./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/popl20-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:45:58,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:45:58,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:45:58,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:45:58,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:45:58,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:45:58,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:45:58,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:45:58,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:45:58,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:45:58,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:45:58,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:45:58,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:45:58,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:45:58,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:45:58,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:45:58,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:45:58,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:45:58,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:45:58,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:45:58,716 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:45:58,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:45:58,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:45:58,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:45:58,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:45:58,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:45:58,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:45:58,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:45:58,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:45:58,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:45:58,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:45:58,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:45:58,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:45:58,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:45:58,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:45:58,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:45:58,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:45:58,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:45:58,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:45:58,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:45:58,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:45:58,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:45:58,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:45:58,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:45:58,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:45:58,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:45:58,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:45:58,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:45:58,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:45:58,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:45:58,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:45:58,746 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:45:58,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:45:58,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:45:58,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:45:58,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:45:58,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:45:58,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:45:58,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:45:58,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:45:58,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:45:58,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:45:58,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:45:58,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:45:58,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:45:58,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:45:58,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:45:58,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:45:58,750 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:45:58,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:45:58,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:45:58,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-07-22 21:45:58,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:45:58,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:45:58,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:45:58,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:45:58,957 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:45:58,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-22 21:45:58,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57689d5a6/3853ec1cd07b4422920a83f59a9848b2/FLAG496285017 [2022-07-22 21:45:59,368 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:45:59,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-22 21:45:59,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57689d5a6/3853ec1cd07b4422920a83f59a9848b2/FLAG496285017 [2022-07-22 21:45:59,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57689d5a6/3853ec1cd07b4422920a83f59a9848b2 [2022-07-22 21:45:59,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:45:59,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:45:59,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:59,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:45:59,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:45:59,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f0c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59, skipping insertion in model container [2022-07-22 21:45:59,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:45:59,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:45:59,912 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/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-07-22 21:45:59,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:59,924 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:45:59,936 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/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-07-22 21:45:59,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:59,949 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:45:59,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59 WrapperNode [2022-07-22 21:45:59,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:59,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:59,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:45:59,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:45:59,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,975 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-07-22 21:45:59,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:59,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:45:59,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:45:59,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:45:59,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:45:59,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:45:59,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:45:59,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:45:59,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:45:59,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (1/1) ... [2022-07-22 21:46:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:46:00,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:00,028 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) [2022-07-22 21:46:00,030 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 [2022-07-22 21:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:46:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:46:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:46:00,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:46:00,073 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:46:00,128 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:46:00,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:46:00,327 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:46:00,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:46:00,392 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:46:00,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:46:00 BoogieIcfgContainer [2022-07-22 21:46:00,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:46:00,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:46:00,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:46:00,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:46:00,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:45:59" (1/3) ... [2022-07-22 21:46:00,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ea389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:46:00, skipping insertion in model container [2022-07-22 21:46:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:59" (2/3) ... [2022-07-22 21:46:00,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ea389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:46:00, skipping insertion in model container [2022-07-22 21:46:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:46:00" (3/3) ... [2022-07-22 21:46:00,402 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-07-22 21:46:00,405 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:46:00,411 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:46:00,412 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:46:00,412 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:46:00,458 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:46:00,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-07-22 21:46:00,550 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2022-07-22 21:46:00,552 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:46:00,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-07-22 21:46:00,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-07-22 21:46:00,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-07-22 21:46:00,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:46:00,574 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@4a264fa1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4447325b [2022-07-22 21:46:00,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:46:00,599 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2022-07-22 21:46:00,599 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:46:00,599 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:00,600 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] [2022-07-22 21:46:00,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1997616241, now seen corresponding path program 1 times [2022-07-22 21:46:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:00,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900844774] [2022-07-22 21:46:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:00,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900844774] [2022-07-22 21:46:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900844774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:00,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:00,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:46:00,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924588520] [2022-07-22 21:46:00,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:46:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:46:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:46:00,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2022-07-22 21:46:00,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:00,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2022-07-22 21:46:00,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:00,874 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2022-07-22 21:46:00,878 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-22 21:46:00,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2022-07-22 21:46:00,880 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2022-07-22 21:46:00,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2022-07-22 21:46:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:46:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:46:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2022-07-22 21:46:00,891 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2022-07-22 21:46:00,892 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2022-07-22 21:46:00,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2022-07-22 21:46:00,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:00,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2022-07-22 21:46:00,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,902 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,903 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2022-07-22 21:46:00,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2022-07-22 21:46:00,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:00,910 INFO L242 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2022-07-22 21:46:00,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-07-22 21:46:00,915 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-07-22 21:46:00,915 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2022-07-22 21:46:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:00,916 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] [2022-07-22 21:46:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:46:00,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2022-07-22 21:46:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:00,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787386269] [2022-07-22 21:46:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787386269] [2022-07-22 21:46:01,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787386269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:01,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:01,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:46:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426738031] [2022-07-22 21:46:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:46:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:46:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:46:01,144 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2022-07-22 21:46:01,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2022-07-22 21:46:01,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:01,221 INFO L129 PetriNetUnfolder]: 13/150 cut-off events. [2022-07-22 21:46:01,221 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-07-22 21:46:01,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2022-07-22 21:46:01,222 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2022-07-22 21:46:01,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2022-07-22 21:46:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:46:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:46:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2022-07-22 21:46:01,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-07-22 21:46:01,238 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2022-07-22 21:46:01,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2022-07-22 21:46:01,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:01,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2022-07-22 21:46:01,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,243 INFO L186 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2022-07-22 21:46:01,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2022-07-22 21:46:01,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:46:01,245 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2022-07-22 21:46:01,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-07-22 21:46:01,246 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-07-22 21:46:01,246 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2022-07-22 21:46:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,247 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] [2022-07-22 21:46:01,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:46:01,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1430434687, now seen corresponding path program 1 times [2022-07-22 21:46:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150930711] [2022-07-22 21:46:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150930711] [2022-07-22 21:46:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150930711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:01,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:01,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:46:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645384295] [2022-07-22 21:46:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:46:01,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-22 21:46:01,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-22 21:46:01,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:01,436 INFO L129 PetriNetUnfolder]: 83/368 cut-off events. [2022-07-22 21:46:01,436 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-22 21:46:01,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1527 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2022-07-22 21:46:01,439 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-07-22 21:46:01,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2022-07-22 21:46:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:46:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:46:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-07-22 21:46:01,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2022-07-22 21:46:01,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-07-22 21:46:01,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-07-22 21:46:01,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:01,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-07-22 