./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:21:26,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:21:26,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:21:26,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:21:26,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:21:26,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:21:26,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:21:26,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:21:26,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:21:26,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:21:26,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:21:26,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:21:26,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:21:26,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:21:26,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:21:26,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:21:26,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:21:26,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:21:26,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:21:26,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:21:26,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:21:26,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:21:26,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:21:26,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:21:26,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:21:26,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:21:26,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:21:26,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:21:26,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:21:26,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:21:26,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:21:26,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:21:26,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:21:26,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:21:26,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:21:26,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:21:26,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:21:26,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:21:26,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:21:26,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:21:26,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:21:26,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:21:26,697 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:21:26,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:21:26,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:21:26,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:21:26,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:21:26,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:21:26,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:21:26,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:21:26,701 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:21:26,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:21:26,702 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:21:26,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:21:26,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:21:26,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:21:26,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:21:26,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:21:26,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:21:26,703 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:21:26,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:21:26,704 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:21:26,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:21:26,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:21:26,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:21:26,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:21:26,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:21:26,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:21:26,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:21:26,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:21:26,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:21:26,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:21:26,706 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:21:26,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:21:26,706 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:21:26,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:21:26,707 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:21:26,707 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:21:27,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:21:27,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:21:27,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:21:27,037 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:21:27,037 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:21:27,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 14:21:28,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:21:28,474 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:21:28,474 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 14:21:28,489 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b22169315/609ac15c8b1540f28cb67fb5bf70d1b0/FLAG063a1c827 [2023-09-01 14:21:28,509 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b22169315/609ac15c8b1540f28cb67fb5bf70d1b0 [2023-09-01 14:21:28,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:21:28,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:21:28,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:21:28,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:21:28,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:21:28,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a24605d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28, skipping insertion in model container [2023-09-01 14:21:28,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:21:28,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:21:28,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 14:21:28,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:21:28,735 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:21:28,754 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 14:21:28,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:21:28,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:21:28,766 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:21:28,772 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:21:28,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28 WrapperNode [2023-09-01 14:21:28,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:21:28,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:21:28,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:21:28,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:21:28,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,807 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 170 [2023-09-01 14:21:28,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:21:28,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:21:28,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:21:28,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:21:28,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:21:28,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:21:28,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:21:28,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:21:28,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (1/1) ... [2023-09-01 14:21:28,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:21:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:28,870 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) [2023-09-01 14:21:28,874 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 [2023-09-01 14:21:28,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:21:28,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:21:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:21:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:21:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:21:28,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:21:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:21:28,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:21:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:21:28,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:21:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:21:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:21:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:21:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:21:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:21:28,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:21:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:21:28,910 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:21:28,984 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:21:28,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:21:29,218 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:21:29,328 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:21:29,328 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:21:29,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:21:29 BoogieIcfgContainer [2023-09-01 14:21:29,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:21:29,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:21:29,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:21:29,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:21:29,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:21:28" (1/3) ... [2023-09-01 14:21:29,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6754a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:21:29, skipping insertion in model container [2023-09-01 14:21:29,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:21:28" (2/3) ... [2023-09-01 14:21:29,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6754a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:21:29, skipping insertion in model container [2023-09-01 14:21:29,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:21:29" (3/3) ... [2023-09-01 