./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:00:05,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:00:05,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:00:05,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:00:05,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:00:05,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:00:05,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:00:05,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:00:05,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:00:05,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:00:05,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:00:05,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:00:05,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:00:05,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:00:05,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:00:05,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:00:05,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:00:05,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:00:05,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:00:05,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:00:05,809 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:00:05,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:00:05,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:00:05,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:00:05,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:00:05,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:00:05,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:00:05,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:00:05,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:00:05,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:00:05,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:00:05,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:00:05,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:00:05,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:00:05,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:00:05,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:00:05,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:00:05,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:00:05,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:00:05,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:00:05,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:00:05,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:00:05,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:00:05,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:00:05,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:00:05,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:00:05,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:00:05,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:00:05,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:00:05,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:00:05,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:00:05,854 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:00:05,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:00:05,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:00:05,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:00:05,856 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:00:05,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:00:05,856 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:00:05,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:00:05,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:00:05,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:00:05,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:00:05,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:00:05,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:00:05,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:00:05,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:00:05,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-07-13 22:00:06,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:00:06,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:00:06,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:00:06,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:00:06,074 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:00:06,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-13 22:00:06,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363d170d6/3306c1b1242341f99d7c85ed759ee212/FLAGf727caa40 [2022-07-13 22:00:06,475 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:00:06,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-13 22:00:06,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363d170d6/3306c1b1242341f99d7c85ed759ee212/FLAGf727caa40 [2022-07-13 22:00:06,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363d170d6/3306c1b1242341f99d7c85ed759ee212 [2022-07-13 22:00:06,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:00:06,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:00:06,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:00:06,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:00:06,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:00:06,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a78e254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06, skipping insertion in model container [2022-07-13 22:00:06,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:00:06,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:00:06,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-07-13 22:00:06,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:00:06,664 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:00:06,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-07-13 22:00:06,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:00:06,688 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:00:06,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06 WrapperNode [2022-07-13 22:00:06,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:00:06,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:00:06,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:00:06,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:00:06,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,713 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-13 22:00:06,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:00:06,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:00:06,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:00:06,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:00:06,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:00:06,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:00:06,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:00:06,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:00:06,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (1/1) ... [2022-07-13 22:00:06,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:00:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:06,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:00:06,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:00:06,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:00:06,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:00:06,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:00:06,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:00:06,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:00:06,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:00:06,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:00:06,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:00:06,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:00:06,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:00:06,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:00:06,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:00:06,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:00:06,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:00:06,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:00:06,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:00:06,790 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:00:06,845 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:00:06,846 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:00:07,048 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:00:07,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:00:07,055 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 22:00:07,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:00:07 BoogieIcfgContainer [2022-07-13 22:00:07,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:00:07,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:00:07,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:00:07,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:00:07,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:00:06" (1/3) ... [2022-07-13 22:00:07,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718f7227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:00:07, skipping insertion in model container [2022-07-13 22:00:07,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:00:06" (2/3) ... [2022-07-13 22:00:07,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718f7227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:00:07, skipping insertion in model container [2022-07-13 22:00:07,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:00:07" (3/3) ... [2022-07-13 22:00:07,062 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-07-13 22:00:07,066 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:00:07,072 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:00:07,072 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:00:07,072 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:00:07,136 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:00:07,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-07-13 22:00:07,249 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2022-07-13 22:00:07,249 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:00:07,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-07-13 22:00:07,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-07-13 