21:46:01,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,448 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2022-07-22 21:46:01,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2022-07-22 21:46:01,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:46:01,451 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2022-07-22 21:46:01,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2022-07-22 21:46:01,452 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2022-07-22 21:46:01,452 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2022-07-22 21:46:01,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,453 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] [2022-07-22 21:46:01,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:46:01,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,454 INFO L85 PathProgramCache]: Analyzing trace with hash -852119249, now seen corresponding path program 1 times [2022-07-22 21:46:01,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111258423] [2022-07-22 21:46:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:01,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111258423] [2022-07-22 21:46:01,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111258423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:01,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:01,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:46:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849954032] [2022-07-22 21:46:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:46:01,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-22 21:46:01,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-22 21:46:01,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:01,686 INFO L129 PetriNetUnfolder]: 67/286 cut-off events. [2022-07-22 21:46:01,686 INFO L130 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2022-07-22 21:46:01,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1018 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2022-07-22 21:46:01,690 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2022-07-22 21:46:01,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2022-07-22 21:46:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:46:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:46:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2022-07-22 21:46:01,692 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2022-07-22 21:46:01,692 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2022-07-22 21:46:01,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2022-07-22 21:46:01,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:01,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2022-07-22 21:46:01,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,700 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,700 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2022-07-22 21:46:01,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2022-07-22 21:46:01,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:01,705 INFO L242 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2022-07-22 21:46:01,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2022-07-22 21:46:01,707 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-22 21:46:01,709 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2022-07-22 21:46:01,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,709 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] [2022-07-22 21:46:01,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:46:01,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2022-07-22 21:46:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727010566] [2022-07-22 21:46:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727010566] [2022-07-22 21:46:01,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727010566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453497974] [2022-07-22 21:46:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:01,831 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) [2022-07-22 21:46:01,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:46:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:46:01,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453497974] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:02,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:02,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:46:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215668026] [2022-07-22 21:46:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:02,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-22 21:46:02,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:02,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-22 21:46:02,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:02,316 INFO L129 PetriNetUnfolder]: 58/226 cut-off events. [2022-07-22 21:46:02,316 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-07-22 21:46:02,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 641 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2022-07-22 21:46:02,318 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2022-07-22 21:46:02,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2022-07-22 21:46:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:46:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:46:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-22 21:46:02,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-22 21:46:02,320 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:02,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,323 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,323 INFO L186 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2022-07-22 21:46:02,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2022-07-22 21:46:02,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-22 21:46:02,326 INFO L242 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2022-07-22 21:46:02,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2022-07-22 21:46:02,329 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2022-07-22 21:46:02,330 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2022-07-22 21:46:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:02,330 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] [2022-07-22 21:46:02,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:02,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:02,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1354192604, now seen corresponding path program 1 times [2022-07-22 21:46:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:02,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468425690] [2022-07-22 21:46:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468425690] [2022-07-22 21:46:02,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468425690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125683843] [2022-07-22 21:46:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:02,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:02,646 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) [2022-07-22 21:46:02,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:46:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:46:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125683843] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:02,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:02,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:46:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211824147] [2022-07-22 21:46:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:02,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-22 21:46:02,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:02,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-22 21:46:02,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:02,954 INFO L129 PetriNetUnfolder]: 46/209 cut-off events. [2022-07-22 21:46:02,954 INFO L130 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2022-07-22 21:46:02,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 523 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2022-07-22 21:46:02,955 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2022-07-22 21:46:02,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2022-07-22 21:46:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:46:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:46:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-22 21:46:02,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-22 21:46:02,958 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:02,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-22 21:46:02,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,960 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,960 INFO L186 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2022-07-22 21:46:02,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2022-07-22 21:46:02,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:02,963 INFO L242 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2022-07-22 21:46:02,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2022-07-22 21:46:02,963 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-22 21:46:02,963 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2022-07-22 21:46:02,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:02,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:02,964 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] [2022-07-22 21:46:02,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:46:03,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 62640818, now seen corresponding path program 1 times [2022-07-22 21:46:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428559759] [2022-07-22 21:46:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:03,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428559759] [2022-07-22 21:46:03,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428559759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941732048] [2022-07-22 21:46:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:03,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:03,408 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) [2022-07-22 21:46:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:46:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 21:46:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:03,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:03,612 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:46:03,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:46:03,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:46:03,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:03,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:03,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:46:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:04,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:46:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941732048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:04,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:04,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 9] total 30 [2022-07-22 21:46:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624643659] [2022-07-22 21:46:04,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 21:46:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 21:46:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:46:04,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-22 21:46:04,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:04,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:04,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-22 21:46:04,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:05,037 INFO L129 PetriNetUnfolder]: 325/771 cut-off events. [2022-07-22 21:46:05,037 INFO L130 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-07-22 21:46:05,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 771 events. 325/771 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3846 event pairs, 99 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 1859. Up to 330 conditions per place. [2022-07-22 21:46:05,041 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 90 selfloop transitions, 29 changer transitions 4/162 dead transitions. [2022-07-22 21:46:05,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 162 transitions, 727 flow [2022-07-22 21:46:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:46:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:46:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1112 transitions. [2022-07-22 21:46:05,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.432012432012432 [2022-07-22 21:46:05,044 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1112 transitions. [2022-07-22 21:46:05,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1112 transitions. [2022-07-22 21:46:05,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:05,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1112 transitions. [2022-07-22 21:46:05,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 50.54545454545455) internal successors, (1112), 22 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,050 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,051 INFO L186 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 22 states and 1112 transitions. [2022-07-22 21:46:05,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 162 transitions, 727 flow [2022-07-22 21:46:05,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 162 transitions, 709 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:46:05,056 INFO L242 Difference]: Finished difference. Result has 138 places, 118 transitions, 425 flow [2022-07-22 21:46:05,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=425, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2022-07-22 21:46:05,056 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 34 predicate places. [2022-07-22 21:46:05,056 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 425 flow [2022-07-22 21:46:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:05,057 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] [2022-07-22 21:46:05,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:46:05,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:05,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -618781634, now seen corresponding path program 2 times [2022-07-22 21:46:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82621895] [2022-07-22 21:46:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:05,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82621895] [2022-07-22 21:46:05,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82621895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645010757] [2022-07-22 21:46:05,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:05,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:05,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:05,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:46:05,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-22 21:46:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:05,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:05,734 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:46:05,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:46:05,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:46:05,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:06,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-22 21:46:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:06,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:06,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-22 21:46:06,210 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-22 21:46:06,216 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= 0 (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-07-22 21:46:06,222 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-22 21:46:06,245 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ c_~counter~0 (* (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) (- 1)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-22 21:46:06,252 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-22 21:46:06,256 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 0)) is different from false [2022-07-22 21:46:06,274 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:06,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-22 21:46:06,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 140 [2022-07-22 21:46:06,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 132 [2022-07-22 21:46:06,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 124 [2022-07-22 21:46:06,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:46:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-22 21:46:06,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645010757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:06,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:06,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 38 [2022-07-22 21:46:06,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020882822] [2022-07-22 21:46:06,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 21:46:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 21:46:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=829, Unknown=7, NotChecked=448, Total=1406 [2022-07-22 21:46:06,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-22 21:46:06,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 425 flow. Second operand has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:06,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:06,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-22 21:46:06,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:07,709 INFO L129 PetriNetUnfolder]: 471/1065 cut-off events. [2022-07-22 21:46:07,709 INFO L130 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2022-07-22 21:46:07,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 1065 events. 