14:21:29,338 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-09-01 14:21:29,345 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:21:29,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:21:29,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:21:29,354 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:21:29,451 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 14:21:29,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 148 transitions, 320 flow [2023-09-01 14:21:29,610 INFO L130 PetriNetUnfolder]: 11/145 cut-off events. [2023-09-01 14:21:29,614 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:21:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 11/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-09-01 14:21:29,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 148 transitions, 320 flow [2023-09-01 14:21:29,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 135 transitions, 288 flow [2023-09-01 14:21:29,632 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:21:29,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 135 transitions, 288 flow [2023-09-01 14:21:29,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 135 transitions, 288 flow [2023-09-01 14:21:29,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 135 transitions, 288 flow [2023-09-01 14:21:29,694 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2023-09-01 14:21:29,696 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:21:29,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 11/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-09-01 14:21:29,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 1082 [2023-09-01 14:21:34,352 INFO L134 LiptonReduction]: Checked pairs total: 2030 [2023-09-01 14:21:34,352 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-09-01 14:21:34,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:21:34,370 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44ef2671, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:21:34,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 14:21:34,376 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2023-09-01 14:21:34,376 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:21:34,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:34,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:21:34,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:34,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1050761945, now seen corresponding path program 1 times [2023-09-01 14:21:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92969489] [2023-09-01 14:21:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92969489] [2023-09-01 14:21:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92969489] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:21:34,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:21:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:21:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225165584] [2023-09-01 14:21:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:21:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:21:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:21:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:21:34,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-09-01 14:21:34,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:34,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:34,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-09-01 14:21:34,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:34,988 INFO L130 PetriNetUnfolder]: 238/394 cut-off events. [2023-09-01 14:21:34,989 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-09-01 14:21:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 394 events. 238/394 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 14 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 687. Up to 129 conditions per place. [2023-09-01 14:21:34,993 INFO L137 encePairwiseOnDemand]: 278/283 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-09-01 14:21:34,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 230 flow [2023-09-01 14:21:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:21:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:21:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-09-01 14:21:35,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812720848056537 [2023-09-01 14:21:35,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-09-01 14:21:35,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-09-01 14:21:35,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:35,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-09-01 14:21:35,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,043 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 681 transitions. [2023-09-01 14:21:35,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 230 flow [2023-09-01 14:21:35,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 14:21:35,047 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-09-01 14:21:35,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-09-01 14:21:35,052 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-09-01 14:21:35,052 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-09-01 14:21:35,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:35,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:21:35,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:21:35,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:35,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 982828987, now seen corresponding path program 2 times [2023-09-01 14:21:35,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:35,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091206011] [2023-09-01 14:21:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:35,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:35,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091206011] [2023-09-01 14:21:35,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091206011] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:21:35,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:21:35,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:21:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248611969] [2023-09-01 14:21:35,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:21:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:21:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:21:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:21:35,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-09-01 14:21:35,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:35,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-09-01 14:21:35,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:35,688 INFO L130 PetriNetUnfolder]: 530/812 cut-off events. [2023-09-01 14:21:35,688 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-09-01 14:21:35,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 812 events. 530/812 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3315 event pairs, 36 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 705. Up to 298 conditions per place. [2023-09-01 14:21:35,694 INFO L137 encePairwiseOnDemand]: 276/283 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-09-01 14:21:35,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 300 flow [2023-09-01 14:21:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:21:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:21:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 918 transitions. [2023-09-01 14:21:35,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634023220595659 [2023-09-01 14:21:35,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 918 transitions. [2023-09-01 14:21:35,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 918 transitions. [2023-09-01 14:21:35,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:35,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 918 transitions. [2023-09-01 14:21:35,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,709 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,709 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 918 transitions. [2023-09-01 14:21:35,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 300 flow [2023-09-01 14:21:35,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:21:35,714 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-09-01 14:21:35,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-09-01 14:21:35,715 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-09-01 14:21:35,715 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-09-01 14:21:35,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:35,716 INFO L208 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] [2023-09-01 14:21:35,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:21:35,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:35,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1712825980, now seen corresponding path program 1 times [2023-09-01 14:21:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381233619] [2023-09-01 14:21:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381233619] [2023-09-01 14:21:35,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381233619] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:21:35,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:21:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:21:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127203096] [2023-09-01 14:21:35,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:21:35,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:21:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:21:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:21:35,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-09-01 14:21:35,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:35,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:35,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-09-01 14:21:35,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:36,001 INFO L130 PetriNetUnfolder]: 205/384 cut-off events. [2023-09-01 14:21:36,001 INFO L131 PetriNetUnfolder]: For 483/483 co-relation queries the response was YES. [2023-09-01 14:21:36,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 384 events. 