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:10,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:10,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:10,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923115285] [2021-10-13 19:52:10,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:10,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:10,684 INFO L87 Difference]: Start difference. First operand 4024 states and 21228 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:11,459 INFO L93 Difference]: Finished difference Result 5520 states and 27712 transitions. [2021-10-13 19:52:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:52:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:11,479 INFO L225 Difference]: With dead ends: 5520 [2021-10-13 19:52:11,479 INFO L226 Difference]: Without dead ends: 5414 [2021-10-13 19:52:11,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-10-13 19:52:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 4272. [2021-10-13 19:52:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4271 states have (on average 5.355654413486303) internal successors, (22874), 4271 states have internal predecessors, (22874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 22874 transitions. [2021-10-13 19:52:11,622 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 22874 transitions. Word has length 25 [2021-10-13 19:52:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 4272 states and 22874 transitions. [2021-10-13 19:52:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 22874 transitions. [2021-10-13 19:52:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:11,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:11,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:11,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-10-13 19:52:11,841 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 [2021-10-13 19:52:11,842 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1880215582, now seen corresponding path program 6 times [2021-10-13 19:52:11,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:11,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385545259] [2021-10-13 19:52:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:52:11,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:11,878 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) [2021-10-13 19:52:11,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 19:52:12,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:52:12,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:13,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:13,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:13,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385545259] [2021-10-13 19:52:13,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385545259] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:13,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:13,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:13,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409452051] [2021-10-13 19:52:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:13,676 INFO L87 Difference]: Start difference. First operand 4272 states and 22874 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:14,269 INFO L93 Difference]: Finished difference Result 5074 states and 26225 transitions. [2021-10-13 19:52:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:52:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:14,290 INFO L225 Difference]: With dead ends: 5074 [2021-10-13 19:52:14,290 INFO L226 Difference]: Without dead ends: 4980 [2021-10-13 19:52:14,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2021-10-13 19:52:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 4478. [2021-10-13 19:52:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 5.380165289256198) internal successors, (24087), 4477 states have internal predecessors, (24087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 24087 transitions. [2021-10-13 19:52:14,454 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 24087 transitions. Word has length 25 [2021-10-13 19:52:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 24087 transitions. [2021-10-13 19:52:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 24087 transitions. [2021-10-13 19:52:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:14,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:14,468 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:14,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:14,668 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 [2021-10-13 19:52:14,669 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2022040157, now seen corresponding path program 13 times [2021-10-13 19:52:14,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:14,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105126801] [2021-10-13 19:52:14,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:52:14,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:14,673 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) [2021-10-13 19:52:14,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 19:52:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:18,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:18,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105126801] [2021-10-13 19:52:18,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105126801] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:18,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:18,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:18,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716128829] [2021-10-13 19:52:18,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:18,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-13 19:52:18,243 INFO L87 Difference]: Start difference. First operand 4478 states and 24087 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:22,972 INFO L93 Difference]: Finished difference Result 5260 states and 26772 transitions. [2021-10-13 19:52:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:52:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:22,992 INFO L225 Difference]: With dead ends: 5260 [2021-10-13 19:52:22,992 INFO L226 Difference]: Without dead ends: 5210 [2021-10-13 19:52:22,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6303.5ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-13 19:52:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-10-13 19:52:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4544. [2021-10-13 19:52:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 5.37838432753687) internal successors, (24434), 4543 states have internal predecessors, (24434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 24434 transitions. [2021-10-13 19:52:23,191 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 24434 transitions. Word has length 25 [2021-10-13 19:52:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:23,192 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 24434 transitions. [2021-10-13 19:52:23,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 24434 transitions. [2021-10-13 19:52:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:23,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:23,209 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:23,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:23,409 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 [2021-10-13 19:52:23,410 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash -466996205, now seen corresponding path program 12 times [2021-10-13 19:52:23,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:23,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429679849] [2021-10-13 19:52:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:52:23,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:23,414 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) [2021-10-13 19:52:23,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-13 19:52:24,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 19:52:24,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:24,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:24,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:24,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429679849] [2021-10-13 19:52:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429679849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:24,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:24,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:24,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135025256] [2021-10-13 19:52:24,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:24,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:24,971 INFO L87 Difference]: Start difference. First operand 4544 states and 24434 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:31,545 INFO L93 Difference]: Finished difference Result 5134 states and 26518 transitions. [2021-10-13 19:52:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:52:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:31,563 INFO L225 Difference]: With dead ends: 5134 [2021-10-13 19:52:31,563 INFO L226 Difference]: Without dead ends: 5104 [2021-10-13 19:52:31,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-10-13 19:52:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4838. [2021-10-13 19:52:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 5.301013024602026) internal successors, (25641), 4837 states have internal predecessors, (25641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 25641 transitions. [2021-10-13 19:52:31,689 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 25641 transitions. Word has length 25 [2021-10-13 19:52:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:31,689 INFO L470 AbstractCegarLoop]: Abstraction has 4838 states and 25641 transitions. [2021-10-13 19:52:31,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 25641 transitions. [2021-10-13 19:52:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:31,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:31,702 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:31,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-13 19:52:31,903 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 [2021-10-13 19:52:31,904 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -589094059, now seen corresponding path program 13 times [2021-10-13 19:52:31,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:31,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283915211] [2021-10-13 19:52:31,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:52:31,906 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:31,907 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) [2021-10-13 19:52:31,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-13 19:52:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 19:52:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:33,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:34,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:34,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283915211] [2021-10-13 19:52:34,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283915211] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:34,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:34,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:52:34,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301872532] [2021-10-13 19:52:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:52:34,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:52:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:52:34,040 INFO L87 Difference]: Start difference. First operand 4838 states and 25641 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:37,814 INFO L93 Difference]: Finished difference Result 9872 states and 47313 transitions. [2021-10-13 19:52:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:52:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:37,854 INFO L225 Difference]: With dead ends: 9872 [2021-10-13 19:52:37,854 INFO L226 Difference]: Without dead ends: 9872 [2021-10-13 19:52:37,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1918.6ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:52:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2021-10-13 19:52:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 5428. [2021-10-13 19:52:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 5.358577482955592) internal successors, (29081), 5427 states have internal predecessors, (29081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 29081 transitions. [2021-10-13 19:52:38,222 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 29081 transitions. Word has length 25 [2021-10-13 19:52:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 5428 states and 29081 transitions. [2021-10-13 19:52:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 29081 transitions. [2021-10-13 19:52:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:38,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:38,236 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:38,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:38,437 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 [2021-10-13 19:52:38,437 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 585027665, now seen corresponding path program 14 times [2021-10-13 19:52:38,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:38,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589822488] [2021-10-13 19:52:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:52:38,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:38,441 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) [2021-10-13 19:52:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 19:52:39,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:52:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:39,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:41,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:42,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:42,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589822488] [2021-10-13 19:52:42,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589822488] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:42,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:42,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:42,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117156225] [2021-10-13 19:52:42,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:42,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-13 19:52:42,046 INFO L87 Difference]: Start difference. First operand 5428 states and 29081 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:46,970 INFO L93 Difference]: Finished difference Result 6178 states and 31908 transitions. [2021-10-13 19:52:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:52:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:46,998 INFO L225 Difference]: With dead ends: 6178 [2021-10-13 19:52:46,998 INFO L226 Difference]: Without dead ends: 6148 [2021-10-13 19:52:46,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6296.5ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-13 19:52:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-10-13 19:52:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 5630. [2021-10-13 19:52:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 5629 states have (on average 5.343933203055605) internal successors, (30081), 5629 states have