471/1065 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6186 event pairs, 49 based on Foata normal form. 1/1055 useless extension candidates. Maximal degree in co-relation 2931. Up to 352 conditions per place. [2022-07-22 21:46:07,715 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 104 selfloop transitions, 49 changer transitions 4/196 dead transitions. [2022-07-22 21:46:07,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 196 transitions, 1052 flow [2022-07-22 21:46:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:46:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:46:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1313 transitions. [2022-07-22 21:46:07,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-07-22 21:46:07,719 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1313 transitions. [2022-07-22 21:46:07,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1313 transitions. [2022-07-22 21:46:07,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:07,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1313 transitions. [2022-07-22 21:46:07,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 50.5) internal successors, (1313), 26 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:07,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:07,726 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:07,726 INFO L186 Difference]: Start difference. First operand has 138 places, 118 transitions, 425 flow. Second operand 26 states and 1313 transitions. [2022-07-22 21:46:07,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 196 transitions, 1052 flow [2022-07-22 21:46:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 976 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-22 21:46:07,731 INFO L242 Difference]: Finished difference. Result has 151 places, 138 transitions, 619 flow [2022-07-22 21:46:07,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=619, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2022-07-22 21:46:07,733 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2022-07-22 21:46:07,733 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 619 flow [2022-07-22 21:46:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:07,734 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:07,734 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] [2022-07-22 21:46:07,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:07,950 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1246130652, now seen corresponding path program 3 times [2022-07-22 21:46:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096096792] [2022-07-22 21:46:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:07,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096096792] [2022-07-22 21:46:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096096792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987709946] [2022-07-22 21:46:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:46:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:08,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:08,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:46:08,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:46:08,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:46:08,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:08,601 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:08,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-22 21:46:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987709946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:08,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:08,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 8] total 26 [2022-07-22 21:46:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047387608] [2022-07-22 21:46:08,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 21:46:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 21:46:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-07-22 21:46:08,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:08,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 619 flow. Second operand has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:08,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:08,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:08,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:09,262 INFO L129 PetriNetUnfolder]: 586/1308 cut-off events. [2022-07-22 21:46:09,263 INFO L130 PetriNetUnfolder]: For 1953/1953 co-relation queries the response was YES. [2022-07-22 21:46:09,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 1308 events. 586/1308 cut-off events. For 1953/1953 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8300 event pairs, 146 based on Foata normal form. 1/1294 useless extension candidates. Maximal degree in co-relation 3787. Up to 784 conditions per place. [2022-07-22 21:46:09,270 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 112 selfloop transitions, 31 changer transitions 4/189 dead transitions. [2022-07-22 21:46:09,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 189 transitions, 1122 flow [2022-07-22 21:46:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:46:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:46:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1173 transitions. [2022-07-22 21:46:09,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4557109557109557 [2022-07-22 21:46:09,273 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1173 transitions. [2022-07-22 21:46:09,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1173 transitions. [2022-07-22 21:46:09,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:09,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1173 transitions. [2022-07-22 21:46:09,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.31818181818182) internal successors, (1173), 22 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:09,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:09,280 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:09,280 INFO L186 Difference]: Start difference. First operand has 151 places, 138 transitions, 619 flow. Second operand 22 states and 1173 transitions. [2022-07-22 21:46:09,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 189 transitions, 1122 flow [2022-07-22 21:46:09,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 1028 flow, removed 32 selfloop flow, removed 14 redundant places. [2022-07-22 21:46:09,286 INFO L242 Difference]: Finished difference. Result has 161 places, 148 transitions, 693 flow [2022-07-22 21:46:09,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=693, PETRI_PLACES=161, PETRI_TRANSITIONS=148} [2022-07-22 21:46:09,287 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 57 predicate places. [2022-07-22 21:46:09,287 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 148 transitions, 693 flow [2022-07-22 21:46:09,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:09,288 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:09,288 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] [2022-07-22 21:46:09,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:09,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:09,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:09,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1270727132, now seen corresponding path program 4 times [2022-07-22 21:46:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055983927] [2022-07-22 21:46:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:09,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055983927] [2022-07-22 21:46:09,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055983927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500951581] [2022-07-22 21:46:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:46:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:09,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:09,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:46:09,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:46:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 21:46:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:09,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:46:10,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:10,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500951581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:10,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:10,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2022-07-22 21:46:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402926949] [2022-07-22 21:46:10,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 21:46:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 21:46:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-22 21:46:10,326 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:10,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 148 transitions, 693 flow. Second operand has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:10,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:10,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:10,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:10,990 INFO L129 PetriNetUnfolder]: 701/1574 cut-off events. [2022-07-22 21:46:10,990 INFO L130 PetriNetUnfolder]: For 2197/2197 co-relation queries the response was YES. [2022-07-22 21:46:10,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 1574 events. 701/1574 cut-off events. For 2197/2197 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10496 event pairs, 231 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 4489. Up to 806 conditions per place. [2022-07-22 21:46:11,000 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 115 selfloop transitions, 45 changer transitions 4/206 dead transitions. [2022-07-22 21:46:11,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 1261 flow [2022-07-22 21:46:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:46:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:46:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1275 transitions. [2022-07-22 21:46:11,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45405982905982906 [2022-07-22 21:46:11,004 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1275 transitions. [2022-07-22 21:46:11,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1275 transitions. [2022-07-22 21:46:11,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:11,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1275 transitions. [2022-07-22 21:46:11,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 53.125) internal successors, (1275), 24 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:11,011 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:11,011 INFO L186 Difference]: Start difference. First operand has 161 places, 148 transitions, 693 flow. Second operand 24 states and 1275 transitions. [2022-07-22 21:46:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 1261 flow [2022-07-22 21:46:11,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 1195 flow, removed 11 selfloop flow, removed 16 redundant places. [2022-07-22 21:46:11,018 INFO L242 Difference]: Finished difference. Result has 169 places, 161 transitions, 840 flow [2022-07-22 21:46:11,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=840, PETRI_PLACES=169, PETRI_TRANSITIONS=161} [2022-07-22 21:46:11,019 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 65 predicate places. [2022-07-22 21:46:11,020 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 161 transitions, 840 flow [2022-07-22 21:46:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:11,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:11,020 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] [2022-07-22 21:46:11,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:11,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:11,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1059485982, now seen corresponding path program 5 times [2022-07-22 21:46:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:11,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406784088] [2022-07-22 21:46:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:11,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406784088] [2022-07-22 21:46:11,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406784088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712967596] [2022-07-22 21:46:11,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:46:11,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:11,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:11,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:11,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:46:11,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 21:46:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:11,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:46:11,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:11,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712967596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:12,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 28 [2022-07-22 21:46:12,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956116173] [2022-07-22 21:46:12,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:12,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 21:46:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 21:46:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:46:12,093 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:12,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 161 transitions, 840 flow. Second operand has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:12,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:12,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:12,819 INFO L129 PetriNetUnfolder]: 831/1856 cut-off events. [2022-07-22 21:46:12,819 INFO L130 PetriNetUnfolder]: For 3366/3366 co-relation queries the response was YES. [2022-07-22 21:46:12,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 1856 events. 831/1856 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12821 event pairs, 244 based on Foata normal form. 1/1842 useless extension candidates. Maximal degree in co-relation 5556. Up to 832 conditions per place. [2022-07-22 21:46:12,831 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 120 selfloop transitions, 61 changer transitions 4/227 dead transitions. [2022-07-22 21:46:12,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 1523 flow [2022-07-22 21:46:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:46:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:46:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1380 transitions. [2022-07-22 21:46:12,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4536489151873767 [2022-07-22 21:46:12,835 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1380 transitions. [2022-07-22 21:46:12,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1380 transitions. [2022-07-22 21:46:12,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:12,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1380 transitions. [2022-07-22 21:46:12,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.07692307692308) internal successors, (1380), 26 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,844 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,844 INFO L186 Difference]: Start difference. First operand has 169 places, 161 transitions, 840 flow. Second operand 26 states and 1380 transitions. [2022-07-22 21:46:12,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 1523 flow [2022-07-22 21:46:12,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 1396 flow, removed 45 selfloop flow, removed 16 redundant places. [2022-07-22 21:46:12,854 INFO L242 Difference]: Finished difference. Result has 179 places, 177 transitions, 1020 flow [2022-07-22 21:46:12,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1020, PETRI_PLACES=179, PETRI_TRANSITIONS=177} [2022-07-22 21:46:12,855 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 75 predicate places. [2022-07-22 21:46:12,855 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 177 transitions, 1020 flow [2022-07-22 21:46:12,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:12,856 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:12,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:13,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -836879962, now seen corresponding path program 6 times [2022-07-22 21:46:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:13,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019273365] [2022-07-22 21:46:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019273365] [2022-07-22 21:46:13,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019273365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456337542] [2022-07-22 21:46:13,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:46:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:13,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:13,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:46:13,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:46:13,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:46:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:13,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:13,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456337542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:13,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:13,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-22 21:46:13,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972632634] [2022-07-22 21:46:13,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:13,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:46:13,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:46:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:46:13,529 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-22 21:46:13,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 177 transitions, 1020 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:13,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:13,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-22 21:46:13,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:13,876 INFO L129 PetriNetUnfolder]: 416/1418 cut-off events. [2022-07-22 21:46:13,876 INFO L130 PetriNetUnfolder]: For 2331/2349 co-relation queries the response was YES. [2022-07-22 21:46:13,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 1418 events. 