205/384 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1426 event pairs, 87 based on Foata normal form. 14/354 useless extension candidates. Maximal degree in co-relation 662. Up to 264 conditions per place. [2023-09-01 14:21:36,004 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 28 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-09-01 14:21:36,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 196 flow [2023-09-01 14:21:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:21:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:21:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-09-01 14:21:36,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48527679623085984 [2023-09-01 14:21:36,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-09-01 14:21:36,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-09-01 14:21:36,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:36,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-09-01 14:21:36,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,011 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 412 transitions. [2023-09-01 14:21:36,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 196 flow [2023-09-01 14:21:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 174 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 14:21:36,020 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-09-01 14:21:36,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-09-01 14:21:36,021 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 14:21:36,024 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-09-01 14:21:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:36,025 INFO L208 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] [2023-09-01 14:21:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:21:36,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:36,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1306821357, now seen corresponding path program 1 times [2023-09-01 14:21:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:36,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273138286] [2023-09-01 14:21:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:36,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:21:36,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:36,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273138286] [2023-09-01 14:21:36,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273138286] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:21:36,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:21:36,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:21:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590960111] [2023-09-01 14:21:36,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:21:36,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:21:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:21:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:21:36,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-09-01 14:21:36,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:36,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-09-01 14:21:36,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:36,271 INFO L130 PetriNetUnfolder]: 234/450 cut-off events. [2023-09-01 14:21:36,271 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2023-09-01 14:21:36,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 450 events. 234/450 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1779 event pairs, 187 based on Foata normal form. 10/402 useless extension candidates. Maximal degree in co-relation 746. Up to 330 conditions per place. [2023-09-01 14:21:36,274 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 22 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-09-01 14:21:36,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 197 flow [2023-09-01 14:21:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:21:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:21:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-09-01 14:21:36,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47703180212014135 [2023-09-01 14:21:36,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-09-01 14:21:36,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-09-01 14:21:36,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:36,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-09-01 14:21:36,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,282 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 540 transitions. [2023-09-01 14:21:36,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 197 flow [2023-09-01 14:21:36,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:21:36,284 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-09-01 14:21:36,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-09-01 14:21:36,285 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-09-01 14:21:36,285 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-09-01 14:21:36,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:36,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:36,286 INFO L208 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] [2023-09-01 14:21:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:21:36,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:36,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash -372538144, now seen corresponding path program 1 times [2023-09-01 14:21:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655598097] [2023-09-01 14:21:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:37,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655598097] [2023-09-01 14:21:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655598097] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:21:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971023254] [2023-09-01 14:21:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:21:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:37,365 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) [2023-09-01 14:21:37,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:21:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 14:21:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:21:37,725 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-09-01 14:21:37,830 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:21:38,019 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:21:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:21:38,153 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:21:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:38,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:21:38,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:21:38,985 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 53 [2023-09-01 14:21:39,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:21:39,007 INFO L350 Elim1Store]: Elim1 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 484 treesize of output 460 [2023-09-01 14:21:39,039 INFO L350 Elim1Store]: Elim1 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 152 treesize of output 128 [2023-09-01 14:21:39,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:21:39,058 INFO L350 Elim1Store]: Elim1 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 126 treesize of output 122 [2023-09-01 14:21:39,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:21:39,076 INFO L350 Elim1Store]: Elim1 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 125 treesize of output 109 [2023-09-01 14:21:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971023254] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:21:39,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:21:39,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-09-01 14:21:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337986618] [2023-09-01 14:21:39,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:21:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:21:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:21:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1037, Unknown=4, NotChecked=0, Total=1190 [2023-09-01 14:21:39,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-09-01 14:21:39,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:39,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:39,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-09-01 14:21:39,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:42,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:21:47,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:21:47,662 WARN L839 $PredicateComparison]: unable to prove that (and (<= 1 |c_thread2Thread1of1ForFork0_~cond~1#1|) (<= c_~v_assert~0 1) (<= |c_thread2Thread1of1ForFork0_~cond~1#1| 1) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-09-01 14:21:48,077 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~W~0 1))) (and (<= 1 |c_thread2Thread1of1ForFork0_~cond~1#1|) (<= c_~v_assert~0 1) (<= |c_thread2Thread1of1ForFork0_~cond~1#1| 1) (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) (< c_~back~0 0)) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) is different from false [2023-09-01 14:21:50,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:21:52,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:21:53,375 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~W~0 1))) (and (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) (< c_~back~0 0)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) is different from false [2023-09-01 14:21:56,449 INFO L130 PetriNetUnfolder]: 2611/4397 cut-off events. [2023-09-01 14:21:56,449 INFO L131 PetriNetUnfolder]: For 2437/2437 co-relation queries the response was YES. [2023-09-01 14:21:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 4397 events. 