22:00:07,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-07-13 22:00:07,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:00:07,282 INFO L357 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@343120a1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b577cb [2022-07-13 22:00:07,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 22:00:07,319 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2022-07-13 22:00:07,320 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:00:07,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:07,321 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:07,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -315421393, now seen corresponding path program 1 times [2022-07-13 22:00:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:07,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768962767] [2022-07-13 22:00:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:07,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768962767] [2022-07-13 22:00:07,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768962767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:07,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:07,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:00:07,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805663255] [2022-07-13 22:00:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:07,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:00:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:00:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:00:07,633 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2022-07-13 22:00:07,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:07,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:07,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2022-07-13 22:00:07,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:07,680 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2022-07-13 22:00:07,680 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 22:00:07,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2022-07-13 22:00:07,683 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2022-07-13 22:00:07,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2022-07-13 22:00:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:00:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:00:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-13 22:00:07,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2022-07-13 22:00:07,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-13 22:00:07,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-13 22:00:07,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:07,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-13 22:00:07,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:07,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:07,724 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:07,726 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2022-07-13 22:00:07,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2022-07-13 22:00:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 22:00:07,734 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2022-07-13 22:00:07,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2022-07-13 22:00:07,739 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-07-13 22:00:07,739 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2022-07-13 22:00:07,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:07,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:07,740 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:07,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:00:07,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1566756150, now seen corresponding path program 1 times [2022-07-13 22:00:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:07,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353156488] [2022-07-13 22:00:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:07,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353156488] [2022-07-13 22:00:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353156488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:08,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:00:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388438888] [2022-07-13 22:00:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:08,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:00:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:00:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:00:08,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2022-07-13 22:00:08,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:08,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:08,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2022-07-13 22:00:08,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:08,979 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2022-07-13 22:00:08,979 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2022-07-13 22:00:08,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52427 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2022-07-13 22:00:09,047 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2022-07-13 22:00:09,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2022-07-13 22:00:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:00:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:00:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2022-07-13 22:00:09,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2022-07-13 22:00:09,050 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2022-07-13 22:00:09,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2022-07-13 22:00:09,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:09,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2022-07-13 22:00:09,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:09,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:09,054 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:09,054 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2022-07-13 22:00:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2022-07-13 22:00:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:00:09,058 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2022-07-13 22:00:09,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2022-07-13 22:00:09,059 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-07-13 22:00:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2022-07-13 22:00:09,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:09,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:09,060 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:09,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:00:09,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2022-07-13 22:00:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052060284] [2022-07-13 22:00:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052060284] [2022-07-13 22:00:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052060284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603310010] [2022-07-13 22:00:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:09,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:09,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:00:09,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:00:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:00:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:09,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:09,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603310010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:09,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:09,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 22:00:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26078019] [2022-07-13 22:00:09,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:09,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:00:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:00:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:00:09,936 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:09,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:09,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:09,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:09,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:11,388 INFO L129 PetriNetUnfolder]: 9819/14701 cut-off events. [2022-07-13 22:00:11,388 INFO L130 PetriNetUnfolder]: For 2287/2361 co-relation queries the response was YES. [2022-07-13 22:00:11,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31278 conditions, 14701 events. 9819/14701 cut-off events. For 2287/2361 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 94613 event pairs, 1381 based on Foata normal form. 2/12471 useless extension candidates. Maximal degree in co-relation 31271. Up to 6565 conditions per place. [2022-07-13 22:00:11,524 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 181 selfloop transitions, 26 changer transitions 1/270 dead transitions. [2022-07-13 22:00:11,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 270 transitions, 1086 flow [2022-07-13 22:00:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:00:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:00:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-13 22:00:11,527 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-13 22:00:11,527 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-13 22:00:11,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-13 22:00:11,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:11,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-13 22:00:11,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:11,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:11,534 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:11,534 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 14 states and 1306 transitions. [2022-07-13 22:00:11,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 270 transitions, 1086 flow [2022-07-13 22:00:11,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 1063 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-13 22:00:11,541 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 434 flow [2022-07-13 22:00:11,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=434, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2022-07-13 22:00:11,543 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-07-13 22:00:11,543 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 434 flow [2022-07-13 22:00:11,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:11,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:11,544 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:11,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:11,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:11,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash -291748005, now seen corresponding path program 2 times [2022-07-13 22:00:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166711983] [2022-07-13 22:00:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:11,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:11,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166711983] [2022-07-13 22:00:11,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166711983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:11,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:11,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:00:11,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816802106] [2022-07-13 22:00:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:00:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:00:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:00:11,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:11,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:11,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:11,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:11,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:13,114 INFO L129 PetriNetUnfolder]: 9701/14987 cut-off events. [2022-07-13 22:00:13,115 INFO L130 PetriNetUnfolder]: For 20337/20370 co-relation queries the response was YES. [2022-07-13 22:00:13,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40057 conditions, 14987 events. 9701/14987 cut-off events. For 20337/20370 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 99177 event pairs, 5925 based on Foata normal form. 35/13578 useless extension candidates. Maximal degree in co-relation 40044. Up to 12875 conditions per place. [2022-07-13 22:00:13,226 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2022-07-13 22:00:13,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 742 flow [2022-07-13 22:00:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:00:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:00:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-13 22:00:13,228 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-13 22:00:13,228 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-13 22:00:13,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-13 22:00:13,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:13,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-13 22:00:13,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:13,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:13,231 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:13,231 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 434 flow. Second operand 6 states and 550 transitions. [2022-07-13 22:00:13,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 742 flow [2022-07-13 22:00:13,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 158 transitions, 727 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:00:13,247 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 502 flow [2022-07-13 22:00:13,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2022-07-13 22:00:13,248 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2022-07-13 22:00:13,248 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 502 flow [2022-07-13 22:00:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:13,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:13,249 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:13,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:00:13,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 38846005, now seen corresponding path program 1 times [2022-07-13 22:00:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161737639] [2022-07-13 22:00:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161737639] [2022-07-13 22:00:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161737639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832914356] [2022-07-13 22:00:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:13,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:13,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:00:13,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:00:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:00:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:13,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:13,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832914356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:13,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:13,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 22:00:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576504123] [2022-07-13 22:00:13,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:00:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:00:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:00:13,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:13,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 502 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:13,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:13,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:13,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:16,109 INFO L129 PetriNetUnfolder]: 15341/24600 cut-off events. [2022-07-13 22:00:16,109 INFO L130 PetriNetUnfolder]: For 39084/39167 co-relation queries the response was YES. [2022-07-13 22:00:16,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66755 conditions, 24600 events. 15341/24600 cut-off events. For 39084/39167 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 183614 event pairs, 2068 based on Foata normal form. 2/22703 useless extension candidates. Maximal degree in co-relation 66739. Up to 10037 conditions per place. [2022-07-13 22:00:16,347 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 255 selfloop transitions, 30 changer transitions 1/348 dead transitions. [2022-07-13 22:00:16,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 348 transitions, 2165 flow [2022-07-13 22:00:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:00:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:00:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-13 22:00:16,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-13 22:00:16,351 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-13 22:00:16,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-13 22:00:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-13 22:00:16,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:16,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:16,357 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:16,357 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 502 flow. Second operand 14 states and 1306 transitions. [2022-07-13 22:00:16,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 348 transitions, 2165 flow [2022-07-13 22:00:16,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 348 transitions, 2090 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-13 22:00:16,392 INFO L242 Difference]: Finished difference. Result has 160 places, 152 transitions, 677 flow [2022-07-13 22:00:16,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=677, PETRI_PLACES=160, PETRI_TRANSITIONS=152} [2022-07-13 22:00:16,394 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 37 predicate places. [2022-07-13 22:00:16,395 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 152 transitions, 677 flow [2022-07-13 22:00:16,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:16,395 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:16,395 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:16,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:16,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1609667139, now seen corresponding path program 2 times [2022-07-13 22:00:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:16,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924322269] [2022-07-13 22:00:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:16,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924322269] [2022-07-13 22:00:16,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924322269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:16,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:16,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:00:16,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837870111] [2022-07-13 22:00:16,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:16,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:00:16,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:00:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:00:16,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:16,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 152 transitions, 677 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:16,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:16,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:16,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:18,874 INFO L129 PetriNetUnfolder]: 15101/23111 cut-off events. [2022-07-13 22:00:18,875 INFO L130 PetriNetUnfolder]: For 50097/50148 co-relation queries the response was YES. [2022-07-13 22:00:18,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77177 conditions, 23111 events. 15101/23111 cut-off events. For 50097/50148 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 161465 event pairs, 7081 based on Foata normal form. 21/22936 useless extension candidates. Maximal degree in co-relation 77153. Up to 20415 conditions per place. [2022-07-13 22:00:19,059 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 95 selfloop transitions, 17 changer transitions 8/182 dead transitions. [2022-07-13 22:00:19,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 182 transitions, 1127 flow [2022-07-13 22:00:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:00:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:00:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-13 22:00:19,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-13 22:00:19,062 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-13 22:00:19,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-13 22:00:19,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:19,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-13 22:00:19,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:19,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:19,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:19,065 INFO L186 Difference]: Start difference. First operand has 160 places, 152 transitions, 677 flow. Second operand 6 states and 550 transitions. [2022-07-13 22:00:19,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 182 transitions, 1127 flow [2022-07-13 22:00:19,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 182 transitions, 1119 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-13 22:00:19,186 INFO L242 Difference]: Finished difference. Result has 164 places, 156 transitions, 774 flow [2022-07-13 22:00:19,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=164, PETRI_TRANSITIONS=156} [2022-07-13 22:00:19,187 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 41 predicate places. [2022-07-13 22:00:19,187 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 156 transitions, 774 flow [2022-07-13 22:00:19,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:19,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:19,188 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:19,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:00:19,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905056, now seen corresponding path program 1 times [2022-07-13 22:00:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490604073] [2022-07-13 22:00:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:19,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490604073] [2022-07-13 22:00:19,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490604073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:19,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:19,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:00:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118179813] [2022-07-13 22:00:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:00:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:00:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:00:19,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:19,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 156 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:19,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:19,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:19,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:21,493 INFO L129 PetriNetUnfolder]: 16638/25497 cut-off events. [2022-07-13 22:00:21,493 INFO L130 PetriNetUnfolder]: For 65358/65421 co-relation queries the response was YES. [2022-07-13 22:00:21,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86692 conditions, 25497 events. 16638/25497 cut-off events. For 65358/65421 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 179760 event pairs, 8095 based on Foata normal form. 480/25661 useless extension candidates. Maximal degree in co-relation 86665. Up to 16663 conditions per place. [2022-07-13 22:00:21,745 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 21 changer transitions 2/217 dead transitions. [2022-07-13 22:00:21,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1451 flow [2022-07-13 22:00:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:00:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:00:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-13 22:00:21,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-13 22:00:21,747 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-13 22:00:21,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-13 22:00:21,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:21,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-13 22:00:21,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 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) [2022-07-13 22:00:21,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:21,751 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:21,751 INFO L186 Difference]: Start difference. First operand has 164 places, 156 transitions, 774 flow. Second operand 7 states and 649 transitions. [2022-07-13 22:00:21,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1451 flow [2022-07-13 22:00:21,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1412 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-13 22:00:21,884 INFO L242 Difference]: Finished difference. Result has 169 places, 157 transitions, 816 flow [2022-07-13 22:00:21,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=816, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2022-07-13 22:00:21,885 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 46 predicate places. [2022-07-13 22:00:21,885 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 816 flow [2022-07-13 22:00:21,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:21,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:21,885 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:21,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:00:21,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2065430376, now seen corresponding path program 1 times [2022-07-13 22:00:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:21,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288476489] [2022-07-13 22:00:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288476489] [2022-07-13 22:00:22,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288476489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:22,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:22,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:00:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840757692] [2022-07-13 22:00:22,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:22,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:00:22,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:00:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:00:22,020 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-13 22:00:22,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:22,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:22,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-13 22:00:22,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:24,459 INFO L129 PetriNetUnfolder]: 18218/27769 cut-off events. [2022-07-13 22:00:24,459 INFO L130 PetriNetUnfolder]: For 80925/80966 co-relation queries the response was YES. [2022-07-13 22:00:24,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99125 conditions, 27769 events. 18218/27769 cut-off events. For 80925/80966 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 195341 event pairs, 9843 based on Foata normal form. 488/27942 useless extension candidates. Maximal degree in co-relation 99097. Up to 19090 conditions per place. [2022-07-13 22:00:24,728 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2022-07-13 22:00:24,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 1531 flow [2022-07-13 22:00:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:00:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:00:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-13 22:00:24,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-13 22:00:24,730 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-13 22:00:24,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-13 22:00:24,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:24,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-13 22:00:24,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 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) [2022-07-13 22:00:24,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:24,733 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:24,733 INFO L186 Difference]: Start difference. First operand has 169 places, 157 transitions, 816 flow. Second operand 7 states and 649 transitions. [2022-07-13 22:00:24,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 1531 flow [2022-07-13 22:00:24,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1506 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:00:24,872 INFO L242 Difference]: Finished difference. Result has 173 places, 158 transitions, 870 flow [2022-07-13 22:00:24,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-07-13 22:00:24,873 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2022-07-13 22:00:24,873 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 870 flow [2022-07-13 22:00:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:24,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:24,873 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:24,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:00:24,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:00:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1961029637, now seen corresponding path program 1 times [2022-07-13 22:00:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085768074] [2022-07-13 22:00:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:26,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085768074] [2022-07-13 22:00:26,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085768074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424954264] [2022-07-13 22:00:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:26,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:26,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:00:26,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process