416/1418 cut-off events. For 2331/2349 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10225 event pairs, 113 based on Foata normal form. 41/1442 useless extension candidates. Maximal degree in co-relation 4097. Up to 383 conditions per place. [2022-07-22 21:46:13,885 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 174 selfloop transitions, 33 changer transitions 0/292 dead transitions. [2022-07-22 21:46:13,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 292 transitions, 2234 flow [2022-07-22 21:46:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:46:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:46:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-22 21:46:13,887 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-22 21:46:13,887 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-22 21:46:13,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-22 21:46:13,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:13,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-22 21:46:13,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:13,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:13,891 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:13,891 INFO L186 Difference]: Start difference. First operand has 179 places, 177 transitions, 1020 flow. Second operand 16 states and 1370 transitions. [2022-07-22 21:46:13,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 292 transitions, 2234 flow [2022-07-22 21:46:13,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 292 transitions, 2048 flow, removed 55 selfloop flow, removed 19 redundant places. [2022-07-22 21:46:13,901 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 1270 flow [2022-07-22 21:46:13,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1270, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-22 21:46:13,902 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 78 predicate places. [2022-07-22 21:46:13,902 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 1270 flow [2022-07-22 21:46:13,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:13,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:13,913 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:13,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 21:46:14,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:46:14,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 447763680, now seen corresponding path program 7 times [2022-07-22 21:46:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:14,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994487356] [2022-07-22 21:46:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:14,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:14,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994487356] [2022-07-22 21:46:14,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994487356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:14,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725117976] [2022-07-22 21:46:14,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:46:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:14,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:14,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:46:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:46:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:14,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:14,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725117976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:14,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:14,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-22 21:46:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833317007] [2022-07-22 21:46:14,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:46:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:46:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:46:14,533 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-22 21:46:14,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 1270 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:14,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:14,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-22 21:46:14,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:14,943 INFO L129 PetriNetUnfolder]: 351/1201 cut-off events. [2022-07-22 21:46:14,943 INFO L130 PetriNetUnfolder]: For 2100/2138 co-relation queries the response was YES. [2022-07-22 21:46:14,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3682 conditions, 1201 events. 351/1201 cut-off events. For 2100/2138 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8505 event pairs, 135 based on Foata normal form. 62/1250 useless extension candidates. Maximal degree in co-relation 3650. Up to 453 conditions per place. [2022-07-22 21:46:14,950 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 101 selfloop transitions, 12 changer transitions 80/277 dead transitions. [2022-07-22 21:46:14,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 277 transitions, 2102 flow [2022-07-22 21:46:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:46:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:46:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-22 21:46:14,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-22 21:46:14,951 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-22 21:46:14,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-22 21:46:14,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:14,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-22 21:46:14,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:14,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:14,955 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:14,955 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 1270 flow. Second operand 16 states and 1370 transitions. [2022-07-22 21:46:14,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 277 transitions, 2102 flow [2022-07-22 21:46:14,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 2083 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:14,963 INFO L242 Difference]: Finished difference. Result has 198 places, 181 transitions, 1054 flow [2022-07-22 21:46:14,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1054, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2022-07-22 21:46:14,964 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 94 predicate places. [2022-07-22 21:46:14,964 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 1054 flow [2022-07-22 21:46:14,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:14,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:14,965 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:14,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:15,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 21:46:15,185 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1322365107, now seen corresponding path program 8 times [2022-07-22 21:46:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621922004] [2022-07-22 21:46:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:15,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:46:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621922004] [2022-07-22 21:46:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621922004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294651895] [2022-07-22 21:46:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:15,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:46:15,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:46:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:15,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:15,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294651895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:15,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:15,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-07-22 21:46:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647677366] [2022-07-22 21:46:15,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:15,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:46:15,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:46:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:46:15,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-07-22 21:46:15,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 1054 flow. Second operand has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:15,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:15,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-07-22 21:46:15,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:16,338 INFO L129 PetriNetUnfolder]: 427/1012 cut-off events. [2022-07-22 21:46:16,338 INFO L130 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2022-07-22 21:46:16,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3843 conditions, 1012 events. 427/1012 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5229 event pairs, 10 based on Foata normal form. 49/1059 useless extension candidates. Maximal degree in co-relation 3806. Up to 165 conditions per place. [2022-07-22 21:46:16,348 INFO L132 encePairwiseOnDemand]: 99/117 looper letters, 173 selfloop transitions, 117 changer transitions 0/354 dead transitions. [2022-07-22 21:46:16,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 2806 flow [2022-07-22 21:46:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 21:46:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-22 21:46:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3191 transitions. [2022-07-22 21:46:16,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993206223975454 [2022-07-22 21:46:16,351 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3191 transitions. [2022-07-22 21:46:16,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3191 transitions. [2022-07-22 21:46:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3191 transitions. [2022-07-22 21:46:16,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 81.82051282051282) internal successors, (3191), 39 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:16,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:16,360 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:16,360 INFO L186 Difference]: Start difference. First operand has 198 places, 181 transitions, 1054 flow. Second operand 39 states and 3191 transitions. [2022-07-22 21:46:16,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 2806 flow [2022-07-22 21:46:16,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 2479 flow, removed 127 selfloop flow, removed 22 redundant places. [2022-07-22 21:46:16,375 INFO L242 Difference]: Finished difference. Result has 225 places, 251 transitions, 1785 flow [2022-07-22 21:46:16,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1785, PETRI_PLACES=225, PETRI_TRANSITIONS=251} [2022-07-22 21:46:16,376 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 121 predicate places. [2022-07-22 21:46:16,376 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 251 transitions, 1785 flow [2022-07-22 21:46:16,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:16,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:16,377 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:16,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 21:46:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:46:16,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -823728965, now seen corresponding path program 9 times [2022-07-22 21:46:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:16,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680384274] [2022-07-22 21:46:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:46:16,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:16,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680384274] [2022-07-22 21:46:16,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680384274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:16,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506094531] [2022-07-22 21:46:16,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:46:16,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:16,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:16,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:46:16,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:46:16,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:16,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:46:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:46:16,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:46:17,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506094531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:17,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:17,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-22 21:46:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480875129] [2022-07-22 21:46:17,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:46:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:46:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:46:17,094 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-22 21:46:17,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 251 transitions, 1785 flow. Second operand has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:17,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:17,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-22 21:46:17,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:17,398 INFO L129 PetriNetUnfolder]: 310/826 cut-off events. [2022-07-22 21:46:17,398 INFO L130 PetriNetUnfolder]: For 4356/4380 co-relation queries the response was YES. [2022-07-22 21:46:17,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 826 events. 310/826 cut-off events. For 4356/4380 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3903 event pairs, 39 based on Foata normal form. 35/850 useless extension candidates. Maximal degree in co-relation 3679. Up to 171 conditions per place. [2022-07-22 21:46:17,405 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 137 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2022-07-22 21:46:17,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 2625 flow [2022-07-22 21:46:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:46:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:46:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2022-07-22 21:46:17,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2022-07-22 21:46:17,407 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2022-07-22 21:46:17,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2022-07-22 21:46:17,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:17,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2022-07-22 21:46:17,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:17,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:17,410 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:17,410 INFO L186 Difference]: Start difference. First operand has 225 places, 251 transitions, 1785 flow. Second operand 15 states and 1280 transitions. [2022-07-22 21:46:17,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 2625 flow [2022-07-22 21:46:17,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 2590 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-07-22 21:46:17,425 INFO L242 Difference]: Finished difference. Result has 232 places, 259 transitions, 1984 flow [2022-07-22 21:46:17,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1984, PETRI_PLACES=232, PETRI_TRANSITIONS=259} [2022-07-22 21:46:17,425 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 128 predicate places. [2022-07-22 21:46:17,425 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 259 transitions, 1984 flow [2022-07-22 21:46:17,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:17,426 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:17,426 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:17,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:17,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 21:46:17,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash -459984071, now seen corresponding path program 10 times [2022-07-22 21:46:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986357692] [2022-07-22 21:46:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986357692] [2022-07-22 21:46:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986357692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211897024] [2022-07-22 21:46:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:46:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:18,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:18,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:46:18,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:46:18,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-22 21:46:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:46:18,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:46:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:19,378 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) c_~counter~0)) 0)) is different from false [2022-07-22 21:46:19,390 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0)) 0)) is different from false [2022-07-22 21:46:19,420 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:46:19,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-22 21:46:19,436 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-22 21:46:19,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-22 21:46:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-22 21:46:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211897024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:19,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:19,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 21] total 61 [2022-07-22 21:46:19,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519736750] [2022-07-22 21:46:19,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 21:46:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 21:46:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3220, Unknown=2, NotChecked=230, Total=3660 [2022-07-22 21:46:19,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-22 21:46:19,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 259 transitions, 1984 flow. Second operand has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:19,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:19,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-22 21:46:19,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:23,408 INFO L129 PetriNetUnfolder]: 1948/3543 cut-off events. [2022-07-22 21:46:23,408 INFO L130 PetriNetUnfolder]: For 17319/17319 co-relation queries the response was YES. [2022-07-22 21:46:23,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16097 conditions, 3543 events. 