2611/4397 cut-off events. For 2437/2437 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25960 event pairs, 61 based on Foata normal form. 49/4091 useless extension candidates. Maximal degree in co-relation 11717. Up to 906 conditions per place. [2023-09-01 14:21:56,473 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 440 selfloop transitions, 225 changer transitions 106/771 dead transitions. [2023-09-01 14:21:56,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 771 transitions, 3852 flow [2023-09-01 14:21:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-09-01 14:21:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-09-01 14:21:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 8248 transitions. [2023-09-01 14:21:56,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802391954335417 [2023-09-01 14:21:56,499 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 8248 transitions. [2023-09-01 14:21:56,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 8248 transitions. [2023-09-01 14:21:56,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:56,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 8248 transitions. [2023-09-01 14:21:56,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 79.3076923076923) internal successors, (8248), 104 states have internal predecessors, (8248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:56,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 283.0) internal successors, (29715), 105 states have internal predecessors, (29715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:56,578 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 283.0) internal successors, (29715), 105 states have internal predecessors, (29715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:56,579 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 104 states and 8248 transitions. [2023-09-01 14:21:56,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 771 transitions, 3852 flow [2023-09-01 14:21:56,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 771 transitions, 3824 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 14:21:56,647 INFO L231 Difference]: Finished difference. Result has 201 places, 270 transitions, 1881 flow [2023-09-01 14:21:56,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=1881, PETRI_PLACES=201, PETRI_TRANSITIONS=270} [2023-09-01 14:21:56,649 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 169 predicate places. [2023-09-01 14:21:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 270 transitions, 1881 flow [2023-09-01 14:21:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:56,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:56,651 INFO L208 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] [2023-09-01 14:21:56,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:21:56,856 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 [2023-09-01 14:21:56,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:21:56,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash -708902324, now seen corresponding path program 2 times [2023-09-01 14:21:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800198073] [2023-09-01 14:21:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:57,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800198073] [2023-09-01 14:21:57,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800198073] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:21:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773141699] [2023-09-01 14:21:57,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:21:57,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:21:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:57,917 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) [2023-09-01 14:21:57,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:21:58,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:21:58,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:21:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:21:58,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:21:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:21:58,285 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:21:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:21:58,343 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:21:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:21:58,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:21:58,689 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_175 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-09-01 14:21:58,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:21:58,708 INFO L350 Elim1Store]: Elim1 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 190 treesize of output 174 [2023-09-01 14:21:58,718 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 29 [2023-09-01 14:21:58,723 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 24 [2023-09-01 14:21:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:21:58,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773141699] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:21:58,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:21:58,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2023-09-01 14:21:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048294661] [2023-09-01 14:21:58,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:21:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:21:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:21:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=876, Unknown=5, NotChecked=60, Total=1056 [2023-09-01 14:21:59,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 283 [2023-09-01 14:21:59,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 270 transitions, 1881 flow. Second operand has 33 states, 33 states have (on average 76.93939393939394) internal successors, (2539), 33 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:21:59,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:59,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 283 [2023-09-01 14:21:59,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:03,076 INFO L130 PetriNetUnfolder]: 3062/5303 cut-off events. [2023-09-01 14:22:03,076 INFO L131 PetriNetUnfolder]: For 173725/173725 co-relation queries the response was YES. [2023-09-01 14:22:03,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 5303 events. 3062/5303 cut-off events. For 173725/173725 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 32679 event pairs, 102 based on Foata normal form. 44/5343 useless extension candidates. Maximal degree in co-relation 32103. Up to 1188 conditions per place. [2023-09-01 14:22:03,183 INFO L137 encePairwiseOnDemand]: 270/283 looper letters, 335 selfloop transitions, 254 changer transitions 97/686 dead transitions. [2023-09-01 14:22:03,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 686 transitions, 7877 flow [2023-09-01 14:22:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:22:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:22:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3602 transitions. [2023-09-01 14:22:03,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2892707998715066 [2023-09-01 14:22:03,193 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3602 transitions. [2023-09-01 14:22:03,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3602 transitions. [2023-09-01 14:22:03,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:22:03,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3602 transitions. [2023-09-01 14:22:03,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 81.86363636363636) internal successors, (3602), 44 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:03,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 283.0) internal successors, (12735), 45 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:03,219 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 283.0) internal successors, (12735), 45 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:03,219 INFO L175 Difference]: Start difference. First operand has 201 places, 270 transitions, 1881 flow. Second operand 44 states and 3602 transitions. [2023-09-01 14:22:03,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 686 transitions, 7877 flow [2023-09-01 14:22:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 686 transitions, 7492 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-09-01 14:22:03,428 INFO L231 Difference]: Finished difference. Result has 243 places, 378 transitions, 3391 flow [2023-09-01 14:22:03,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3391, PETRI_PLACES=243, PETRI_TRANSITIONS=378} [2023-09-01 14:22:03,430 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 211 predicate places. [2023-09-01 14:22:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 378 transitions, 3391 flow [2023-09-01 14:22:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.93939393939394) internal successors, (2539), 33 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:03,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:22:03,431 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:22:03,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:22:03,637 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 [2023-09-01 14:22:03,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:22:03,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:22:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1109082783, now seen corresponding path program 3 times [2023-09-01 14:22:03,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:22:03,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122680541] [2023-09-01 14:22:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:22:03,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:22:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:22:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:22:03,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:22:03,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122680541] [2023-09-01 14:22:03,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122680541] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:22:03,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:22:03,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:22:03,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898631951] [2023-09-01 14:22:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:22:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:22:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:22:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:22:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:22:03,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-09-01 14:22:03,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 378 transitions, 3391 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:03,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:22:03,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-09-01 14:22:03,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:05,430 INFO L130 PetriNetUnfolder]: 3456/6812 cut-off events. [2023-09-01 14:22:05,430 INFO L131 PetriNetUnfolder]: For 242350/242786 co-relation queries the response was YES. [2023-09-01 14:22:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46510 conditions, 6812 events. 