internal predecessors, (30081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 30081 transitions. [2021-10-13 19:52:47,164 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 30081 transitions. Word has length 25 [2021-10-13 19:52:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 5630 states and 30081 transitions. [2021-10-13 19:52:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 30081 transitions. [2021-10-13 19:52:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:47,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:47,180 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:47,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:47,381 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 [2021-10-13 19:52:47,381 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash 218536845, now seen corresponding path program 15 times [2021-10-13 19:52:47,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:47,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762304717] [2021-10-13 19:52:47,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:52:47,384 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:47,385 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:47,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-13 19:52:48,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:52:48,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:48,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:50,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:51,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:51,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762304717] [2021-10-13 19:52:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762304717] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:51,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:51,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:51,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947643183] [2021-10-13 19:52:51,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:51,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-13 19:52:51,076 INFO L87 Difference]: Start difference. First operand 5630 states and 30081 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:57,996 INFO L93 Difference]: Finished difference Result 6040 states and 31335 transitions. [2021-10-13 19:52:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:52:57,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:52:57,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:58,019 INFO L225 Difference]: With dead ends: 6040 [2021-10-13 19:52:58,020 INFO L226 Difference]: Without dead ends: 6010 [2021-10-13 19:52:58,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6300.5ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-13 19:52:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2021-10-13 19:52:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 5616. [2021-10-13 19:52:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5616 states, 5615 states have (on average 5.343009795191452) internal successors, (30001), 5615 states have internal predecessors, (30001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5616 states to 5616 states and 30001 transitions. [2021-10-13 19:52:58,193 INFO L78 Accepts]: Start accepts. Automaton has 5616 states and 30001 transitions. Word has length 25 [2021-10-13 19:52:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:58,193 INFO L470 AbstractCegarLoop]: Abstraction has 5616 states and 30001 transitions. [2021-10-13 19:52:58,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5616 states and 30001 transitions. [2021-10-13 19:52:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:52:58,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:58,209 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:58,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:58,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:58,410 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:52:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1422328995, now seen corresponding path program 16 times [2021-10-13 19:52:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:58,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322697328] [2021-10-13 19:52:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:52:58,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:58,414 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:58,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-13 19:52:59,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:52:59,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:59,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:59,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322697328] [2021-10-13 19:52:59,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322697328] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:59,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:59,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:52:59,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865005522] [2021-10-13 19:52:59,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:52:59,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:52:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:52:59,956 INFO L87 Difference]: Start difference. First operand 5616 states and 30001 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:08,784 INFO L93 Difference]: Finished difference Result 6088 states and 31693 transitions. [2021-10-13 19:53:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:53:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:08,813 INFO L225 Difference]: With dead ends: 6088 [2021-10-13 19:53:08,813 INFO L226 Difference]: Without dead ends: 6058 [2021-10-13 19:53:08,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-10-13 19:53:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 5766. [2021-10-13 19:53:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5766 states, 5765 states have (on average 5.324024284475282) internal successors, (30693), 5765 states have internal predecessors, (30693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5766 states to 5766 states and 30693 transitions. [2021-10-13 19:53:08,990 INFO L78 Accepts]: Start accepts. Automaton has 5766 states and 30693 transitions. Word has length 25 [2021-10-13 19:53:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:08,991 INFO L470 AbstractCegarLoop]: Abstraction has 5766 states and 30693 transitions. [2021-10-13 19:53:08,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5766 states and 30693 transitions. [2021-10-13 19:53:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:09,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:09,007 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:09,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:09,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:09,208 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -366119867, now seen corresponding path program 14 times [2021-10-13 19:53:09,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:09,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305360871] [2021-10-13 19:53:09,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:53:09,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:09,211 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:09,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 19:53:10,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:53:10,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:12,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:13,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:13,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305360871] [2021-10-13 19:53:13,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305360871] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:13,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:13,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:13,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314746269] [2021-10-13 19:53:13,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:13,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-13 19:53:13,038 INFO L87 Difference]: Start difference. First operand 5766 states and 30693 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:18,478 INFO L93 Difference]: Finished difference Result 6286 states and 32313 transitions. [2021-10-13 19:53:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:53:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:18,502 INFO L225 Difference]: With dead ends: 6286 [2021-10-13 19:53:18,502 INFO L226 Difference]: Without dead ends: 6236 [2021-10-13 19:53:18,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6299.2ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-13 19:53:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-10-13 19:53:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5752. [2021-10-13 19:53:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5752 states, 5751 states have (on average 5.3227264823508955) internal successors, (30611), 5751 states have internal predecessors, (30611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5752 states to 5752 states and 30611 transitions. [2021-10-13 19:53:18,736 INFO L78 Accepts]: Start accepts. Automaton has 5752 states and 30611 transitions. Word has length 25 [2021-10-13 19:53:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:18,736 INFO L470 AbstractCegarLoop]: Abstraction has 5752 states and 30611 transitions. [2021-10-13 19:53:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5752 states and 30611 transitions. [2021-10-13 19:53:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:18,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:18,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:18,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:18,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:18,971 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:18,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1852887698, now seen corresponding path program 7 times [2021-10-13 19:53:18,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:18,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355328387] [2021-10-13 19:53:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:53:18,973 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:18,974 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-13 19:53:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:53:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:20,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:20,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:20,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355328387] [2021-10-13 19:53:20,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355328387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:20,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:20,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:20,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095259137] [2021-10-13 19:53:20,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:20,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:20,855 INFO L87 Difference]: Start difference. First operand 5752 states and 30611 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:21,512 INFO L93 Difference]: Finished difference Result 6900 states and 35380 transitions. [2021-10-13 19:53:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:53:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:21,538 INFO L225 Difference]: With dead ends: 6900 [2021-10-13 19:53:21,538 INFO L226 Difference]: Without dead ends: 6780 [2021-10-13 19:53:21,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6780 states. [2021-10-13 19:53:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6780 to 5946. [2021-10-13 19:53:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5946 states, 5945 states have (on average 5.35878889823381) internal successors, (31858), 5945 states have internal predecessors, (31858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5946 states to 5946 states and 31858 transitions. [2021-10-13 19:53:21,778 INFO L78 Accepts]: Start accepts. Automaton has 5946 states and 31858 transitions. Word has length 25 [2021-10-13 19:53:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:21,778 INFO L470 AbstractCegarLoop]: Abstraction has 5946 states and 31858 transitions. [2021-10-13 19:53:21,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5946 states and 31858 transitions. [2021-10-13 19:53:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:21,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:21,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:21,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:21,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:22,000 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1135790034, now seen corresponding path program 8 times [2021-10-13 19:53:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:22,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075498643] [2021-10-13 19:53:22,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:53:22,002 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:22,003 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:22,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-13 19:53:22,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:53:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:22,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:23,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:23,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075498643] [2021-10-13 19:53:23,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075498643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:23,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:23,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:23,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436434014] [2021-10-13 19:53:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:23,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:23,996 INFO L87 Difference]: Start difference. First operand 5946 states and 31858 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:24,785 INFO L93 Difference]: Finished difference Result 7044 states and 36448 transitions. [2021-10-13 19:53:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:53:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:24,812 INFO L225 Difference]: With dead ends: 7044 [2021-10-13 19:53:24,812 INFO L226 Difference]: Without dead ends: 6942 [2021-10-13 19:53:24,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-10-13 19:53:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6034. [2021-10-13 19:53:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 5.411735454997514) internal successors, (32649), 6033 states have internal predecessors, (32649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 32649 transitions. [2021-10-13 19:53:24,994 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 32649 transitions. Word has length 25 [2021-10-13 19:53:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:24,994 INFO L470 AbstractCegarLoop]: Abstraction has 6034 states and 32649 transitions. [2021-10-13 19:53:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 32649 transitions. [2021-10-13 19:53:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:25,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:25,017 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:25,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:25,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:25,230 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash 407162894, now seen corresponding path program 9 times [2021-10-13 19:53:25,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:25,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88752534] [2021-10-13 19:53:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:53:25,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:25,234 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:25,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-13 19:53:26,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:53:26,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:27,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:27,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88752534] [2021-10-13 19:53:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88752534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:27,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:27,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699138898] [2021-10-13 19:53:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:27,108 INFO L87 Difference]: Start difference. First operand 6034 states and 32649 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:27,740 INFO L93 Difference]: Finished difference Result 7558 states and 39059 transitions. [2021-10-13 19:53:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:27,770 INFO L225 Difference]: With dead ends: 7558 [2021-10-13 19:53:27,770 INFO L226 Difference]: Without dead ends: 7436 [2021-10-13 19:53:27,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7436 states. [2021-10-13 19:53:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7436 to 6268. [2021-10-13 19:53:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 6267 states have (on average 5.4538056486357105) internal successors, (34179), 6267 states have internal predecessors, (34179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 34179 transitions. [2021-10-13 19:53:28,069 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 34179 transitions. Word has length 25 [2021-10-13 19:53:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:28,069 INFO L470 AbstractCegarLoop]: Abstraction has 6268 states and 34179 transitions. [2021-10-13 19:53:28,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 34179 transitions. [2021-10-13 19:53:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:28,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:28,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:28,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:28,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:28,289 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash -816743854, now seen corresponding path program 10 times [2021-10-13 19:53:28,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:28,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45727190] [2021-10-13 19:53:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:53:28,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:28,293 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:28,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-13 19:53:29,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:53:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:29,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:30,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:30,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45727190] [2021-10-13 19:53:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45727190] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:30,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:30,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:30,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956364165] [2021-10-13 19:53:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:30,087 INFO L87 Difference]: Start difference. First operand 6268 states and 34179 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:30,635 INFO L93 Difference]: Finished difference Result 7150 states and 37772 transitions. [2021-10-13 19:53:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:53:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:30,663 INFO L225 Difference]: With dead ends: 7150 [2021-10-13 19:53:30,663 INFO L226 Difference]: Without dead ends: 7034 [2021-10-13 19:53:30,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-10-13 19:53:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6544. [2021-10-13 19:53:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 5.456518416628458) internal successors, (35702), 6543 states have internal predecessors, (35702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 35702 transitions. [2021-10-13 19:53:30,844 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 35702 transitions. Word has length 25 [2021-10-13 19:53:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:30,845 INFO L470 AbstractCegarLoop]: Abstraction has 6544 states and 35702 transitions. [2021-10-13 19:53:30,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 35702 transitions. [2021-10-13 19:53:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:30,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:30,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:30,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:31,063 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1649166546, now seen corresponding path program 11 times [2021-10-13 19:53:31,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:31,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095806754] [2021-10-13 19:53:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:53:31,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:31,072 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:31,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-13 19:53:32,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:53:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:32,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:32,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:33,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:33,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095806754] [2021-10-13 19:53:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095806754] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:33,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:33,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660640268] [2021-10-13 19:53:33,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:33,067 INFO L87 Difference]: Start difference. First operand 6544 states and 35702 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:33,778 INFO L93 Difference]: Finished difference Result 8134 states and 42596 transitions. [2021-10-13 19:53:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:33,810 INFO L225 Difference]: With dead ends: 8134 [2021-10-13 19:53:33,810 INFO L226 Difference]: Without dead ends: 8028 [2021-10-13 19:53:33,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2021-10-13 19:53:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 6834. [2021-10-13 19:53:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6834 states, 6833 states have (on average 5.4999268256988145) internal successors, (37581), 6833 states have internal predecessors, (37581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 37581 transitions. [2021-10-13 19:53:34,197 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 37581 transitions. Word has length 25 [2021-10-13 19:53:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:34,197 INFO L470 AbstractCegarLoop]: Abstraction has 6834 states and 37581 transitions. [2021-10-13 19:53:34,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 37581 transitions. [2021-10-13 19:53:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:34,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:34,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:34,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:34,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:34,423 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash -285583026, now seen corresponding path program 12 times [2021-10-13 19:53:34,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:34,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605061831] [2021-10-13 19:53:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:53:34,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:34,427 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:34,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-13 19:53:35,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:53:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:36,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:36,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:36,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605061831] [2021-10-13 19:53:36,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605061831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:36,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:36,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:36,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29232902] [2021-10-13 19:53:36,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:36,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:36,456 INFO L87 Difference]: Start difference. First operand 6834 states and 37581 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:37,028 INFO L93 Difference]: Finished difference Result 7722 states and 41282 transitions. [2021-10-13 19:53:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:53:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:37,062 INFO L225 Difference]: With dead ends: 7722 [2021-10-13 19:53:37,063 INFO L226 Difference]: Without dead ends: 7616 [2021-10-13 19:53:37,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2021-10-13 19:53:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7040. [2021-10-13 19:53:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7040 states, 7039 states have (on average 5.513425202443529) internal successors, (38809), 7039 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7040 states to 7040 states and 38809 transitions. [2021-10-13 19:53:37,352 INFO L78 Accepts]: Start accepts. Automaton has 7040 states and 38809 transitions. Word has length 25 [2021-10-13 19:53:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 7040 states and 38809 transitions. [2021-10-13 19:53:37,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7040 states and 38809 transitions. [2021-10-13 19:53:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:37,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:37,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:37,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:37,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:37,579 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1145428195, now seen corresponding path program 15 times [2021-10-13 19:53:37,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:37,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769483693] [2021-10-13 19:53:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:53:37,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:37,582 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:37,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-13 19:53:38,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:53:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:39,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:39,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:39,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769483693] [2021-10-13 19:53:39,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769483693] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:39,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:39,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:39,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596072672] [2021-10-13 19:53:39,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:39,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:39,619 INFO L87 Difference]: Start difference. First operand 7040 states and 38809 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:42,968 INFO L93 Difference]: Finished difference Result 7764 states and 41377 transitions. [2021-10-13 19:53:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:43,000 INFO L225 Difference]: With dead ends: 7764 [2021-10-13 19:53:43,000 INFO L226 Difference]: Without dead ends: 7714 [2021-10-13 19:53:43,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:53:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-10-13 19:53:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7218. [2021-10-13 19:53:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 5.488152972149092) internal successors, (39608), 7217 states have internal predecessors, (39608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 39608 transitions. [2021-10-13 19:53:43,321 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 39608 transitions. Word has length 25 [2021-10-13 19:53:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:43,321 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 39608 transitions. [2021-10-13 19:53:43,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 39608 transitions. [2021-10-13 19:53:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:43,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:43,342 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:43,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:43,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:43,543 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash -49015474, now seen corresponding path program 13 times [2021-10-13 19:53:43,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:43,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870477563] [2021-10-13 19:53:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:53:43,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:43,546 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:43,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-13 19:53:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:53:44,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:44,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:45,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:45,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870477563] [2021-10-13 19:53:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870477563] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:45,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:45,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:45,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944374589] [2021-10-13 19:53:45,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:45,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:45,673 INFO L87 Difference]: Start difference. First operand 7218 states and 39608 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:46,410 INFO L93 Difference]: Finished difference Result 8958 states and 47159 transitions. [2021-10-13 19:53:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:46,447 INFO L225 Difference]: With dead ends: 8958 [2021-10-13 19:53:46,447 INFO L226 Difference]: Without dead ends: 8856 [2021-10-13 19:53:46,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-10-13 19:53:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 7396. [2021-10-13 19:53:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 5.515483434753212) internal successors, (40787), 7395 states have internal predecessors, (40787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 40787 transitions. [2021-10-13 19:53:46,683 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 40787 transitions. Word has length 25 [2021-10-13 19:53:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:46,683 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 40787 transitions. [2021-10-13 19:53:46,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 40787 transitions. [2021-10-13 19:53:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:46,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:46,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:46,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:46,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:46,907 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1456101346, now seen corresponding path program 14 times [2021-10-13 19:53:46,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:46,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264920606] [2021-10-13 19:53:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:53:46,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:46,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:46,911 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-13 19:53:48,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:53:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:48,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:48,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:49,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:49,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264920606] [2021-10-13 19:53:49,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264920606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:49,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:49,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:49,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858166705] [2021-10-13 19:53:49,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:49,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:49,091 INFO L87 Difference]: Start difference. First operand 7396 states and 40787 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:49,786 INFO L93 Difference]: Finished difference Result 9206 states and 48617 transitions. [2021-10-13 19:53:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:49,827 INFO L225 Difference]: With dead ends: 9206 [2021-10-13 19:53:49,827 INFO L226 Difference]: Without dead ends: 9090 [2021-10-13 19:53:49,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-10-13 19:53:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 7558. [2021-10-13 19:53:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7557 states have (on average 5.5475717877464605) internal successors, (41923), 7557 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 41923 transitions. [2021-10-13 19:53:50,099 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 41923 transitions. Word has length 25 [2021-10-13 19:53:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:50,099 INFO L470 AbstractCegarLoop]: Abstraction has 7558 states and 41923 transitions. [2021-10-13 19:53:50,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 41923 transitions. [2021-10-13 19:53:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:50,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:50,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:50,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-10-13 19:53:50,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:50,324 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash -440653278, now seen corresponding path program 15 times [2021-10-13 19:53:50,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:50,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769016030] [2021-10-13 19:53:50,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:53:50,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:50,328 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:50,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-13 19:53:51,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:53:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:52,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:52,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:52,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769016030] [2021-10-13 19:53:52,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769016030] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:52,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:52,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:52,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496914745] [2021-10-13 19:53:52,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:52,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:52,681 INFO L87 Difference]: Start difference. First operand 7558 states and 41923 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:53,637 INFO L93 Difference]: Finished difference Result 9396 states and 50193 transitions. [2021-10-13 19:53:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:53,682 INFO L225 Difference]: With dead ends: 9396 [2021-10-13 19:53:53,682 INFO L226 Difference]: Without dead ends: 9298 [2021-10-13 19:53:53,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2021-10-13 19:53:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 7800. [2021-10-13 19:53:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 7799 states have (on average 5.5802025900756504) internal successors, (43520), 7799 states have internal predecessors, (43520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 43520 transitions. [2021-10-13 19:53:54,034 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 43520 transitions. Word has length 25 [2021-10-13 19:53:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:54,034 INFO L470 AbstractCegarLoop]: Abstraction has 7800 states and 43520 transitions. [2021-10-13 19:53:54,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 43520 transitions. [2021-10-13 19:53:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 19:53:54,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:54,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:54,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:54,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:54,283 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1421711502, now seen corresponding path program 16 times [2021-10-13 19:53:54,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:54,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537451120] [2021-10-13 19:53:54,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:53:54,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:54,285 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:54,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-13 19:53:55,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:53:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:53:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:56,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:56,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537451120] [2021-10-13 19:53:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537451120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:56,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:53:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637366771] [2021-10-13 19:53:56,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:56,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:56,515 INFO L87 Difference]: Start difference. First operand 7800 states and 43520 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:57,534 INFO L93 Difference]: Finished difference Result 9728 states and 52163 transitions. [2021-10-13 19:53:57,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:57,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 19:53:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:57,676 INFO L225 Difference]: With dead ends: 9728 [2021-10-13 19:53:57,676 INFO L226 Difference]: Without dead ends: 9614 [2021-10-13 19:53:57,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9614 states. [2021-10-13 19:53:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9614 to 8028. [2021-10-13 19:53:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8028 states, 8027 states have (on average 5.618412856608945) internal successors, (45099), 8027 states have internal predecessors, (45099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8028 states to 8028 states and 45099 transitions. [2021-10-13 19:53:57,944 INFO L78 Accepts]: Start accepts. Automaton has 8028 states and 45099 transitions. Word has length 25 [2021-10-13 19:53:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:57,945 INFO L470 AbstractCegarLoop]: Abstraction has 8028 states and 45099 transitions. [2021-10-13 19:53:57,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8028 states and 45099 transitions. [2021-10-13 19:53:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:53:57,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:57,968 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:57,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:58,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:58,169 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:53:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:58,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1124655685, now seen corresponding path program 16 times [2021-10-13 19:53:58,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:58,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630519107] [2021-10-13 19:53:58,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:53:58,171 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:58,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:58,173 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:58,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-13 19:53:59,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:53:59,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:53:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:59,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:59,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:59,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630519107] [2021-10-13 19:53:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630519107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:59,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:59,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:53:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406654491] [2021-10-13 19:53:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:53:59,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:53:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:53:59,798 INFO L87 Difference]: Start difference. First operand 8028 states and 45099 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:54:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:03,335 INFO L93 Difference]: Finished difference Result 14062 states and 74071 transitions. [2021-10-13 19:54:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:54:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 26 [2021-10-13 19:54:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:03,399 INFO L225 Difference]: With dead ends: 14062 [2021-10-13 19:54:03,399 INFO L226 Difference]: Without dead ends: 14062 [2021-10-13 19:54:03,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:54:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14062 states. [2021-10-13 19:54:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14062 to 9532. [2021-10-13 19:54:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 5.616724373098311) internal successors, (53533), 9531 states have internal predecessors, (53533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 53533 transitions. [2021-10-13 19:54:03,939 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 53533 transitions. Word has length 26 [2021-10-13 19:54:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:03,939 INFO L470 AbstractCegarLoop]: Abstraction has 9532 states and 53533 transitions. [2021-10-13 19:54:03,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:54:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 53533 transitions. [2021-10-13 19:54:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:54:03,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:03,968 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:03,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:04,170 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:54:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:04,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1593287420, now seen corresponding path program 17 times [2021-10-13 19:54:04,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:04,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817018254] [2021-10-13 19:54:04,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:54:04,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:04,173 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:04,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-13 19:54:05,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:54:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:54:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:05,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:05,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:05,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817018254] [2021-10-13 19:54:05,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817018254] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:05,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:05,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:54:05,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861530688] [2021-10-13 19:54:05,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:54:05,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:54:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:54:05,998 INFO L87 Difference]: Start difference. First operand 9532 states and 53533 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:54:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:08,309 INFO L93 Difference]: Finished difference Result 14414 states and 73597 transitions. [2021-10-13 19:54:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:54:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 26 [2021-10-13 19:54:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:08,372 INFO L225 Difference]: With dead ends: 14414 [2021-10-13 19:54:08,372 INFO L226 Difference]: Without dead ends: 14066 [2021-10-13 19:54:08,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:54:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14066 states. [2021-10-13 19:54:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14066 to 10202. [2021-10-13 19:54:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 5.5932751691010685) internal successors, (57057), 10201 states have internal predecessors, (57057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 57057 transitions. [2021-10-13 19:54:08,927 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 57057 transitions. Word has length 26 [2021-10-13 19:54:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:08,928 INFO L470 AbstractCegarLoop]: Abstraction has 10202 states and 57057 transitions. [2021-10-13 19:54:08,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:54:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 57057 transitions. [2021-10-13 19:54:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:54:08,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:08,958 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:08,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:09,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:09,159 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:54:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1122520063, now seen corresponding path program 18 times [2021-10-13 19:54:09,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:09,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124680367] [2021-10-13 19:54:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:54:09,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:09,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:09,162 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:09,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-13 19:54:10,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:54:10,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:54:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:10,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:11,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:11,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124680367] [2021-10-13 19:54:11,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124680367] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:11,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:11,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 19:54:11,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947482200] [2021-10-13 19:54:11,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:54:11,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:54:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:54:11,147 INFO L87 Difference]: Start difference. First operand 10202 states and 57057 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-10-13 19:54:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:18,407 INFO L93 Difference]: Finished difference Result 20750 states and 107018 transitions. [2021-10-13 19:54:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:54:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 26 [2021-10-13 19:54:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:18,520 INFO L225 Difference]: With dead ends: 20750 [2021-10-13 19:54:18,520 INFO L226 Difference]: Without dead ends: 20734 [2021-10-13 19:54:18,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4552.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:54:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20734 states. [2021-10-13 19:54:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20734 to 11850. [2021-10-13 19:54:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 5.656933074521056) internal successors, (67029), 11849 states have internal predecessors, (67029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 67029 transitions. [2021-10-13 19:54:19,162 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 67029 transitions. Word has length 26 [2021-10-13 19:54:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:19,162 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 67029 transitions. [2021-10-13 19:54:19,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-10-13 19:54:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 67029 transitions. [2021-10-13 19:54:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:54:19,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:19,197 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:19,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:19,398 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:54:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -101816990, now seen corresponding path program 19 times [2021-10-13 19:54:19,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:19,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252005645] [2021-10-13 19:54:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:54:19,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:19,401 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:19,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-13 19:54:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:54:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:54:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:20,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:21,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:21,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252005645] [2021-10-13 19:54:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252005645] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:21,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:54:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849772830] [2021-10-13 19:54:21,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:54:21,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:54:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:54:21,248 INFO L87 Difference]: Start difference. First operand 11850 states and 67029 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:54:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:33,597 INFO L93 Difference]: Finished difference Result 18598 states and 97230 transitions. [2021-10-13 19:54:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:54:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 26 [2021-10-13 19:54:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:33,687 INFO L225 Difference]: With dead ends: 18598 [2021-10-13 19:54:33,687 INFO L226 Difference]: Without dead ends: 18366 [2021-10-13 19:54:33,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:54:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18366 states. [2021-10-13 19:54:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18366 to 12778. [2021-10-13 19:54:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 5.7114346090631605) internal successors, (72975), 12777 states have internal predecessors, (72975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 72975 transitions. [2021-10-13 19:54:34,327 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 72975 transitions. Word has length 26 [2021-10-13 19:54:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:34,327 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 72975 transitions. [2021-10-13 19:54:34,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:54:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 72975 transitions. [2021-10-13 19:54:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:54:34,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:34,376 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:34,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:34,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:34,586 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:54:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash -917914939, now seen corresponding path program 20 times [2021-10-13 19:54:34,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:34,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237321978] [2021-10-13 19:54:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:54:34,588 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:34,590 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:34,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-13 19:54:35,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:54:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:54:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:36,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:36,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:36,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237321978] [2021-10-13 19:54:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237321978] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:36,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:54:36,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248393130] [2021-10-13 19:54:36,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:54:36,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:54:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:54:36,759 INFO L87 Difference]: Start difference. First operand 12778 states and 72975 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:54:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:53,395 INFO L93 Difference]: Finished difference Result 27650 states and 141230 transitions. [2021-10-13 19:54:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 19:54:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 26 [2021-10-13 19:54:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:53,684 INFO L225 Difference]: With dead ends: 27650 [2021-10-13 19:54:53,684 INFO L226 Difference]: Without dead ends: 27650 [2021-10-13 19:54:53,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1908.7ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 19:54:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27650 states. [2021-10-13 19:54:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27650 to 14908. [2021-10-13 19:54:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14908 states, 14907 states have (on average 5.8145166700207955) internal successors, (86677), 14907 states have internal predecessors, (86677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14908 states to 14908 states and 86677 transitions. [2021-10-13 19:54:54,718 INFO L78 Accepts]: Start accepts. Automaton has 14908 states and 86677 transitions. Word has length 26 [2021-10-13 19:54:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:54,718 INFO L470 AbstractCegarLoop]: Abstraction has 14908 states and 86677 transitions. [2021-10-13 19:54:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:54:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14908 states and 86677 transitions. [2021-10-13 19:54:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:54:54,782 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:54,782 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:54,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:54,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:54,997 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:54:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash 639031620, now seen corresponding path program 21 times [2021-10-13 19:54:54,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:54,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462385902] [2021-10-13 19:54:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:54:54,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:55,000 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:55,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-13 19:54:56,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:54:56,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:54:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:57,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:57,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462385902] [2021-10-13 19:54:57,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462385902] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:57,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:57,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 19:54:57,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77623519] [2021-10-13 19:54:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:54:57,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:54:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:54:57,039 INFO L87 Difference]: Start difference. First operand 14908 states and 86677 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-10-13 19:55:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:09,950 INFO L93 Difference]: Finished difference Result 28680 states and 149028 transitions. [2021-10-13 19:55:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 19:55:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 26 [2021-10-13 19:55:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:10,235 INFO L225 Difference]: With dead ends: 28680 [2021-10-13 19:55:10,235 INFO L226 Difference]: Without dead ends: 28620 [2021-10-13 19:55:10,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3324.4ms TimeCoverageRelationStatistics Valid=391, Invalid=2059, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 19:55:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28620 states. [2021-10-13 19:55:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28620 to 16428. [2021-10-13 19:55:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16428 states, 16427 states have (on average 5.831009922688257) internal successors, (95786), 16427 states have internal predecessors, (95786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16428 states to 16428 states and 95786 transitions. [2021-10-13 19:55:11,441 INFO L78 Accepts]: Start accepts. Automaton has 16428 states and 95786 transitions. Word has length 26 [2021-10-13 19:55:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 16428 states and 95786 transitions. [2021-10-13 19:55:11,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-10-13 19:55:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 16428 states and 95786 transitions. [2021-10-13 19:55:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:55:11,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:11,753 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:11,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-10-13 19:55:11,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:55:11,954 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:55:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 385835298, now seen corresponding path program 22 times [2021-10-13 19:55:11,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:11,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982859540] [2021-10-13 19:55:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:55:11,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:11,957 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:55:11,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-13 19:55:13,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:55:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:55:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:55:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:13,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:13,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:13,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982859540] [2021-10-13 19:55:13,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982859540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:13,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:13,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:55:13,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781501516] [2021-10-13 19:55:13,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:55:13,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:55:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:55:13,800 INFO L87 Difference]: Start difference. First operand 16428 states and 95786 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:55:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:20,558 INFO L93 Difference]: Finished difference Result 27094 states and 144512 transitions. [2021-10-13 19:55:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:55:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 26 [2021-10-13 19:55:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:20,715 INFO L225 Difference]: With dead ends: 27094 [2021-10-13 19:55:20,715 INFO L226 Difference]: Without dead ends: 27094 [2021-10-13 19:55:20,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:55:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27094 states. [2021-10-13 19:55:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27094 to 17910. [2021-10-13 19:55:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17910 states, 17909 states have (on average 5.858339382433414) internal successors, (104917), 17909 states have internal predecessors, (104917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17910 states to 17910 states and 104917 transitions. [2021-10-13 19:55:22,354 INFO L78 Accepts]: Start accepts. Automaton has 17910 states and 104917 transitions. Word has length 26 [2021-10-13 19:55:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:22,354 INFO L470 AbstractCegarLoop]: Abstraction has 17910 states and 104917 transitions. [2021-10-13 19:55:22,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:55:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17910 states and 104917 transitions. [2021-10-13 19:55:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:55:22,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:22,426 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:22,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-13 19:55:22,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:55:22,627 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:55:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2046910233, now seen corresponding path program 23 times [2021-10-13 19:55:22,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:22,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969909219] [2021-10-13 19:55:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:55:22,629 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:22,630 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:55:22,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-13 19:55:23,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:55:23,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:55:23,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:55:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:26,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:26,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969909219] [2021-10-13 19:55:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969909219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:26,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:26,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:55:26,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188923458] [2021-10-13 19:55:26,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:55:26,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:55:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2021-10-13 19:55:26,530 INFO L87 Difference]: Start difference. First operand 17910 states and 104917 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:55:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:38,244 INFO L93 Difference]: Finished difference Result 28024 states and 150029 transitions. [2021-10-13 19:55:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:55:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 26 [2021-10-13 19:55:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:38,432 INFO L225 Difference]: With dead ends: 28024 [2021-10-13 19:55:38,432 INFO L226 Difference]: Without dead ends: 27924 [2021-10-13 19:55:38,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 9196.6ms TimeCoverageRelationStatistics Valid=162, Invalid=648, Unknown=2, NotChecked=0, Total=812 [2021-10-13 19:55:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27924 states. [2021-10-13 19:55:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27924 to 18928. [2021-10-13 19:55:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18928 states, 18927 states have (on average 5.912981455064194) internal successors, (111915), 18927 states have internal predecessors, (111915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18928 states to 18928 states and 111915 transitions. [2021-10-13 19:55:39,669 INFO L78 Accepts]: Start accepts. Automaton has 18928 states and 111915 transitions. Word has length 26 [2021-10-13 19:55:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:39,669 INFO L470 AbstractCegarLoop]: Abstraction has 18928 states and 111915 transitions. [2021-10-13 19:55:39,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:55:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18928 states and 111915 transitions. [2021-10-13 19:55:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:55:39,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:39,929 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:39,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-13 19:55:40,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:55:40,137 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:55:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2045413883, now seen corresponding path program 24 times [2021-10-13 19:55:40,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:40,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949766375] [2021-10-13 19:55:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:55:40,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:40,140 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:55:40,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-13 19:55:41,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:55:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:55:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:55:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:44,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:44,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949766375] [2021-10-13 19:55:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949766375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:44,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 19:55:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968860469] [2021-10-13 19:55:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:55:44,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:55:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2021-10-13 19:55:44,443 INFO L87 Difference]: Start difference. First operand 18928 states and 111915 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-10-13 19:56:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:03,510 INFO L93 Difference]: Finished difference Result 39542 states and 207824 transitions. [2021-10-13 19:56:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 19:56:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 26 [2021-10-13 19:56:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:03,909 INFO L225 Difference]: With dead ends: 39542 [2021-10-13 19:56:03,910 INFO L226 Difference]: Without dead ends: 39542 [2021-10-13 19:56:03,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 11685.5ms TimeCoverageRelationStatistics Valid=400, Invalid=1578, Unknown=2, NotChecked=0, Total=1980 [2021-10-13 19:56:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39542 states. [2021-10-13 19:56:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39542 to 21230. [2021-10-13 19:56:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21230 states, 21229 states have (on average 6.001083423618635) internal successors, (127397), 21229 states have internal predecessors, (127397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21230 states to 21230 states and 127397 transitions. [2021-10-13 19:56:05,805 INFO L78 Accepts]: Start accepts. Automaton has 21230 states and 127397 transitions. Word has length 26 [2021-10-13 19:56:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 21230 states and 127397 transitions. [2021-10-13 19:56:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-10-13 19:56:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21230 states and 127397 transitions. [2021-10-13 19:56:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:56:05,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:05,901 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:05,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:06,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:06,117 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:56:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -488467324, now seen corresponding path program 25 times [2021-10-13 19:56:06,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:06,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334942741] [2021-10-13 19:56:06,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:56:06,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:06,121 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:06,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-13 19:56:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:56:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:56:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:10,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:10,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334942741] [2021-10-13 19:56:10,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334942741] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:10,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:10,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:56:10,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704336667] [2021-10-13 19:56:10,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:56:10,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:56:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-10-13 19:56:10,133 INFO L87 Difference]: Start difference. First operand 21230 states and 127397 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:56:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:18,924 INFO L93 Difference]: Finished difference Result 30600 states and 169777 transitions. [2021-10-13 19:56:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:56:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 26 [2021-10-13 19:56:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:19,357 INFO L225 Difference]: With dead ends: 30600 [2021-10-13 19:56:19,357 INFO L226 Difference]: Without dead ends: 30534 [2021-10-13 19:56:19,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6825.7ms TimeCoverageRelationStatistics Valid=127, Invalid=471, Unknown=2, NotChecked=0, Total=600 [2021-10-13 19:56:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-10-13 19:56:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 22722. [2021-10-13 19:56:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22722 states, 22721 states have (on average 6.040447163417103) internal successors, (137245), 22721 states have internal predecessors, (137245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22722 states to 22722 states and 137245 transitions. [2021-10-13 19:56:20,814 INFO L78 Accepts]: Start accepts. Automaton has 22722 states and 137245 transitions. Word has length 26 [2021-10-13 19:56:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:20,814 INFO L470 AbstractCegarLoop]: Abstraction has 22722 states and 137245 transitions. [2021-10-13 19:56:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-10-13 19:56:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22722 states and 137245 transitions. [2021-10-13 19:56:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:56:20,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:20,892 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:20,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:21,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:21,106 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:56:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1122180228, now seen corresponding path program 26 times [2021-10-13 19:56:21,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:21,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940739401] [2021-10-13 19:56:21,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:56:21,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:21,109 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:21,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-13 19:56:22,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:56:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:56:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:25,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:25,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940739401] [2021-10-13 19:56:25,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940739401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:25,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:25,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:56:25,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861573527] [2021-10-13 19:56:25,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:56:25,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:56:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-10-13 19:56:25,360 INFO L87 Difference]: Start difference. First operand 22722 states and 137245 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:56:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:35,648 INFO L93 Difference]: Finished difference Result 33222 states and 186487 transitions. [2021-10-13 19:56:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:56:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 26 [2021-10-13 19:56:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:35,942 INFO L225 Difference]: With dead ends: 33222 [2021-10-13 19:56:35,942 INFO L226 Difference]: Without dead ends: 33208 [2021-10-13 19:56:35,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6832.1ms TimeCoverageRelationStatistics Valid=107, Invalid=443, Unknown=2, NotChecked=0, Total=552 [2021-10-13 19:56:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33208 states. [2021-10-13 19:56:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33208 to 24258. [2021-10-13 19:56:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24258 states, 24257 states have (on average 6.066372593478171) internal successors, (147152), 24257 states have internal predecessors, (147152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 147152 transitions. [2021-10-13 19:56:37,724 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 147152 transitions. Word has length 26 [2021-10-13 19:56:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:37,725 INFO L470 AbstractCegarLoop]: Abstraction has 24258 states and 147152 transitions. [2021-10-13 19:56:37,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-10-13 19:56:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 147152 transitions. [2021-10-13 19:56:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:56:37,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:37,855 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:37,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:38,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:38,065 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:56:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash -283862200, now seen corresponding path program 27 times [2021-10-13 19:56:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:38,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737862913] [2021-10-13 19:56:38,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:56:38,067 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:38,068 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:38,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-13 19:56:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:56:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:56:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:40,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:40,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:40,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737862913] [2021-10-13 19:56:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737862913] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:40,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:40,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 19:56:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093101607] [2021-10-13 19:56:40,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:56:40,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:56:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:56:40,545 INFO L87 Difference]: Start difference. First operand 24258 states and 147152 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-10-13 19:56:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:46,003 INFO L93 Difference]: Finished difference Result 41194 states and 230803 transitions. [2021-10-13 19:56:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:56:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 26 [2021-10-13 19:56:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:46,318 INFO L225 Difference]: With dead ends: 41194 [2021-10-13 19:56:46,319 INFO L226 Difference]: Without dead ends: 41194 [2021-10-13 19:56:46,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1877.3ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:56:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41194 states. [2021-10-13 19:56:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41194 to 27712. [2021-10-13 19:56:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27712 states, 27711 states have (on average 6.139800079390856) internal successors, (170140), 27711 states have internal predecessors, (170140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27712 states to 27712 states and 170140 transitions. [2021-10-13 19:56:48,091 INFO L78 Accepts]: Start accepts. Automaton has 27712 states and 170140 transitions. Word has length 26 [2021-10-13 19:56:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:48,091 INFO L470 AbstractCegarLoop]: Abstraction has 27712 states and 170140 transitions. [2021-10-13 19:56:48,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-10-13 19:56:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27712 states and 170140 transitions. [2021-10-13 19:56:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:56:48,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:48,187 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:48,455 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forcibly destroying the process [2021-10-13 19:56:48,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:48,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:48,457 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:56:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1591098390, now seen corresponding path program 17 times [2021-10-13 19:56:48,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:48,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752509459] [2021-10-13 19:56:48,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:56:48,458 WARN L724 oredProcess$PipePump]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] The stream was forcibly closed: stdIn [2021-10-13 19:56:48,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:48,460 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:48,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-13 19:56:49,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:56:49,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:56:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:50,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:50,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752509459] [2021-10-13 19:56:50,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752509459] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:50,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:50,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:56:50,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901545510] [2021-10-13 19:56:50,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:56:50,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:56:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:56:50,624 INFO L87 Difference]: Start difference. First operand 27712 states and 170140 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:53,302 INFO L93 Difference]: Finished difference Result 44110 states and 250836 transitions. [2021-10-13 19:56:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:56:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:56:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:53,640 INFO L225 Difference]: With dead ends: 44110 [2021-10-13 19:56:53,640 INFO L226 Difference]: Without dead ends: 44020 [2021-10-13 19:56:53,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1167.5ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:56:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44020 states. [2021-10-13 19:56:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44020 to 33900. [2021-10-13 19:56:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33900 states, 33899 states have (on average 6.102687394908404) internal successors, (206875), 33899 states have internal predecessors, (206875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33900 states to 33900 states and 206875 transitions. [2021-10-13 19:56:55,791 INFO L78 Accepts]: Start accepts. Automaton has 33900 states and 206875 transitions. Word has length 26 [2021-10-13 19:56:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:55,792 INFO L470 AbstractCegarLoop]: Abstraction has 33900 states and 206875 transitions. [2021-10-13 19:56:55,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33900 states and 206875 transitions. [2021-10-13 19:56:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:56:56,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:56,294 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:56,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:56,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:56,507 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:56:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash 111623758, now seen corresponding path program 18 times [2021-10-13 19:56:56,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:56,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122068542] [2021-10-13 19:56:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:56:56,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:56,511 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:56,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-13 19:56:57,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:56:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:56:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:58,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:58,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:58,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122068542] [2021-10-13 19:56:58,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122068542] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:58,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:58,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 19:56:58,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666342834] [2021-10-13 19:56:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:56:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:56:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:56:58,802 INFO L87 Difference]: Start difference. First operand 33900 states and 206875 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:03,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:57:03,497 INFO L93 Difference]: Finished difference Result 56956 states and 321861 transitions. [2021-10-13 19:57:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:57:03,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:57:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:57:04,036 INFO L225 Difference]: With dead ends: 56956 [2021-10-13 19:57:04,036 INFO L226 Difference]: Without dead ends: 55174 [2021-10-13 19:57:04,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2477.3ms TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:57:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55174 states. [2021-10-13 19:57:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55174 to 40568. [2021-10-13 19:57:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40568 states, 40567 states have (on average 6.005792885843173) internal successors, (243637), 40567 states have internal predecessors, (243637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40568 states to 40568 states and 243637 transitions. [2021-10-13 19:57:07,094 INFO L78 Accepts]: Start accepts. Automaton has 40568 states and 243637 transitions. Word has length 26 [2021-10-13 19:57:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:57:07,094 INFO L470 AbstractCegarLoop]: Abstraction has 40568 states and 243637 transitions. [2021-10-13 19:57:07,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 40568 states and 243637 transitions. [2021-10-13 19:57:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:57:07,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:57:07,250 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:57:07,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-10-13 19:57:07,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:57:07,451 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:57:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:57:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1499317200, now seen corresponding path program 19 times [2021-10-13 19:57:07,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:57:07,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051106990] [2021-10-13 19:57:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:57:07,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:57:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:57:07,456 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:57:07,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-10-13 19:57:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:57:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:57:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:57:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:09,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:57:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:09,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:57:09,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051106990] [2021-10-13 19:57:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051106990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:57:09,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:57:09,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:57:09,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771247879] [2021-10-13 19:57:09,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:57:09,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:57:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:57:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:57:09,938 INFO L87 Difference]: Start difference. First operand 40568 states and 243637 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:57:27,380 INFO L93 Difference]: Finished difference Result 59230 states and 336524 transitions. [2021-10-13 19:57:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:57:27,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:57:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:57:27,832 INFO L225 Difference]: With dead ends: 59230 [2021-10-13 19:57:27,832 INFO L226 Difference]: Without dead ends: 58302 [2021-10-13 19:57:27,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:57:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58302 states. [2021-10-13 19:57:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58302 to 43322. [2021-10-13 19:57:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43322 states, 43321 states have (on average 6.071535744788902) internal successors, (263025), 43321 states have internal predecessors, (263025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43322 states to 43322 states and 263025 transitions. [2021-10-13 19:57:30,923 INFO L78 Accepts]: Start accepts. Automaton has 43322 states and 263025 transitions. Word has length 26 [2021-10-13 19:57:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:57:30,924 INFO L470 AbstractCegarLoop]: Abstraction has 43322 states and 263025 transitions. [2021-10-13 19:57:30,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43322 states and 263025 transitions. [2021-10-13 19:57:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:57:31,096 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:57:31,099 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:57:31,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-10-13 19:57:31,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:57:31,315 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:57:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:57:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1880745292, now seen corresponding path program 20 times [2021-10-13 19:57:31,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:57:31,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319914561] [2021-10-13 19:57:31,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:57:31,317 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:57:31,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:57:31,318 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:57:31,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-10-13 19:57:33,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:57:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:57:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:57:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:57:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:33,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:57:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:33,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:57:33,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319914561] [2021-10-13 19:57:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319914561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:57:33,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:57:33,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:57:33,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482652975] [2021-10-13 19:57:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:57:33,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:57:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:57:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:57:33,766 INFO L87 Difference]: Start difference. First operand 43322 states and 263025 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:58:04,040 INFO L93 Difference]: Finished difference Result 85640 states and 493540 transitions. [2021-10-13 19:58:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:58:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:58:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:58:04,798 INFO L225 Difference]: With dead ends: 85640 [2021-10-13 19:58:04,798 INFO L226 Difference]: Without dead ends: 85612 [2021-10-13 19:58:04,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1771.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 19:58:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85612 states. [2021-10-13 19:58:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85612 to 50848. [2021-10-13 19:58:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 6.24296418667768) internal successors, (317436), 50847 states have internal predecessors, (317436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 317436 transitions. [2021-10-13 19:58:09,045 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 317436 transitions. Word has length 26 [2021-10-13 19:58:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:58:09,046 INFO L470 AbstractCegarLoop]: Abstraction has 50848 states and 317436 transitions. [2021-10-13 19:58:09,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 317436 transitions. [2021-10-13 19:58:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:58:09,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:58:09,271 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:58:09,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-10-13 19:58:09,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:58:09,486 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:58:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:58:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1163647628, now seen corresponding path program 21 times [2021-10-13 19:58:09,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:58:09,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200177579] [2021-10-13 19:58:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:58:09,488 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:58:09,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:58:09,489 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:58:09,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-10-13 19:58:10,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:58:10,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:58:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:58:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:58:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:11,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:58:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:12,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:58:12,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200177579] [2021-10-13 19:58:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200177579] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:58:12,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:58:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 19:58:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922806356] [2021-10-13 19:58:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:58:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:58:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:58:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:58:12,033 INFO L87 Difference]: Start difference. First operand 50848 states and 317436 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:58:25,146 INFO L93 Difference]: Finished difference Result 81778 states and 478832 transitions. [2021-10-13 19:58:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:58:25,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:58:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:58:25,794 INFO L225 Difference]: With dead ends: 81778 [2021-10-13 19:58:25,794 INFO L226 Difference]: Without dead ends: 81738 [2021-10-13 19:58:25,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1901.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:58:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81738 states. [2021-10-13 19:58:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81738 to 57180. [2021-10-13 19:58:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57180 states, 57179 states have (on average 6.343097990520995) internal successors, (362692), 57179 states have internal predecessors, (362692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57180 states to 57180 states and 362692 transitions. [2021-10-13 19:58:30,102 INFO L78 Accepts]: Start accepts. Automaton has 57180 states and 362692 transitions. Word has length 26 [2021-10-13 19:58:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:58:30,102 INFO L470 AbstractCegarLoop]: Abstraction has 57180 states and 362692 transitions. [2021-10-13 19:58:30,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 57180 states and 362692 transitions. [2021-10-13 19:58:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:58:30,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:58:30,350 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:58:30,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-10-13 19:58:30,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:58:30,551 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:58:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:58:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1420111714, now seen corresponding path program 22 times [2021-10-13 19:58:30,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:58:30,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609976060] [2021-10-13 19:58:30,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:58:30,552 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:58:30,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:58:30,553 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:58:30,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-10-13 19:58:32,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:58:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:58:32,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:58:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:58:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:32,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:58:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:32,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:58:32,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609976060] [2021-10-13 19:58:32,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609976060] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:58:32,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:58:32,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:58:32,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347648229] [2021-10-13 19:58:32,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:58:32,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:58:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:58:32,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:58:32,921 INFO L87 Difference]: Start difference. First operand 57180 states and 362692 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:58:44,594 INFO L93 Difference]: Finished difference Result 104282 states and 611864 transitions. [2021-10-13 19:58:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 19:58:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:58:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:58:46,091 INFO L225 Difference]: With dead ends: 104282 [2021-10-13 19:58:46,091 INFO L226 Difference]: Without dead ends: 104254 [2021-10-13 19:58:46,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2418.4ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 19:58:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104254 states. [2021-10-13 19:58:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104254 to 68002. [2021-10-13 19:58:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68002 states, 68001 states have (on average 6.432243643475831) internal successors, (437399), 68001 states have internal predecessors, (437399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68002 states to 68002 states and 437399 transitions. [2021-10-13 19:58:51,862 INFO L78 Accepts]: Start accepts. Automaton has 68002 states and 437399 transitions. Word has length 26 [2021-10-13 19:58:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:58:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 68002 states and 437399 transitions. [2021-10-13 19:58:51,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 68002 states and 437399 transitions. [2021-10-13 19:58:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:58:52,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:58:52,729 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:58:52,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2021-10-13 19:58:52,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:58:52,943 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:58:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:58:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash 52454310, now seen corresponding path program 23 times [2021-10-13 19:58:52,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:58:52,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663794583] [2021-10-13 19:58:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:58:52,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:58:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:58:52,949 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:58:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-10-13 19:58:54,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:58:54,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:58:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:58:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:58:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:54,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:58:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:55,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:58:55,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663794583] [2021-10-13 19:58:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663794583] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:58:55,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:58:55,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 19:58:55,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781870161] [2021-10-13 19:58:55,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:58:55,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:58:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:58:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:58:55,448 INFO L87 Difference]: Start difference. First operand 68002 states and 437399 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:01,902 INFO L93 Difference]: Finished difference Result 95286 states and 574339 transitions. [2021-10-13 19:59:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 19:59:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:59:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:03,250 INFO L225 Difference]: With dead ends: 95286 [2021-10-13 19:59:03,251 INFO L226 Difference]: Without dead ends: 94334 [2021-10-13 19:59:03,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2150.2ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:59:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94334 states. [2021-10-13 19:59:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94334 to 71336. [2021-10-13 19:59:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71336 states, 71335 states have (on average 6.435003855050116) internal successors, (459041), 71335 states have internal predecessors, (459041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71336 states to 71336 states and 459041 transitions. [2021-10-13 19:59:08,763 INFO L78 Accepts]: Start accepts. Automaton has 71336 states and 459041 transitions. Word has length 26 [2021-10-13 19:59:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 71336 states and 459041 transitions. [2021-10-13 19:59:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 71336 states and 459041 transitions. [2021-10-13 19:59:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 19:59:09,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:09,102 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:09,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:09,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:59:09,316 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 19:59:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2000948958, now seen corresponding path program 24 times [2021-10-13 19:59:09,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:09,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954970842] [2021-10-13 19:59:09,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:59:09,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:09,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:09,320 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:59:09,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-10-13 19:59:11,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:59:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:59:11,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:59:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:59:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:59:12,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:12,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954970842] [2021-10-13 19:59:12,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954970842] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:12,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:12,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 19:59:12,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523738583] [2021-10-13 19:59:12,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:59:12,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:59:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:59:12,543 INFO L87 Difference]: Start difference. First operand 71336 states and 459041 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:24,113 INFO L93 Difference]: Finished difference Result 112678 states and 679283 transitions. [2021-10-13 19:59:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:59:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 19:59:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:25,924 INFO L225 Difference]: With dead ends: 112678 [2021-10-13 19:59:25,924 INFO L226 Difference]: Without dead ends: 112642 [2021-10-13 19:59:25,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4291.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 19:59:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112642 states. [2021-10-13 19:59:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112642 to 82058. [2021-10-13 19:59:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82058 states, 82057 states have (on average 6.471464957285789) internal successors, (531029), 82057 states have internal predecessors, (531029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)