1948/3543 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22845 event pairs, 145 based on Foata normal form. 1/3533 useless extension candidates. Maximal degree in co-relation 16054. Up to 2096 conditions per place. [2022-07-22 21:46:23,445 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 394 selfloop transitions, 144 changer transitions 4/577 dead transitions. [2022-07-22 21:46:23,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 577 transitions, 5247 flow [2022-07-22 21:46:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 21:46:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-22 21:46:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2573 transitions. [2022-07-22 21:46:23,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39984459984459986 [2022-07-22 21:46:23,448 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2573 transitions. [2022-07-22 21:46:23,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2573 transitions. [2022-07-22 21:46:23,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:23,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2573 transitions. [2022-07-22 21:46:23,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 46.78181818181818) internal successors, (2573), 55 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:23,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:23,460 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:23,461 INFO L186 Difference]: Start difference. First operand has 232 places, 259 transitions, 1984 flow. Second operand 55 states and 2573 transitions. [2022-07-22 21:46:23,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 577 transitions, 5247 flow [2022-07-22 21:46:23,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 577 transitions, 5107 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-07-22 21:46:23,518 INFO L242 Difference]: Finished difference. Result has 290 places, 371 transitions, 3266 flow [2022-07-22 21:46:23,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3266, PETRI_PLACES=290, PETRI_TRANSITIONS=371} [2022-07-22 21:46:23,518 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 186 predicate places. [2022-07-22 21:46:23,519 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 371 transitions, 3266 flow [2022-07-22 21:46:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:23,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:23,519 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:23,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 21:46:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:46:23,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1705508623, now seen corresponding path program 11 times [2022-07-22 21:46:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480098662] [2022-07-22 21:46:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:24,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480098662] [2022-07-22 21:46:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480098662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771128500] [2022-07-22 21:46:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:46:24,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:24,296 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:24,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:46:24,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:46:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 21:46:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:24,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:25,116 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:46:25,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-22 21:46:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771128500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:25,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:25,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 14] total 49 [2022-07-22 21:46:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476724760] [2022-07-22 21:46:25,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 21:46:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 21:46:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2181, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 21:46:25,257 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:25,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 371 transitions, 3266 flow. Second operand has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:25,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:25,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:25,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:27,853 INFO L129 PetriNetUnfolder]: 2510/4582 cut-off events. [2022-07-22 21:46:27,853 INFO L130 PetriNetUnfolder]: For 26191/26194 co-relation queries the response was YES. [2022-07-22 21:46:27,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23108 conditions, 4582 events. 2510/4582 cut-off events. For 26191/26194 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 31395 event pairs, 439 based on Foata normal form. 1/4552 useless extension candidates. Maximal degree in co-relation 23052. Up to 3125 conditions per place. [2022-07-22 21:46:27,895 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 450 selfloop transitions, 146 changer transitions 4/638 dead transitions. [2022-07-22 21:46:27,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 638 transitions, 6626 flow [2022-07-22 21:46:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 21:46:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-22 21:46:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2942 transitions. [2022-07-22 21:46:27,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45718725718725717 [2022-07-22 21:46:27,898 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2942 transitions. [2022-07-22 21:46:27,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2942 transitions. [2022-07-22 21:46:27,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:27,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2942 transitions. [2022-07-22 21:46:27,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.49090909090909) internal successors, (2942), 55 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:27,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:27,907 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:27,907 INFO L186 Difference]: Start difference. First operand has 290 places, 371 transitions, 3266 flow. Second operand 55 states and 2942 transitions. [2022-07-22 21:46:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 638 transitions, 6626 flow [2022-07-22 21:46:27,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 638 transitions, 6462 flow, removed 68 selfloop flow, removed 14 redundant places. [2022-07-22 21:46:28,003 INFO L242 Difference]: Finished difference. Result has 352 places, 451 transitions, 4562 flow [2022-07-22 21:46:28,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4562, PETRI_PLACES=352, PETRI_TRANSITIONS=451} [2022-07-22 21:46:28,004 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 248 predicate places. [2022-07-22 21:46:28,004 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 451 transitions, 4562 flow [2022-07-22 21:46:28,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:28,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:28,005 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:28,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 21:46:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:46:28,222 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 922626737, now seen corresponding path program 12 times [2022-07-22 21:46:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019592020] [2022-07-22 21:46:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:28,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019592020] [2022-07-22 21:46:28,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019592020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511998733] [2022-07-22 21:46:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:46:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:28,876 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:46:29,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:46:29,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:29,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-22 21:46:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:29,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 21:46:29,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:29,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:29,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:30,173 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_419 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_419) c_~A~0.base)) (.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset .cse1 4)))) 0)) is different from false [2022-07-22 21:46:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:30,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511998733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:30,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:30,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 15] total 59 [2022-07-22 21:46:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382509720] [2022-07-22 21:46:30,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 21:46:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 21:46:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3108, Unknown=1, NotChecked=112, Total=3422 [2022-07-22 21:46:30,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-22 21:46:30,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 451 transitions, 4562 flow. Second operand has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:30,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:30,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-22 21:46:30,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:33,983 INFO L129 PetriNetUnfolder]: 2927/5346 cut-off events. [2022-07-22 21:46:33,994 INFO L130 PetriNetUnfolder]: For 35445/35466 co-relation queries the response was YES. [2022-07-22 21:46:34,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28389 conditions, 5346 events. 2927/5346 cut-off events. For 35445/35466 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37839 event pairs, 518 based on Foata normal form. 15/5331 useless extension candidates. Maximal degree in co-relation 28310. Up to 3726 conditions per place. [2022-07-22 21:46:34,167 INFO L132 encePairwiseOnDemand]: 82/117 looper letters, 504 selfloop transitions, 208 changer transitions 4/751 dead transitions. [2022-07-22 21:46:34,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 751 transitions, 8468 flow [2022-07-22 21:46:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 21:46:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-22 21:46:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3244 transitions. [2022-07-22 21:46:34,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3960927960927961 [2022-07-22 21:46:34,174 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3244 transitions. [2022-07-22 21:46:34,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3244 transitions. [2022-07-22 21:46:34,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:34,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3244 transitions. [2022-07-22 21:46:34,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 46.34285714285714) internal successors, (3244), 70 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:34,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:34,189 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:34,190 INFO L186 Difference]: Start difference. First operand has 352 places, 451 transitions, 4562 flow. Second operand 70 states and 3244 transitions. [2022-07-22 21:46:34,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 751 transitions, 8468 flow [2022-07-22 21:46:34,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 751 transitions, 8331 flow, removed 33 selfloop flow, removed 26 redundant places. [2022-07-22 21:46:34,334 INFO L242 Difference]: Finished difference. Result has 408 places, 541 transitions, 6001 flow [2022-07-22 21:46:34,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6001, PETRI_PLACES=408, PETRI_TRANSITIONS=541} [2022-07-22 21:46:34,335 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 304 predicate places. [2022-07-22 21:46:34,335 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 541 transitions, 6001 flow [2022-07-22 21:46:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:34,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:34,336 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:34,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 21:46:34,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:34,553 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1149062991, now seen corresponding path program 13 times [2022-07-22 21:46:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871364876] [2022-07-22 21:46:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:35,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871364876] [2022-07-22 21:46:35,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871364876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493507478] [2022-07-22 21:46:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:46:35,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:35,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:35,073 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:35,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:46:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:35,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-22 21:46:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:35,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:35,756 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:46:35,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-22 21:46:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:35,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493507478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:35,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:35,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 14] total 47 [2022-07-22 21:46:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740272555] [2022-07-22 21:46:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 21:46:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 21:46:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2003, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 21:46:35,873 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:35,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 541 transitions, 6001 flow. Second operand has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:35,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:35,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:35,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:39,193 INFO L129 PetriNetUnfolder]: 3440/6268 cut-off events. [2022-07-22 21:46:39,194 INFO L130 PetriNetUnfolder]: For 59767/59834 co-relation queries the response was YES. [2022-07-22 21:46:39,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38625 conditions, 6268 events. 