3456/6812 cut-off events. For 242350/242786 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 52209 event pairs, 707 based on Foata normal form. 357/7017 useless extension candidates. Maximal degree in co-relation 46322. Up to 2708 conditions per place. [2023-09-01 14:22:05,532 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 370 selfloop transitions, 56 changer transitions 49/577 dead transitions. [2023-09-01 14:22:05,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 577 transitions, 6111 flow [2023-09-01 14:22:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:22:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:22:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-09-01 14:22:05,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035335689045937 [2023-09-01 14:22:05,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-09-01 14:22:05,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-09-01 14:22:05,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:22:05,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-09-01 14:22:05,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:05,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:05,538 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:05,538 INFO L175 Difference]: Start difference. First operand has 243 places, 378 transitions, 3391 flow. Second operand 4 states and 570 transitions. [2023-09-01 14:22:05,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 577 transitions, 6111 flow [2023-09-01 14:22:05,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 577 transitions, 5602 flow, removed 96 selfloop flow, removed 18 redundant places. [2023-09-01 14:22:05,981 INFO L231 Difference]: Finished difference. Result has 224 places, 402 transitions, 3553 flow [2023-09-01 14:22:05,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3553, PETRI_PLACES=224, PETRI_TRANSITIONS=402} [2023-09-01 14:22:05,983 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 192 predicate places. [2023-09-01 14:22:05,983 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 402 transitions, 3553 flow [2023-09-01 14:22:05,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:05,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:22:05,983 INFO L208 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] [2023-09-01 14:22:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:22:05,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:22:05,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:22:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1636994766, now seen corresponding path program 4 times [2023-09-01 14:22:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:22:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864492534] [2023-09-01 14:22:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:22:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:22:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:22:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:22:06,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:22:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864492534] [2023-09-01 14:22:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864492534] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:22:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970460210] [2023-09-01 14:22:06,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:22:06,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:22:06,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:22:06,101 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) [2023-09-01 14:22:06,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:22:06,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:22:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:22:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:22:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:22:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:22:06,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:22:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:22:06,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970460210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:22:06,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:22:06,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 14:22:06,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058197368] [2023-09-01 14:22:06,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:22:06,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:22:06,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:22:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:22:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:22:06,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-09-01 14:22:06,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 402 transitions, 3553 flow. Second operand has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:06,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:22:06,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-09-01 14:22:06,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:07,499 INFO L130 PetriNetUnfolder]: 2839/5773 cut-off events. [2023-09-01 14:22:07,500 INFO L131 PetriNetUnfolder]: For 193834/194235 co-relation queries the response was YES. [2023-09-01 14:22:07,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38600 conditions, 5773 events. 2839/5773 cut-off events. For 193834/194235 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 43689 event pairs, 1356 based on Foata normal form. 95/5760 useless extension candidates. Maximal degree in co-relation 38523. Up to 4402 conditions per place. [2023-09-01 14:22:07,561 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 232 selfloop transitions, 3 changer transitions 36/354 dead transitions. [2023-09-01 14:22:07,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 354 transitions, 3795 flow [2023-09-01 14:22:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:22:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:22:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 778 transitions. [2023-09-01 14:22:07,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581861012956419 [2023-09-01 14:22:07,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 778 transitions. [2023-09-01 14:22:07,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 778 transitions. [2023-09-01 14:22:07,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:22:07,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 778 transitions. [2023-09-01 14:22:07,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:07,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:07,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:07,568 INFO L175 Difference]: Start difference. First operand has 224 places, 402 transitions, 3553 flow. Second operand 6 states and 778 transitions. [2023-09-01 14:22:07,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 354 transitions, 3795 flow [2023-09-01 14:22:07,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 354 transitions, 3528 flow, removed 55 selfloop flow, removed 13 redundant places. [2023-09-01 14:22:07,852 INFO L231 Difference]: Finished difference. Result has 200 places, 318 transitions, 2680 flow [2023-09-01 14:22:07,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2680, PETRI_PLACES=200, PETRI_TRANSITIONS=318} [2023-09-01 14:22:07,855 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 168 predicate places. [2023-09-01 14:22:07,855 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 318 transitions, 2680 flow [2023-09-01 14:22:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:22:07,856 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:22:07,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:22:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:22:08,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:22:08,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:22:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1848755015, now seen corresponding path program 5 times [2023-09-01 14:22:08,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:22:08,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429959022] [2023-09-01 14:22:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:22:08,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:22:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:22:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:22:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429959022] [2023-09-01 14:22:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429959022] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:22:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862150359] [2023-09-01 14:22:09,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:22:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:22:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:22:09,303 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) [2023-09-01 14:22:09,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:22:09,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:22:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:22:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 14:22:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:22:09,529 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-09-01 14:22:09,592 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:22:09,690 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:22:09,756 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:22:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:10,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:22:11,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:22:11,153 INFO L350 Elim1Store]: Elim1 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 133 treesize of output 97 [2023-09-01 14:22:11,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:22:11,186 INFO L350 Elim1Store]: Elim1 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 2242 treesize of output 2142 [2023-09-01 14:22:11,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:22:11,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 394 treesize of output 404 [2023-09-01 14:22:11,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:22:11,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 478 treesize of output 410 [2023-09-01 14:22:11,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:22:11,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 315 treesize of output 299 [2023-09-01 14:22:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:16,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862150359] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:22:16,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:22:16,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2023-09-01 14:22:16,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046283655] [2023-09-01 14:22:16,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:22:16,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 14:22:16,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:22:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 14:22:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1817, Unknown=5, NotChecked=0, Total=2070 [2023-09-01 14:22:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-09-01 14:22:17,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 318 transitions, 2680 flow. Second operand has 46 states, 46 states have (on average 73.71739130434783) internal successors, (3391), 46 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:22:17,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:22:17,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-09-01 14:22:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:28,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:22:31,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:23:00,026 INFO L130 PetriNetUnfolder]: 14793/25984 cut-off events. [2023-09-01 14:23:00,026 INFO L131 PetriNetUnfolder]: For 534212/534212 co-relation queries the response was YES. [2023-09-01 14:23:00,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154673 conditions, 25984 events. 14793/25984 cut-off events. For 534212/534212 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 213904 event pairs, 1282 based on Foata normal form. 140/26124 useless extension candidates. Maximal degree in co-relation 154606. Up to 5735 conditions per place. [2023-09-01 14:23:00,351 INFO L137 encePairwiseOnDemand]: 268/283 looper letters, 973 selfloop transitions, 1508 changer transitions 264/2745 dead transitions. [2023-09-01 14:23:00,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2745 transitions, 29825 flow [2023-09-01 14:23:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-09-01 14:23:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2023-09-01 14:23:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 12992 transitions. [2023-09-01 14:23:00,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27992760492975954 [2023-09-01 14:23:00,378 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 12992 transitions. [2023-09-01 14:23:00,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 12992 transitions. [2023-09-01 14:23:00,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:23:00,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 12992 transitions. [2023-09-01 14:23:00,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 79.21951219512195) internal successors, (12992), 164 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:00,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 283.0) internal successors, (46695), 165 states have internal predecessors, (46695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:00,469 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 283.0) internal successors, (46695), 165 states have internal predecessors, (46695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:00,470 INFO L175 Difference]: Start difference. First operand has 200 places, 318 transitions, 2680 flow. Second operand 164 states and 12992 transitions. [2023-09-01 14:23:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2745 transitions, 29825 flow [2023-09-01 14:23:01,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 2745 transitions, 29165 flow, removed 327 selfloop flow, removed 12 redundant places. [2023-09-01 14:23:01,574 INFO L231 Difference]: Finished difference. Result has 392 places, 1714 transitions, 22372 flow [2023-09-01 14:23:01,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=22372, PETRI_PLACES=392, PETRI_TRANSITIONS=1714} [2023-09-01 14:23:01,575 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 360 predicate places. [2023-09-01 14:23:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1714 transitions, 22372 flow [2023-09-01 14:23:01,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 73.71739130434783) internal successors, (3391), 46 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:23:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:23:01,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:23:01,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:23:01,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:23:01,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:23:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1061294861, now seen corresponding path program 6 times [2023-09-01 14:23:01,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:23:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444564249] [2023-09-01 14:23:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:23:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:23:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:23:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:23:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444564249] [2023-09-01 14:23:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444564249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:23:03,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517062043] [2023-09-01 14:23:03,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:23:03,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:23:03,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:23:03,027 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) [2023-09-01 14:23:03,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:23:03,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:23:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:23:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 14:23:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:23:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:04,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:23:04,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:23:04,636 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 53 [2023-09-01 14:23:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:05,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517062043] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:23:05,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:23:05,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-09-01 14:23:05,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172175010] [2023-09-01 14:23:05,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:23:05,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:23:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:23:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:23:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 14:23:07,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 283 [2023-09-01 14:23:07,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1714 transitions, 22372 flow. Second operand has 44 states, 44 states have (on average 98.8409090909091) internal successors, (4349), 44 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:07,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:23:07,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 283 [2023-09-01 14:23:07,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:23:43,633 INFO L130 PetriNetUnfolder]: 31441/54959 cut-off events. [2023-09-01 14:23:43,633 INFO L131 PetriNetUnfolder]: For 2328502/2328502 co-relation queries the response was YES. [2023-09-01 14:23:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445669 conditions, 54959 events. 31441/54959 cut-off events. For 2328502/2328502 co-relation queries the response was YES. Maximal size of possible extension queue 2240. Compared 500386 event pairs, 2077 based on Foata normal form. 509/55468 useless extension candidates. Maximal degree in co-relation 445553. Up to 9377 conditions per place. [2023-09-01 14:23:45,166 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 1546 selfloop transitions, 3161 changer transitions 688/5395 dead transitions. [2023-09-01 14:23:45,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 5395 transitions, 80491 flow [2023-09-01 14:23:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-09-01 14:23:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2023-09-01 14:23:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 22039 transitions. [2023-09-01 14:23:45,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673411560770718 [2023-09-01 14:23:45,190 INFO L72 ComplementDD]: Start complementDD. Operand 212 states and 22039 transitions. [2023-09-01 14:23:45,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 212 states and 22039 transitions. [2023-09-01 14:23:45,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:23:45,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 212 states and 22039 transitions. [2023-09-01 14:23:45,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 213 states, 212 states have (on average 103.95754716981132) internal successors, (22039), 212 states have internal predecessors, (22039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:45,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 213 states, 213 states have (on average 283.0) internal successors, (60279), 213 states have internal predecessors, (60279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:45,285 INFO L81 ComplementDD]: Finished complementDD. Result has 213 states, 213 states have (on average 283.0) internal successors, (60279), 213 states have internal predecessors, (60279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:23:45,285 INFO L175 Difference]: Start difference. First operand has 392 places, 1714 transitions, 22372 flow. Second operand 212 states and 22039 transitions. [2023-09-01 14:23:45,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 5395 transitions, 80491 flow [2023-09-01 14:24:21,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 5395 transitions, 66746 flow, removed 6290 selfloop flow, removed 17 redundant places. [2023-09-01 14:24:21,068 INFO L231 Difference]: Finished difference. Result has 634 places, 3574 transitions, 48075 flow [2023-09-01 14:24:21,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=15630, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=212, PETRI_FLOW=48075, PETRI_PLACES=634, PETRI_TRANSITIONS=3574} [2023-09-01 14:24:21,070 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 602 predicate places. [2023-09-01 14:24:21,070 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 3574 transitions, 48075 flow [2023-09-01 14:24:21,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 98.8409090909091) internal successors, (4349), 44 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:24:21,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:24:21,071 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:24:21,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:24:21,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 14:24:21,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:24:21,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:24:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash 802123443, now seen corresponding path program 7 times [2023-09-01 14:24:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:24:21,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129967062] [2023-09-01 14:24:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:24:21,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:24:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:24:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:24:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129967062] [2023-09-01 14:24:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129967062] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:24:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625838452] [2023-09-01 14:24:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:24:22,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:24:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:24:22,801 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) [2023-09-01 14:24:22,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:24:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:24:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 14:24:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:24:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:23,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:24:24,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:24:24,074 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 53 [2023-09-01 14:24:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:24,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625838452] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:24:24,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:24:24,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2023-09-01 14:24:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087469858] [2023-09-01 14:24:24,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:24:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 14:24:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:24:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 14:24:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2023-09-01 14:24:26,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 283 [2023-09-01 14:24:26,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 3574 transitions, 48075 flow. Second operand has 46 states, 46 states have (on average 91.78260869565217) internal successors, (4222), 46 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:24:26,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:24:26,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 283 [2023-09-01 14:24:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:25:28,937 INFO L130 PetriNetUnfolder]: 33735/60519 cut-off events. [2023-09-01 14:25:28,937 INFO L131 PetriNetUnfolder]: For 3604138/3604138 co-relation queries the response was YES. [2023-09-01 14:25:31,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514294 conditions, 60519 events. 33735/60519 cut-off events. For 3604138/3604138 co-relation queries the response was YES. Maximal size of possible extension queue 2353. Compared 578498 event pairs, 2865 based on Foata normal form. 2036/62555 useless extension candidates. Maximal degree in co-relation 514133. Up to 12898 conditions per place. [2023-09-01 14:25:31,346 INFO L137 encePairwiseOnDemand]: 266/283 looper letters, 1978 selfloop transitions, 2546 changer transitions 957/5481 dead transitions. [2023-09-01 14:25:31,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 5481 transitions, 85863 flow [2023-09-01 14:25:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2023-09-01 14:25:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2023-09-01 14:25:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 25607 transitions. [2023-09-01 14:25:31,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34144942996199745 [2023-09-01 14:25:31,371 INFO L72 ComplementDD]: Start complementDD. Operand 265 states and 25607 transitions. [2023-09-01 14:25:31,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 265 states and 25607 transitions. [2023-09-01 14:25:31,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:25:31,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 265 states and 25607 transitions. [2023-09-01 14:25:31,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 266 states, 265 states have (on average 96.63018867924528) internal successors, (25607), 265 states have internal predecessors, (25607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:25:31,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 266 states, 266 states have (on average 283.0) internal successors, (75278), 266 states have internal predecessors, (75278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:25:31,471 INFO L81 ComplementDD]: Finished complementDD. Result has 266 states, 266 states have (on average 283.0) internal successors, (75278), 266 states have internal predecessors, (75278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:25:31,472 INFO L175 Difference]: Start difference. First operand has 634 places, 3574 transitions, 48075 flow. Second operand 265 states and 25607 transitions. [2023-09-01 14:25:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 5481 transitions, 85863 flow [2023-09-01 14:26:22,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 5481 transitions, 76531 flow, removed 2816 selfloop flow, removed 76 redundant places. [2023-09-01 14:26:22,542 INFO L231 Difference]: Finished difference. Result has 837 places, 3362 transitions, 53544 flow [2023-09-01 14:26:22,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=22160, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=265, PETRI_FLOW=53544, PETRI_PLACES=837, PETRI_TRANSITIONS=3362} [2023-09-01 14:26:22,544 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 805 predicate places. [2023-09-01 14:26:22,545 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 3362 transitions, 53544 flow [2023-09-01 14:26:22,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 91.78260869565217) internal successors, (4222), 46 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:22,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:22,546 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:26:22,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:26:22,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:26:22,754 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:26:22,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1542836471, now seen corresponding path program 8 times [2023-09-01 14:26:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639294477] [2023-09-01 14:26:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639294477] [2023-09-01 14:26:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639294477] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:26:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852047640] [2023-09-01 14:26:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:26:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:26:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:26:23,701 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) [2023-09-01 14:26:23,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:26:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:26:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:26:23,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 14:26:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:26:24,639 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:26:24,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:26:24,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2023-09-01 14:26:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:26:25,145 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:26:25,146 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 53 [2023-09-01 14:26:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852047640] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:26:25,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:26:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-09-01 14:26:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555425804] [2023-09-01 14:26:25,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:26:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:26:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:26:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 14:26:27,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 283 [2023-09-01 14:26:27,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 3362 transitions, 53544 flow. Second operand has 44 states, 44 states have (on average 98.79545454545455) internal successors, (4347), 44 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:27,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:27,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 283 [2023-09-01 14:26:27,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:28:08,813 INFO L130 PetriNetUnfolder]: 54300/96106 cut-off events. [2023-09-01 14:28:08,814 INFO L131 PetriNetUnfolder]: For 13616592/13616592 co-relation queries the response was YES. [2023-09-01 14:28:14,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078681 conditions, 96106 events. 54300/96106 cut-off events. For 13616592/13616592 co-relation queries the response was YES. Maximal size of possible extension queue 3674. Compared 948428 event pairs, 4360 based on Foata normal form. 760/96866 useless extension candidates. Maximal degree in co-relation 1078450. Up to 21561 conditions per place. [2023-09-01 14:28:14,582 INFO L137 encePairwiseOnDemand]: 266/283 looper letters, 1971 selfloop transitions, 4778 changer transitions 1737/8486 dead transitions. [2023-09-01 14:28:14,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 8486 transitions, 160628 flow [2023-09-01 14:28:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2023-09-01 14:28:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2023-09-01 14:28:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 23964 transitions. [2023-09-01 14:28:14,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3665733559726493 [2023-09-01 14:28:14,604 INFO L72 ComplementDD]: Start complementDD. Operand 231 states and 23964 transitions. [2023-09-01 14:28:14,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 231 states and 23964 transitions. [2023-09-01 14:28:14,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:28:14,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 231 states and 23964 transitions. [2023-09-01 14:28:14,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 232 states, 231 states have (on average 103.74025974025975) internal successors, (23964), 231 states have internal predecessors, (23964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:28:14,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 232 states, 232 states have (on average 283.0) internal successors, (65656), 232 states have internal predecessors, (65656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:28:14,691 INFO L81 ComplementDD]: Finished complementDD. Result has 232 states, 232 states have (on average 283.0) internal successors, (65656), 232 states have internal predecessors, (65656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:28:14,692 INFO L175 Difference]: Start difference. First operand has 837 places, 3362 transitions, 53544 flow. Second operand 231 states and 23964 transitions. [2023-09-01 14:28:14,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 8486 transitions, 160628 flow [2023-09-01 14:32:23,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1007 places, 8486 transitions, 142674 flow, removed 8623 selfloop flow, removed 39 redundant places. [2023-09-01 14:32:23,369 INFO L231 Difference]: Finished difference. Result has 1084 places, 5655 transitions, 102705 flow [2023-09-01 14:32:23,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=48235, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=231, PETRI_FLOW=102705, PETRI_PLACES=1084, PETRI_TRANSITIONS=5655} [2023-09-01 14:32:23,372 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1052 predicate places. [2023-09-01 14:32:23,373 INFO L495 AbstractCegarLoop]: Abstraction has has 1084 places, 5655 transitions, 102705 flow [2023-09-01 14:32:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 98.79545454545455) internal successors, (4347), 44 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:23,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:23,374 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 14:32:23,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:23,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:23,580 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:23,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 72352195, now seen corresponding path program 9 times [2023-09-01 14:32:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:23,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963174772] [2023-09-01 14:32:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963174772] [2023-09-01 14:32:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963174772] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566875521] [2023-09-01 14:32:24,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:32:24,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:24,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:24,733 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) [2023-09-01 14:32:24,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:32:25,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:32:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjunts are in the unsatisfiable core [2023-09-01 14:32:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:25,349 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:32:25,424 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:32:25,559 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:32:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:25,877 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-09-01 14:32:26,132 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:32:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:26,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:26,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2023-09-01 14:32:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:26,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:29,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:29,309 INFO L350 Elim1Store]: Elim1 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 126 treesize of output 90 [2023-09-01 14:32:29,364 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:32:29,365 INFO L350 Elim1Store]: Elim1 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 4074 treesize of output 3806 [2023-09-01 14:32:29,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:29,400 INFO L350 Elim1Store]: Elim1 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 106 treesize of output 54 [2023-09-01 14:32:29,460 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:32:29,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 227 treesize of output 238 [2023-09-01 14:32:29,508 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:32:29,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 202 treesize of output 188 [2023-09-01 14:32:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566875521] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:31,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2023-09-01 14:32:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556492070] [2023-09-01 14:32:31,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:31,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 14:32:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 14:32:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2081, Unknown=5, NotChecked=0, Total=2352 [2023-09-01 14:32:34,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:36,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:39,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:41,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:43,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:43,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-09-01 14:32:43,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 5655 transitions, 102705 flow. Second operand has 49 states, 49 states have (on average 73.6734693877551) internal successors, (3610), 49 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:43,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:43,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-09-01 14:32:43,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:48,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:53,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:55,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:58,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:02,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:04,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:08,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:10,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:16,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:19,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:21,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:23,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:27,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:35,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:41,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:43,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:46,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:48,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:54,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:07,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:14,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:16,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:26,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:32,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:34,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:36,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15