3440/6268 cut-off events. For 59767/59834 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 45820 event pairs, 595 based on Foata normal form. 21/6258 useless extension candidates. Maximal degree in co-relation 38532. Up to 4025 conditions per place. [2022-07-22 21:46:39,300 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 539 selfloop transitions, 253 changer transitions 4/834 dead transitions. [2022-07-22 21:46:39,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 834 transitions, 10660 flow [2022-07-22 21:46:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 21:46:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-22 21:46:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3377 transitions. [2022-07-22 21:46:39,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4581467914801248 [2022-07-22 21:46:39,319 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3377 transitions. [2022-07-22 21:46:39,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3377 transitions. [2022-07-22 21:46:39,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:39,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3377 transitions. [2022-07-22 21:46:39,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.6031746031746) internal successors, (3377), 63 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:39,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:39,327 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:39,328 INFO L186 Difference]: Start difference. First operand has 408 places, 541 transitions, 6001 flow. Second operand 63 states and 3377 transitions. [2022-07-22 21:46:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 834 transitions, 10660 flow [2022-07-22 21:46:39,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 834 transitions, 10179 flow, removed 149 selfloop flow, removed 42 redundant places. [2022-07-22 21:46:39,641 INFO L242 Difference]: Finished difference. Result has 438 places, 616 transitions, 7211 flow [2022-07-22 21:46:39,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7211, PETRI_PLACES=438, PETRI_TRANSITIONS=616} [2022-07-22 21:46:39,642 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 334 predicate places. [2022-07-22 21:46:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 616 transitions, 7211 flow [2022-07-22 21:46:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:39,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:39,643 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:39,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:39,861 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1238531119, now seen corresponding path program 14 times [2022-07-22 21:46:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:39,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94714329] [2022-07-22 21:46:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94714329] [2022-07-22 21:46:40,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94714329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087469313] [2022-07-22 21:46:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:40,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:40,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:40,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:46:40,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:40,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-22 21:46:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:40,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:41,128 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:46:41,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-22 21:46:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087469313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:41,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:41,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 48 [2022-07-22 21:46:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12626624] [2022-07-22 21:46:41,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 21:46:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 21:46:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 21:46:41,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-22 21:46:41,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 616 transitions, 7211 flow. Second operand has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:41,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:41,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-22 21:46:41,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:44,354 INFO L129 PetriNetUnfolder]: 3680/6721 cut-off events. [2022-07-22 21:46:44,354 INFO L130 PetriNetUnfolder]: For 74160/74223 co-relation queries the response was YES. [2022-07-22 21:46:44,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42934 conditions, 6721 events. 3680/6721 cut-off events. For 74160/74223 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 49923 event pairs, 751 based on Foata normal form. 20/6701 useless extension candidates. Maximal degree in co-relation 42830. Up to 4753 conditions per place. [2022-07-22 21:46:44,543 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 563 selfloop transitions, 231 changer transitions 4/836 dead transitions. [2022-07-22 21:46:44,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 836 transitions, 11231 flow [2022-07-22 21:46:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 21:46:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-07-22 21:46:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2986 transitions. [2022-07-22 21:46:44,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45573870573870573 [2022-07-22 21:46:44,548 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2986 transitions. [2022-07-22 21:46:44,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2986 transitions. [2022-07-22 21:46:44,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:44,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2986 transitions. [2022-07-22 21:46:44,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 53.32142857142857) internal successors, (2986), 56 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:44,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:44,558 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:44,559 INFO L186 Difference]: Start difference. First operand has 438 places, 616 transitions, 7211 flow. Second operand 56 states and 2986 transitions. [2022-07-22 21:46:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 836 transitions, 11231 flow [2022-07-22 21:46:44,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 836 transitions, 10805 flow, removed 136 selfloop flow, removed 30 redundant places. [2022-07-22 21:46:44,899 INFO L242 Difference]: Finished difference. Result has 470 places, 652 transitions, 8111 flow [2022-07-22 21:46:44,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=8111, PETRI_PLACES=470, PETRI_TRANSITIONS=652} [2022-07-22 21:46:44,900 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 366 predicate places. [2022-07-22 21:46:44,900 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 652 transitions, 8111 flow [2022-07-22 21:46:44,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:44,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:44,901 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:44,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 21:46:45,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:45,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1132419989, now seen corresponding path program 15 times [2022-07-22 21:46:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:45,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485801186] [2022-07-22 21:46:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:45,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:45,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485801186] [2022-07-22 21:46:45,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485801186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:45,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964524108] [2022-07-22 21:46:45,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:46:45,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:45,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:45,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:46:45,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:46:45,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-22 21:46:45,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:46,929 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:46,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-07-22 21:46:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:47,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:47,584 INFO L356 Elim1Store]: treesize reduction 29, result has 67.0 percent of original size [2022-07-22 21:46:47,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 71 [2022-07-22 21:46:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964524108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:48,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 25] total 77 [2022-07-22 21:46:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698939028] [2022-07-22 21:46:48,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-22 21:46:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-22 21:46:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=5413, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 21:46:48,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-22 21:46:48,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 652 transitions, 8111 flow. Second operand has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:48,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:48,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-22 21:46:48,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:55,035 INFO L129 PetriNetUnfolder]: 4566/8409 cut-off events. [2022-07-22 21:46:55,035 INFO L130 PetriNetUnfolder]: For 100705/100769 co-relation queries the response was YES. [2022-07-22 21:46:55,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54347 conditions, 8409 events. 4566/8409 cut-off events. For 100705/100769 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 65920 event pairs, 778 based on Foata normal form. 18/8384 useless extension candidates. Maximal degree in co-relation 54237. Up to 5146 conditions per place. [2022-07-22 21:46:55,167 INFO L132 encePairwiseOnDemand]: 81/117 looper letters, 685 selfloop transitions, 384 changer transitions 10/1114 dead transitions. [2022-07-22 21:46:55,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1114 transitions, 15769 flow [2022-07-22 21:46:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-22 21:46:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-22 21:46:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3453 transitions. [2022-07-22 21:46:55,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3935042735042735 [2022-07-22 21:46:55,172 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3453 transitions. [2022-07-22 21:46:55,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3453 transitions. [2022-07-22 21:46:55,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:55,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3453 transitions. [2022-07-22 21:46:55,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 46.04) internal successors, (3453), 75 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:55,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:55,181 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:55,181 INFO L186 Difference]: Start difference. First operand has 470 places, 652 transitions, 8111 flow. Second operand 75 states and 3453 transitions. [2022-07-22 21:46:55,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1114 transitions, 15769 flow [2022-07-22 21:46:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1114 transitions, 14809 flow, removed 331 selfloop flow, removed 43 redundant places. [2022-07-22 21:46:55,785 INFO L242 Difference]: Finished difference. Result has 529 places, 854 transitions, 11722 flow [2022-07-22 21:46:55,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=11722, PETRI_PLACES=529, PETRI_TRANSITIONS=854} [2022-07-22 21:46:55,786 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 425 predicate places. [2022-07-22 21:46:55,786 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 854 transitions, 11722 flow [2022-07-22 21:46:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:55,787 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:55,787 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:55,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:55,993 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1005576847, now seen corresponding path program 16 times [2022-07-22 21:46:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389583843] [2022-07-22 21:46:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389583843] [2022-07-22 21:46:56,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389583843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457718029] [2022-07-22 21:46:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:46:56,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:56,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:56,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:56,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:46:56,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:46:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 21:46:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:57,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:57,437 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:46:57,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-22 21:46:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:46:57,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457718029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:57,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:57,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 14] total 51 [2022-07-22 21:46:57,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247861423] [2022-07-22 21:46:57,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:57,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-22 21:46:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-22 21:46:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 21:46:57,544 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-22 21:46:57,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 854 transitions, 11722 flow. Second operand has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:57,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:57,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-22 21:46:57,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:02,060 INFO L129 PetriNetUnfolder]: 4760/8727 cut-off events. [2022-07-22 21:47:02,061 INFO L130 PetriNetUnfolder]: For 132788/132875 co-relation queries the response was YES. [2022-07-22 21:47:02,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64077 conditions, 8727 events. 4760/8727 cut-off events. For 132788/132875 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 68126 event pairs, 1066 based on Foata normal form. 20/8702 useless extension candidates. Maximal degree in co-relation 63940. Up to 6344 conditions per place. [2022-07-22 21:47:02,188 INFO L132 encePairwiseOnDemand]: 86/117 looper letters, 744 selfloop transitions, 228 changer transitions 4/1011 dead transitions. [2022-07-22 21:47:02,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1011 transitions, 15660 flow [2022-07-22 21:47:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 21:47:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-22 21:47:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2450 transitions. [2022-07-22 21:47:02,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39509756490888565 [2022-07-22 21:47:02,208 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2450 transitions. [2022-07-22 21:47:02,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2450 transitions. [2022-07-22 21:47:02,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:02,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2450 transitions. [2022-07-22 21:47:02,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 46.22641509433962) internal successors, (2450), 53 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:02,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:02,215 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:02,215 INFO L186 Difference]: Start difference. First operand has 529 places, 854 transitions, 11722 flow. Second operand 53 states and 2450 transitions. [2022-07-22 21:47:02,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1011 transitions, 15660 flow [2022-07-22 21:47:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1011 transitions, 14939 flow, removed 292 selfloop flow, removed 38 redundant places. [2022-07-22 21:47:02,997 INFO L242 Difference]: Finished difference. Result has 542 places, 861 transitions, 11631 flow [2022-07-22 21:47:02,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11011, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11631, PETRI_PLACES=542, PETRI_TRANSITIONS=861} [2022-07-22 21:47:02,999 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 438 predicate places. [2022-07-22 21:47:02,999 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 861 transitions, 11631 flow [2022-07-22 21:47:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:02,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:03,000 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:47:03,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:47:03,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:03,216 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:47:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 191143539, now seen corresponding path program 17 times [2022-07-22 21:47:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:03,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584217842] [2022-07-22 21:47:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:03,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584217842] [2022-07-22 21:47:03,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584217842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:47:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284227236] [2022-07-22 21:47:03,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:47:03,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:47:03,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:47:03,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 21:47:03,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:47:03,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:47:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-22 21:47:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:47:04,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 21:47:04,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:47:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:47:04,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:47:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:47:04,966 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:04,998 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:05,003 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)))) 0)) is different from false [2022-07-22 21:47:05,009 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base)) (.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (* (- 1) (select .cse1 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse1 (+ c_~A~0.offset 4))) (select .cse1 (+ c_~A~0.offset .cse0 4)))) 0)) is different from false [2022-07-22 21:47:05,016 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0) 0)) is different from false [2022-07-22 21:47:05,024 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-22 21:47:05,036 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-22 21:47:05,042 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-22 21:47:05,046 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0)) 0)) is different from false [2022-07-22 21:47:05,061 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:47:05,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-22 21:47:05,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 290 [2022-07-22 21:47:05,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 274 [2022-07-22 21:47:05,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 258 [2022-07-22 21:47:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 13 not checked. [2022-07-22 21:47:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284227236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:47:05,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:47:05,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 23] total 64 [2022-07-22 21:47:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425736554] [2022-07-22 21:47:05,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:47:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 21:47:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:47:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 21:47:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2796, Unknown=9, NotChecked=1026, Total=4032 [2022-07-22 21:47:05,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-22 21:47:05,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 861 transitions, 11631 flow. Second operand has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:05,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:47:05,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-22 21:47:05,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:12,028 INFO L129 PetriNetUnfolder]: 6320/11529 cut-off events. [2022-07-22 21:47:12,029 INFO L130 PetriNetUnfolder]: For 174299/174390 co-relation queries the response was YES. [2022-07-22 21:47:12,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86340 conditions, 11529 events. 6320/11529 cut-off events. For 174299/174390 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 93851 event pairs, 1166 based on Foata normal form. 20/11510 useless extension candidates. Maximal degree in co-relation 86205. Up to 7834 conditions per place. [2022-07-22 21:47:12,211 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 1014 selfloop transitions, 423 changer transitions 4/1473 dead transitions. [2022-07-22 21:47:12,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1473 transitions, 24158 flow [2022-07-22 21:47:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 21:47:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 21:47:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 2669 transitions. [2022-07-22 21:47:12,213 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37396665265517726 [2022-07-22 21:47:12,213 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 2669 transitions. [2022-07-22 21:47:12,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 2669 transitions. [2022-07-22 21:47:12,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:12,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 2669 transitions. [2022-07-22 21:47:12,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 43.75409836065574) internal successors, (2669), 61 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:12,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:12,230 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:12,230 INFO L186 Difference]: Start difference. First operand has 542 places, 861 transitions, 11631 flow. Second operand 61 states and 2669 transitions. [2022-07-22 21:47:12,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1473 transitions, 24158 flow [2022-07-22 21:47:13,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1473 transitions, 23559 flow, removed 38 selfloop flow, removed 49 redundant places. [2022-07-22 21:47:13,247 INFO L242 Difference]: Finished difference. Result has 579 places, 1215 transitions, 18982 flow [2022-07-22 21:47:13,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=18982, PETRI_PLACES=579, PETRI_TRANSITIONS=1215} [2022-07-22 21:47:13,248 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 475 predicate places. [2022-07-22 21:47:13,248 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1215 transitions, 18982 flow [2022-07-22 21:47:13,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:13,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:13,248 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:47:13,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-22 21:47:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:13,463 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:47:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -771135465, now seen corresponding path program 18 times [2022-07-22 21:47:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415100311] [2022-07-22 21:47:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415100311] [2022-07-22 21:47:14,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415100311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:47:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426433720] [2022-07-22 21:47:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:47:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:47:14,059 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:47:14,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 21:47:14,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:47:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:47:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 21:47:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:47:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:47:14,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:47:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:47:14,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:47:14,955 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-22 21:47:14,967 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)))) 0)) is different from false [2022-07-22 21:47:14,971 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-22 21:47:14,999 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:47:14,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-22 21:47:15,016 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-22 21:47:15,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-22 21:47:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-22 21:47:15,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426433720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:47:15,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:47:15,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21, 21] total 57 [2022-07-22 21:47:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767567631] [2022-07-22 21:47:15,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:47:15,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 21:47:15,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:47:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 21:47:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2691, Unknown=3, NotChecked=318, Total=3192 [2022-07-22 21:47:15,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-22 21:47:15,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1215 transitions, 18982 flow. Second operand has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:15,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:47:15,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-22 21:47:15,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:22,856 INFO L129 PetriNetUnfolder]: 7049/12919 cut-off events. [2022-07-22 21:47:22,856 INFO L130 PetriNetUnfolder]: For 339589/339738 co-relation queries the response was YES. [2022-07-22 21:47:23,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115209 conditions, 12919 events. 7049/12919 cut-off events. For 339589/339738 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 108110 event pairs, 1607 based on Foata normal form. 41/12890 useless extension candidates. Maximal degree in co-relation 115049. Up to 9093 conditions per place. [2022-07-22 21:47:23,086 INFO L132 encePairwiseOnDemand]: 85/117 looper letters, 958 selfloop transitions, 485 changer transitions 4/1479 dead transitions. [2022-07-22 21:47:23,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1479 transitions, 26102 flow [2022-07-22 21:47:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-22 21:47:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-22 21:47:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2237 transitions. [2022-07-22 21:47:23,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3823931623931624 [2022-07-22 21:47:23,088 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2237 transitions. [2022-07-22 21:47:23,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2237 transitions. [2022-07-22 21:47:23,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:23,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2237 transitions. [2022-07-22 21:47:23,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 44.74) internal successors, (2237), 50 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:23,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:23,116 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:23,116 INFO L186 Difference]: Start difference. First operand has 579 places, 1215 transitions, 18982 flow. Second operand 50 states and 2237 transitions. [2022-07-22 21:47:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1479 transitions, 26102 flow [2022-07-22 21:47:24,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1479 transitions, 25450 flow, removed 207 selfloop flow, removed 28 redundant places. [2022-07-22 21:47:24,910 INFO L242 Difference]: Finished difference. Result has 611 places, 1317 transitions, 21841 flow [2022-07-22 21:47:24,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=18424, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=21841, PETRI_PLACES=611, PETRI_TRANSITIONS=1317} [2022-07-22 21:47:24,911 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 507 predicate places. [2022-07-22 21:47:24,911 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1317 transitions, 21841 flow [2022-07-22 21:47:24,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:24,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:24,911 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:47:24,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 21:47:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 21:47:25,128 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:47:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619099, now seen corresponding path program 19 times [2022-07-22 21:47:25,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:25,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256948068] [2022-07-22 21:47:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:25,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256948068] [2022-07-22 21:47:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256948068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:47:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968751987] [2022-07-22 21:47:25,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:47:25,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:25,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:47:25,710 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:47:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 21:47:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:25,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-22 21:47:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:47:25,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:47:25,871 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:47:25,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:47:26,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:47:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:47:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:47:26,579 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0)) is different from false [2022-07-22 21:47:26,590 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:26,594 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:26,621 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:47:26,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-22 21:47:26,638 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-22 21:47:26,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-22 21:47:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-22 21:47:26,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968751987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:47:26,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:47:26,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 21] total 57 [2022-07-22 21:47:26,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330125185] [2022-07-22 21:47:26,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:47:26,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 21:47:26,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:47:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 21:47:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2669, Unknown=3, NotChecked=318, Total=3192 [2022-07-22 21:47:26,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-22 21:47:26,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1317 transitions, 21841 flow. Second operand has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:26,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:47:26,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-22 21:47:26,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:35,231 INFO L129 PetriNetUnfolder]: 8591/15839 cut-off events. [2022-07-22 21:47:35,231 INFO L130 PetriNetUnfolder]: For 467646/467791 co-relation queries the response was YES. [2022-07-22 21:47:35,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148210 conditions, 15839 events. 8591/15839 cut-off events. For 467646/467791 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 136120 event pairs, 1836 based on Foata normal form. 49/15817 useless extension candidates. Maximal degree in co-relation 148038. Up to 10046 conditions per place. [2022-07-22 21:47:35,678 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1242 selfloop transitions, 820 changer transitions 8/2102 dead transitions. [2022-07-22 21:47:35,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2102 transitions, 40509 flow [2022-07-22 21:47:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 21:47:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-22 21:47:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 3469 transitions. [2022-07-22 21:47:35,681 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.38012272627657245 [2022-07-22 21:47:35,681 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 3469 transitions. [2022-07-22 21:47:35,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 3469 transitions. [2022-07-22 21:47:35,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:35,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 3469 transitions. [2022-07-22 21:47:35,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 44.47435897435897) internal successors, (3469), 78 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:35,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:35,690 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:35,690 INFO L186 Difference]: Start difference. First operand has 611 places, 1317 transitions, 21841 flow. Second operand 78 states and 3469 transitions. [2022-07-22 21:47:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2102 transitions, 40509 flow [2022-07-22 21:47:38,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2102 transitions, 39748 flow, removed 268 selfloop flow, removed 33 redundant places. [2022-07-22 21:47:38,602 INFO L242 Difference]: Finished difference. Result has 691 places, 1803 transitions, 34108 flow [2022-07-22 21:47:38,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=21092, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=34108, PETRI_PLACES=691, PETRI_TRANSITIONS=1803} [2022-07-22 21:47:38,604 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 587 predicate places. [2022-07-22 21:47:38,604 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1803 transitions, 34108 flow [2022-07-22 21:47:38,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:38,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:38,605 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:47:38,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 21:47:38,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 21:47:38,824 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:47:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1982964057, now seen corresponding path program 20 times [2022-07-22 21:47:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:38,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364756701] [2022-07-22 21:47:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364756701] [2022-07-22 21:47:39,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364756701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:47:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540145028] [2022-07-22 21:47:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:47:39,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:39,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:47:39,408 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:47:39,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 21:47:39,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:47:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:47:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 21:47:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:47:39,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:47:39,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:47:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:47:40,146 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:47:40,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-22 21:47:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:47:40,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:47:40,356 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:40,367 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:40,370 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:47:40,401 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:47:40,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-22 21:47:40,419 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-22 21:47:40,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-22 21:47:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-22 21:47:40,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540145028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:47:40,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:47:40,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 57 [2022-07-22 21:47:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936787514] [2022-07-22 21:47:40,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:47:40,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 21:47:40,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:47:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 21:47:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2688, Unknown=3, NotChecked=318, Total=3192 [2022-07-22 21:47:40,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-22 21:47:40,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1803 transitions, 34108 flow. Second operand has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:40,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:47:40,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-22 21:47:40,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:53,805 INFO L129 PetriNetUnfolder]: 9890/18288 cut-off events. [2022-07-22 21:47:53,806 INFO L130 PetriNetUnfolder]: For 1442790/1443011 co-relation queries the response was YES. [2022-07-22 21:47:54,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219193 conditions, 18288 events. 9890/18288 cut-off events. For 1442790/1443011 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 161420 event pairs, 2111 based on Foata normal form. 124/18332 useless extension candidates. Maximal degree in co-relation 218984. Up to 10746 conditions per place. [2022-07-22 21:47:54,655 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1205 selfloop transitions, 1261 changer transitions 4/2502 dead transitions. [2022-07-22 21:47:54,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2502 transitions, 54277 flow [2022-07-22 21:47:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 21:47:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-22 21:47:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3152 transitions. [2022-07-22 21:47:54,658 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37943902732635126 [2022-07-22 21:47:54,658 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3152 transitions. [2022-07-22 21:47:54,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3152 transitions. [2022-07-22 21:47:54,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:54,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3152 transitions. [2022-07-22 21:47:54,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 44.394366197183096) internal successors, (3152), 71 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:54,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:54,666 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:54,666 INFO L186 Difference]: Start difference. First operand has 691 places, 1803 transitions, 34108 flow. Second operand 71 states and 3152 transitions. [2022-07-22 21:47:54,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2502 transitions, 54277 flow [2022-07-22 21:48:01,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 2502 transitions, 52715 flow, removed 645 selfloop flow, removed 38 redundant places. [2022-07-22 21:48:01,169 INFO L242 Difference]: Finished difference. Result has 738 places, 2196 transitions, 45047 flow [2022-07-22 21:48:01,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=32754, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=45047, PETRI_PLACES=738, PETRI_TRANSITIONS=2196} [2022-07-22 21:48:01,172 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 634 predicate places. [2022-07-22 21:48:01,172 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2196 transitions, 45047 flow [2022-07-22 21:48:01,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:01,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:01,173 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:01,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 21:48:01,390 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 722800081, now seen corresponding path program 21 times [2022-07-22 21:48:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:01,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046009260] [2022-07-22 21:48:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:02,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046009260] [2022-07-22 21:48:02,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046009260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:02,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880956980] [2022-07-22 21:48:02,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:48:02,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:02,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:02,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:48:02,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 21:48:02,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:48:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-22 21:48:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:02,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:02,531 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:48:02,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:48:02,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:48:03,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:03,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:48:03,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:03,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-07-22 21:48:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:03,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:04,096 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) is different from false [2022-07-22 21:48:04,106 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2022-07-22 21:48:04,452 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select .cse1 (+ c_~A~0.offset .cse0 4)) (* (- 1) (select .cse1 c_~A~0.offset)) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0)) 0)))) is different from false [2022-07-22 21:48:04,470 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset 4)))) 0) (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< 1 c_~N~0))) is different from false [2022-07-22 21:48:04,489 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse1 (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse1 (+ c_~A~0.offset 4)) (* (- 1) (select .cse1 c_~A~0.offset))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-22 21:48:04,523 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_main_#t~ret8#1.base|))) (+ (* (- 1) (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) (select (select .cse1 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) c_~counter~0 (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|))))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-22 21:48:04,545 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) (* (- 1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-22 21:48:04,561 WARN L833 $PredicateComparison]: unable to prove that (or (not (< 1 c_~N~0)) (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse0 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (* (- 1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (* (- 1) (select .cse0 (+ (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) 0) (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0))))) is different from false [2022-07-22 21:48:04,849 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:04,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 68 [2022-07-22 21:48:04,870 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-22 21:48:04,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 244 [2022-07-22 21:48:04,881 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-22 21:48:04,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 196 [2022-07-22 21:48:04,894 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-22 21:48:04,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 168 [2022-07-22 21:48:05,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:48:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-22 21:48:05,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880956980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:05,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:05,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 91 [2022-07-22 21:48:05,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215728445] [2022-07-22 21:48:05,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:05,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-22 21:48:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-22 21:48:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=6358, Unknown=22, NotChecked=1352, Total=8190 [2022-07-22 21:48:05,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-22 21:48:05,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2196 transitions, 45047 flow. Second operand has 91 states, 91 states have (on average 40.2967032967033) internal successors, (3667), 91 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:05,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-22 21:48:05,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:26,355 INFO L129 PetriNetUnfolder]: 12520/23344 cut-off events. [2022-07-22 21:48:26,356 INFO L130 PetriNetUnfolder]: For 1825601/1825909 co-relation queries the response was YES. [2022-07-22 21:48:27,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278145 conditions, 23344 events. 12520/23344 cut-off events. For 1825601/1825909 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 214557 event pairs, 2034 based on Foata normal form. 84/23373 useless extension candidates. Maximal degree in co-relation 277920. Up to 12358 conditions per place. [2022-07-22 21:48:27,559 INFO L132 encePairwiseOnDemand]: 78/117 looper letters, 1471 selfloop transitions, 1845 changer transitions 8/3356 dead transitions. [2022-07-22 21:48:27,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 828 places, 3356 transitions, 74723 flow [2022-07-22 21:48:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-22 21:48:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-22 21:48:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4075 transitions. [2022-07-22 21:48:27,563 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37450601966731 [2022-07-22 21:48:27,563 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 4075 transitions. [2022-07-22 21:48:27,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 4075 transitions. [2022-07-22 21:48:27,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:27,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 4075 transitions. [2022-07-22 21:48:27,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 43.81720430107527) internal successors, (4075), 93 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:27,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 117.0) internal successors, (10998), 94 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:27,573 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 117.0) internal successors, (10998), 94 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:27,573 INFO L186 Difference]: Start difference. First operand has 738 places, 2196 transitions, 45047 flow. Second operand 93 states and 4075 transitions. [2022-07-22 21:48:27,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 828 places, 3356 transitions, 74723 flow [2022-07-22 21:48:37,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 3356 transitions, 73441 flow, removed 412 selfloop flow, removed 37 redundant places. [2022-07-22 21:48:37,849 INFO L242 Difference]: Finished difference. Result has 829 places, 2959 transitions, 66351 flow [2022-07-22 21:48:37,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=43941, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=66351, PETRI_PLACES=829, PETRI_TRANSITIONS=2959} [2022-07-22 21:48:37,851 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 725 predicate places. [2022-07-22 21:48:37,851 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2959 transitions, 66351 flow [2022-07-22 21:48:37,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 40.2967032967033) internal successors, (3667), 91 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:37,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:37,852 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:37,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:38,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:38,061 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash 305206829, now seen corresponding path program 22 times [2022-07-22 21:48:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856476428] [2022-07-22 21:48:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:38,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856476428] [2022-07-22 21:48:38,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856476428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420532740] [2022-07-22 21:48:38,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:48:38,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:38,650 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:48:38,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 21:48:38,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:48:38,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-22 21:48:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:38,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:38,818 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:48:38,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:48:39,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:39,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:39,597 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0)) is different from false [2022-07-22 21:48:39,610 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-22 21:48:39,614 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))))) is different from false [2022-07-22 21:48:39,636 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-22 21:48:39,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-22 21:48:39,647 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-22 21:48:39,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-22 21:48:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2022-07-22 21:48:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420532740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:39,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 21] total 60 [2022-07-22 21:48:39,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810566015] [2022-07-22 21:48:39,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 21:48:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 21:48:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2978, Unknown=3, NotChecked=336, Total=3540 [2022-07-22 21:48:39,937 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-22 21:48:39,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2959 transitions, 66351 flow. Second operand has 60 states, 60 states have (on average 42.13333333333333) internal successors, (2528), 60 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:39,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:39,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-22 21:48:39,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand