./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:13:08,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:13:08,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:13:08,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:13:08,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:13:08,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:13:08,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:13:08,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:13:08,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:13:08,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:13:08,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:13:08,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:13:08,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:13:08,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:13:08,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:13:08,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:13:08,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:13:08,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:13:08,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:13:08,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:13:08,576 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:13:08,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:13:08,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:13:08,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:13:08,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:13:08,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:13:08,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:13:08,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:13:08,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:13:08,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:13:08,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:13:08,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:13:08,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:13:08,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:13:08,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:13:08,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:13:08,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:13:08,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:13:08,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:13:08,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:13:08,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:13:08,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:13:08,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:13:08,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:13:08,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:13:08,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:13:08,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:13:08,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:13:08,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:13:08,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:13:08,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:13:08,637 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:13:08,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:13:08,638 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:13:08,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:13:08,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:13:08,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:13:08,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:13:08,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:13:08,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:13:08,640 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:13:08,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:13:08,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:13:08,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:13:08,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:13:08,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:13:08,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:13:08,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:08,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:13:08,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:13:08,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:13:08,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:13:08,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:13:08,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:13:08,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:13:08,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:13:08,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-07-21 09:13:08,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:13:08,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:13:08,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:13:08,949 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:13:08,951 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:13:08,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-21 09:13:09,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e32969230/6a0f4997de114e72bc8de769a0c3adb5/FLAG4b39de473 [2022-07-21 09:13:09,386 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:13:09,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-21 09:13:09,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e32969230/6a0f4997de114e72bc8de769a0c3adb5/FLAG4b39de473 [2022-07-21 09:13:09,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e32969230/6a0f4997de114e72bc8de769a0c3adb5 [2022-07-21 09:13:09,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:13:09,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:13:09,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:09,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:13:09,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:13:09,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da0e241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09, skipping insertion in model container [2022-07-21 09:13:09,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:13:09,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:13:09,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-07-21 09:13:09,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:09,610 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:13:09,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-07-21 09:13:09,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:09,657 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:13:09,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09 WrapperNode [2022-07-21 09:13:09,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:09,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:09,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:13:09,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:13:09,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,689 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-21 09:13:09,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:09,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:13:09,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:13:09,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:13:09,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:13:09,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:13:09,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:13:09,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:13:09,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:09,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:13:09,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:13:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:13:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:13:09,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:13:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:13:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:13:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:13:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:13:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:13:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:13:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:13:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:13:09,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:13:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:13:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:13:09,803 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:13:09,898 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:13:09,899 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:13:10,110 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:13:10,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:13:10,153 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:13:10,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:10 BoogieIcfgContainer [2022-07-21 09:13:10,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:13:10,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:13:10,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:13:10,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:13:10,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:13:09" (1/3) ... [2022-07-21 09:13:10,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e21e145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:10, skipping insertion in model container [2022-07-21 09:13:10,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (2/3) ... [2022-07-21 09:13:10,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e21e145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:10, skipping insertion in model container [2022-07-21 09:13:10,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:10" (3/3) ... [2022-07-21 09:13:10,165 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-07-21 09:13:10,169 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:13:10,176 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:13:10,176 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:13:10,176 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:13:10,245 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:13:10,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-07-21 09:13:10,340 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 09:13:10,341 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:13:10,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-07-21 09:13:10,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-07-21 09:13:10,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-07-21 09:13:10,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:13:10,375 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7fd77c16, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fb649d2 [2022-07-21 09:13:10,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:13:10,404 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-07-21 09:13:10,405 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:13:10,405 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:10,406 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:10,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-07-21 09:13:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507160579] [2022-07-21 09:13:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507160579] [2022-07-21 09:13:10,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507160579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:10,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:10,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:13:10,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685614059] [2022-07-21 09:13:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:10,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:10,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:13:10,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-07-21 09:13:10,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:10,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-07-21 09:13:10,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:10,861 INFO L129 PetriNetUnfolder]: 64/185 cut-off events. [2022-07-21 09:13:10,861 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 09:13:10,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 185 events. 64/185 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 555 event pairs, 25 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 257. Up to 81 conditions per place. [2022-07-21 09:13:10,865 INFO L132 encePairwiseOnDemand]: 72/82 looper letters, 26 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2022-07-21 09:13:10,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 231 flow [2022-07-21 09:13:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 352 transitions. [2022-07-21 09:13:10,878 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2022-07-21 09:13:10,878 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 352 transitions. [2022-07-21 09:13:10,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 352 transitions. [2022-07-21 09:13:10,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:10,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 352 transitions. [2022-07-21 09:13:10,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,900 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,901 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 6 states and 352 transitions. [2022-07-21 09:13:10,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 231 flow [2022-07-21 09:13:10,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 221 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:10,924 INFO L242 Difference]: Finished difference. Result has 74 places, 66 transitions, 152 flow [2022-07-21 09:13:10,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2022-07-21 09:13:10,928 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2022-07-21 09:13:10,932 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 152 flow [2022-07-21 09:13:10,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:10,933 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:13:10,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1831791135, now seen corresponding path program 1 times [2022-07-21 09:13:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:10,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846293986] [2022-07-21 09:13:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:11,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846293986] [2022-07-21 09:13:11,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846293986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:11,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:11,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:11,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918112202] [2022-07-21 09:13:11,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:11,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:11,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-21 09:13:11,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:11,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-21 09:13:11,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:11,194 INFO L129 PetriNetUnfolder]: 87/281 cut-off events. [2022-07-21 09:13:11,194 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-21 09:13:11,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 281 events. 87/281 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1072 event pairs, 39 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 358. Up to 113 conditions per place. [2022-07-21 09:13:11,198 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-07-21 09:13:11,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 291 flow [2022-07-21 09:13:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-07-21 09:13:11,210 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-07-21 09:13:11,210 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-07-21 09:13:11,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-07-21 09:13:11,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:11,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-07-21 09:13:11,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,218 INFO L186 Difference]: Start difference. First operand has 74 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-07-21 09:13:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 291 flow [2022-07-21 09:13:11,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:11,221 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 170 flow [2022-07-21 09:13:11,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-07-21 09:13:11,223 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-07-21 09:13:11,223 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 170 flow [2022-07-21 09:13:11,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:11,224 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:13:11,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash -188749577, now seen corresponding path program 2 times [2022-07-21 09:13:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:11,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651315262] [2022-07-21 09:13:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:11,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:11,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651315262] [2022-07-21 09:13:11,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651315262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:11,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220479347] [2022-07-21 09:13:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:11,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:11,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:11,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:11,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:13:11,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:13:11,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:13:11,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:11,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:13:11,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220479347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:11,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:13:11,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-07-21 09:13:11,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929677527] [2022-07-21 09:13:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:13:11,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-07-21 09:13:11,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:11,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-07-21 09:13:11,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:11,760 INFO L129 PetriNetUnfolder]: 44/168 cut-off events. [2022-07-21 09:13:11,760 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-07-21 09:13:11,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 168 events. 44/168 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 540 event pairs, 21 based on Foata normal form. 13/176 useless extension candidates. Maximal degree in co-relation 298. Up to 66 conditions per place. [2022-07-21 09:13:11,762 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-07-21 09:13:11,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 233 flow [2022-07-21 09:13:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:13:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:13:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-07-21 09:13:11,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-07-21 09:13:11,766 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-07-21 09:13:11,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-07-21 09:13:11,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:11,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-07-21 09:13:11,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,771 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,771 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-07-21 09:13:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 233 flow [2022-07-21 09:13:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:11,774 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 168 flow [2022-07-21 09:13:11,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-07-21 09:13:11,775 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-07-21 09:13:11,775 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 168 flow [2022-07-21 09:13:11,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:11,776 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:11,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:11,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:11,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash 285176305, now seen corresponding path program 1 times [2022-07-21 09:13:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412848609] [2022-07-21 09:13:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:12,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412848609] [2022-07-21 09:13:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412848609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211983138] [2022-07-21 09:13:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:12,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:12,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:12,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:13:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:13:12,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:12,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:12,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211983138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:12,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:12,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-07-21 09:13:12,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134352878] [2022-07-21 09:13:12,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:12,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:13:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:12,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:13:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:13:12,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-21 09:13:12,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:12,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-21 09:13:12,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:12,807 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-07-21 09:13:12,808 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-07-21 09:13:12,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 422 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 109. Up to 21 conditions per place. [2022-07-21 09:13:12,809 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-07-21 09:13:12,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 302 flow [2022-07-21 09:13:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-07-21 09:13:12,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-07-21 09:13:12,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-07-21 09:13:12,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-07-21 09:13:12,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:12,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-07-21 09:13:12,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,815 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-07-21 09:13:12,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 302 flow [2022-07-21 09:13:12,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:13:12,818 INFO L242 Difference]: Finished difference. Result has 80 places, 71 transitions, 197 flow [2022-07-21 09:13:12,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-07-21 09:13:12,818 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 8 predicate places. [2022-07-21 09:13:12,819 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 197 flow [2022-07-21 09:13:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:12,819 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:12,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:13:13,035 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,SelfDestructingSolverStorable3 [2022-07-21 09:13:13,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-07-21 09:13:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:13,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057342688] [2022-07-21 09:13:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:13,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057342688] [2022-07-21 09:13:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057342688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355585019] [2022-07-21 09:13:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:13,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:13,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:13:13,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:13,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:13:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:13,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:13,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355585019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:13,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:13,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-07-21 09:13:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786176393] [2022-07-21 09:13:13,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:13,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:13:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:13:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:13:13,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-07-21 09:13:13,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:13,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-07-21 09:13:13,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:13,501 INFO L129 PetriNetUnfolder]: 109/380 cut-off events. [2022-07-21 09:13:13,502 INFO L130 PetriNetUnfolder]: For 205/215 co-relation queries the response was YES. [2022-07-21 09:13:13,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 380 events. 109/380 cut-off events. For 205/215 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1810 event pairs, 27 based on Foata normal form. 15/388 useless extension candidates. Maximal degree in co-relation 820. Up to 124 conditions per place. [2022-07-21 09:13:13,504 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-07-21 09:13:13,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 414 flow [2022-07-21 09:13:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:13:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:13:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-07-21 09:13:13,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-07-21 09:13:13,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-07-21 09:13:13,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-07-21 09:13:13,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:13,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-07-21 09:13:13,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,510 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,510 INFO L186 Difference]: Start difference. First operand has 80 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-07-21 09:13:13,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 414 flow [2022-07-21 09:13:13,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:13:13,513 INFO L242 Difference]: Finished difference. Result has 87 places, 84 transitions, 338 flow [2022-07-21 09:13:13,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-07-21 09:13:13,514 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2022-07-21 09:13:13,515 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 338 flow [2022-07-21 09:13:13,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,515 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:13,515 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:13,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:13,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash 788007917, now seen corresponding path program 3 times [2022-07-21 09:13:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458227244] [2022-07-21 09:13:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458227244] [2022-07-21 09:13:13,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458227244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607059567] [2022-07-21 09:13:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:13,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:13,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:13:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:13:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:14,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:14,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607059567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:14,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:14,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-07-21 09:13:14,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647541851] [2022-07-21 09:13:14,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:14,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:13:14,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:13:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:13:14,195 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:14,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:14,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:14,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:15,413 INFO L129 PetriNetUnfolder]: 312/856 cut-off events. [2022-07-21 09:13:15,414 INFO L130 PetriNetUnfolder]: For 1304/1304 co-relation queries the response was YES. [2022-07-21 09:13:15,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 856 events. 312/856 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4684 event pairs, 12 based on Foata normal form. 29/884 useless extension candidates. Maximal degree in co-relation 2047. Up to 168 conditions per place. [2022-07-21 09:13:15,421 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-07-21 09:13:15,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 1960 flow [2022-07-21 09:13:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:13:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:13:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-07-21 09:13:15,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-07-21 09:13:15,430 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-07-21 09:13:15,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-07-21 09:13:15,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:15,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-07-21 09:13:15,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,450 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,450 INFO L186 Difference]: Start difference. First operand has 87 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-07-21 09:13:15,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 1960 flow [2022-07-21 09:13:15,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:15,483 INFO L242 Difference]: Finished difference. Result has 153 places, 206 transitions, 1422 flow [2022-07-21 09:13:15,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2022-07-21 09:13:15,484 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2022-07-21 09:13:15,484 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1422 flow [2022-07-21 09:13:15,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:15,485 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:15,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:15,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1695977387, now seen corresponding path program 4 times [2022-07-21 09:13:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651167887] [2022-07-21 09:13:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651167887] [2022-07-21 09:13:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651167887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787629850] [2022-07-21 09:13:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:15,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:15,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:13:15,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:15,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:15,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:13:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787629850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:16,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:16,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-07-21 09:13:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498053077] [2022-07-21 09:13:16,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:16,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:13:16,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:13:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-21 09:13:16,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:16,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:16,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:16,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:16,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:17,843 INFO L129 PetriNetUnfolder]: 789/2284 cut-off events. [2022-07-21 09:13:17,843 INFO L130 PetriNetUnfolder]: For 7863/7863 co-relation queries the response was YES. [2022-07-21 09:13:17,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 2284 events. 789/2284 cut-off events. For 7863/7863 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17196 event pairs, 50 based on Foata normal form. 124/2400 useless extension candidates. Maximal degree in co-relation 8060. Up to 444 conditions per place. [2022-07-21 09:13:17,866 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-07-21 09:13:17,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 6678 flow [2022-07-21 09:13:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:13:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:13:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-07-21 09:13:17,873 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-07-21 09:13:17,873 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-07-21 09:13:17,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-07-21 09:13:17,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:17,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-07-21 09:13:17,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,912 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,912 INFO L186 Difference]: Start difference. First operand has 153 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-07-21 09:13:17,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 6678 flow [2022-07-21 09:13:17,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-07-21 09:13:17,968 INFO L242 Difference]: Finished difference. Result has 237 places, 492 transitions, 4915 flow [2022-07-21 09:13:17,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=237, PETRI_TRANSITIONS=492} [2022-07-21 09:13:17,970 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-07-21 09:13:17,970 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 492 transitions, 4915 flow [2022-07-21 09:13:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:17,971 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:17,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:18,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1062102969, now seen corresponding path program 5 times [2022-07-21 09:13:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183746359] [2022-07-21 09:13:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183746359] [2022-07-21 09:13:18,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183746359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789703421] [2022-07-21 09:13:18,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:13:18,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:18,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:18,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:13:18,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:13:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:13:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:18,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789703421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:18,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:18,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-07-21 09:13:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149082018] [2022-07-21 09:13:18,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:13:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:13:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:13:18,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:18,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:18,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:18,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:18,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:20,022 INFO L129 PetriNetUnfolder]: 962/2727 cut-off events. [2022-07-21 09:13:20,022 INFO L130 PetriNetUnfolder]: For 23134/23134 co-relation queries the response was YES. [2022-07-21 09:13:20,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14524 conditions, 2727 events. 962/2727 cut-off events. For 23134/23134 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21657 event pairs, 22 based on Foata normal form. 33/2750 useless extension candidates. Maximal degree in co-relation 13882. Up to 512 conditions per place. [2022-07-21 09:13:20,060 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-07-21 09:13:20,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 746 transitions, 9027 flow [2022-07-21 09:13:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:13:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:13:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-07-21 09:13:20,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-07-21 09:13:20,064 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-07-21 09:13:20,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-07-21 09:13:20,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:20,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-07-21 09:13:20,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,074 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,074 INFO L186 Difference]: Start difference. First operand has 237 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-07-21 09:13:20,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 746 transitions, 9027 flow [2022-07-21 09:13:20,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-07-21 09:13:20,228 INFO L242 Difference]: Finished difference. Result has 286 places, 646 transitions, 8206 flow [2022-07-21 09:13:20,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=286, PETRI_TRANSITIONS=646} [2022-07-21 09:13:20,231 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 214 predicate places. [2022-07-21 09:13:20,232 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 646 transitions, 8206 flow [2022-07-21 09:13:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,233 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:20,233 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:20,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:20,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1632526143, now seen corresponding path program 6 times [2022-07-21 09:13:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:20,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271215645] [2022-07-21 09:13:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:20,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:20,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271215645] [2022-07-21 09:13:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271215645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064633079] [2022-07-21 09:13:20,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:13:20,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:20,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:20,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:13:20,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:13:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:20,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064633079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:20,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:20,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-21 09:13:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968793624] [2022-07-21 09:13:20,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:13:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:13:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:13:20,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:20,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:20,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:20,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:23,350 INFO L129 PetriNetUnfolder]: 1247/3668 cut-off events. [2022-07-21 09:13:23,352 INFO L130 PetriNetUnfolder]: For 46784/46784 co-relation queries the response was YES. [2022-07-21 09:13:23,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22547 conditions, 3668 events. 1247/3668 cut-off events. For 46784/46784 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31698 event pairs, 60 based on Foata normal form. 38/3674 useless extension candidates. Maximal degree in co-relation 21679. Up to 626 conditions per place. [2022-07-21 09:13:23,424 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-07-21 09:13:23,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1105 transitions, 16324 flow [2022-07-21 09:13:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-21 09:13:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-21 09:13:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-07-21 09:13:23,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-07-21 09:13:23,433 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-07-21 09:13:23,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-07-21 09:13:23,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:23,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-07-21 09:13:23,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:23,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:23,447 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:23,447 INFO L186 Difference]: Start difference. First operand has 286 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-07-21 09:13:23,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1105 transitions, 16324 flow [2022-07-21 09:13:23,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-07-21 09:13:23,668 INFO L242 Difference]: Finished difference. Result has 368 places, 944 transitions, 14092 flow [2022-07-21 09:13:23,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=368, PETRI_TRANSITIONS=944} [2022-07-21 09:13:23,669 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 296 predicate places. [2022-07-21 09:13:23,669 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 944 transitions, 14092 flow [2022-07-21 09:13:23,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:23,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:23,671 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:23,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:13:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:23,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -925173425, now seen corresponding path program 7 times [2022-07-21 09:13:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:23,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737051656] [2022-07-21 09:13:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737051656] [2022-07-21 09:13:23,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737051656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814847549] [2022-07-21 09:13:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:13:23,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:23,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:23,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:13:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:24,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:24,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:24,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814847549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:24,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:24,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-21 09:13:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813570053] [2022-07-21 09:13:24,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:13:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:13:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:13:24,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:24,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:24,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:24,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:24,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:26,397 INFO L129 PetriNetUnfolder]: 1335/3958 cut-off events. [2022-07-21 09:13:26,397 INFO L130 PetriNetUnfolder]: For 65581/65581 co-relation queries the response was YES. [2022-07-21 09:13:26,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27395 conditions, 3958 events. 1335/3958 cut-off events. For 65581/65581 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35053 event pairs, 32 based on Foata normal form. 2/3950 useless extension candidates. Maximal degree in co-relation 26336. Up to 674 conditions per place. [2022-07-21 09:13:26,463 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-07-21 09:13:26,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1216 transitions, 21058 flow [2022-07-21 09:13:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:13:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:13:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-07-21 09:13:26,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-07-21 09:13:26,467 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-07-21 09:13:26,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-07-21 09:13:26,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:26,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-07-21 09:13:26,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,476 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,476 INFO L186 Difference]: Start difference. First operand has 368 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-07-21 09:13:26,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1216 transitions, 21058 flow [2022-07-21 09:13:26,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1216 transitions, 20576 flow, removed 170 selfloop flow, removed 22 redundant places. [2022-07-21 09:13:26,872 INFO L242 Difference]: Finished difference. Result has 394 places, 1064 transitions, 17945 flow [2022-07-21 09:13:26,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13588, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17945, PETRI_PLACES=394, PETRI_TRANSITIONS=1064} [2022-07-21 09:13:26,873 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-07-21 09:13:26,874 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1064 transitions, 17945 flow [2022-07-21 09:13:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:26,874 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:26,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:13:27,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:13:27,088 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1862553847, now seen corresponding path program 8 times [2022-07-21 09:13:27,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206924367] [2022-07-21 09:13:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:27,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206924367] [2022-07-21 09:13:27,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206924367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:27,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793902659] [2022-07-21 09:13:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:27,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:13:27,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:27,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:27,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793902659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:27,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-21 09:13:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150939984] [2022-07-21 09:13:27,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:13:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:13:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:13:27,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:27,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1064 transitions, 17945 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:27,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:27,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:30,547 INFO L129 PetriNetUnfolder]: 1748/5156 cut-off events. [2022-07-21 09:13:30,547 INFO L130 PetriNetUnfolder]: For 94133/94133 co-relation queries the response was YES. [2022-07-21 09:13:30,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38289 conditions, 5156 events. 1748/5156 cut-off events. For 94133/94133 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 48232 event pairs, 75 based on Foata normal form. 43/5163 useless extension candidates. Maximal degree in co-relation 37018. Up to 927 conditions per place. [2022-07-21 09:13:30,637 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 338 selfloop transitions, 1244 changer transitions 3/1630 dead transitions. [2022-07-21 09:13:30,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1630 transitions, 30624 flow [2022-07-21 09:13:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 09:13:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-21 09:13:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-07-21 09:13:30,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-07-21 09:13:30,643 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-07-21 09:13:30,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-07-21 09:13:30,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:30,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-07-21 09:13:30,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,657 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,657 INFO L186 Difference]: Start difference. First operand has 394 places, 1064 transitions, 17945 flow. Second operand 63 states and 3837 transitions. [2022-07-21 09:13:30,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1630 transitions, 30624 flow [2022-07-21 09:13:31,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1630 transitions, 29455 flow, removed 187 selfloop flow, removed 21 redundant places. [2022-07-21 09:13:31,532 INFO L242 Difference]: Finished difference. Result has 454 places, 1485 transitions, 28896 flow [2022-07-21 09:13:31,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17203, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=28896, PETRI_PLACES=454, PETRI_TRANSITIONS=1485} [2022-07-21 09:13:31,533 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 382 predicate places. [2022-07-21 09:13:31,533 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1485 transitions, 28896 flow [2022-07-21 09:13:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:31,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:31,534 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:31,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:31,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:31,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash -167169759, now seen corresponding path program 9 times [2022-07-21 09:13:31,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832152351] [2022-07-21 09:13:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:31,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832152351] [2022-07-21 09:13:31,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832152351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:31,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144922834] [2022-07-21 09:13:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:31,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:31,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:31,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:13:31,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:13:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:32,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:32,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144922834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:32,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:32,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-21 09:13:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173157315] [2022-07-21 09:13:32,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:13:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:13:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:13:32,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:32,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1485 transitions, 28896 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:32,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:32,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:32,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:34,997 INFO L129 PetriNetUnfolder]: 1760/5259 cut-off events. [2022-07-21 09:13:34,997 INFO L130 PetriNetUnfolder]: For 117980/117980 co-relation queries the response was YES. [2022-07-21 09:13:35,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42899 conditions, 5259 events. 1760/5259 cut-off events. For 117980/117980 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49672 event pairs, 86 based on Foata normal form. 4/5220 useless extension candidates. Maximal degree in co-relation 42709. Up to 898 conditions per place. [2022-07-21 09:13:35,092 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1041 changer transitions 14/1639 dead transitions. [2022-07-21 09:13:35,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1639 transitions, 34707 flow [2022-07-21 09:13:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:13:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:13:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-07-21 09:13:35,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-07-21 09:13:35,098 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-07-21 09:13:35,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-07-21 09:13:35,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:35,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-07-21 09:13:35,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:35,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:35,113 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:35,113 INFO L186 Difference]: Start difference. First operand has 454 places, 1485 transitions, 28896 flow. Second operand 41 states and 2525 transitions. [2022-07-21 09:13:35,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1639 transitions, 34707 flow [2022-07-21 09:13:36,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1639 transitions, 34281 flow, removed 134 selfloop flow, removed 25 redundant places. [2022-07-21 09:13:36,224 INFO L242 Difference]: Finished difference. Result has 476 places, 1521 transitions, 31685 flow [2022-07-21 09:13:36,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28476, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31685, PETRI_PLACES=476, PETRI_TRANSITIONS=1521} [2022-07-21 09:13:36,226 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 404 predicate places. [2022-07-21 09:13:36,226 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1521 transitions, 31685 flow [2022-07-21 09:13:36,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:36,227 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:36,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:13:36,427 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:36,428 INFO L85 PathProgramCache]: Analyzing trace with hash -949462277, now seen corresponding path program 10 times [2022-07-21 09:13:36,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:36,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515602053] [2022-07-21 09:13:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:36,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:36,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515602053] [2022-07-21 09:13:36,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515602053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:36,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96649929] [2022-07-21 09:13:36,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:36,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:36,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:36,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:13:36,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:36,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:36,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96649929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:36,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:36,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-21 09:13:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198171190] [2022-07-21 09:13:36,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:36,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:13:36,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:13:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:13:36,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:36,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1521 transitions, 31685 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:36,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:36,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:39,614 INFO L129 PetriNetUnfolder]: 1761/5254 cut-off events. [2022-07-21 09:13:39,614 INFO L130 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2022-07-21 09:13:39,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44752 conditions, 5254 events. 1761/5254 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 49611 event pairs, 156 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 44518. Up to 900 conditions per place. [2022-07-21 09:13:39,697 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 656 selfloop transitions, 868 changer transitions 12/1581 dead transitions. [2022-07-21 09:13:39,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1581 transitions, 35757 flow [2022-07-21 09:13:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:13:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:13:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1295 transitions. [2022-07-21 09:13:39,700 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7520325203252033 [2022-07-21 09:13:39,700 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1295 transitions. [2022-07-21 09:13:39,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1295 transitions. [2022-07-21 09:13:39,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:39,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1295 transitions. [2022-07-21 09:13:39,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:39,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:39,705 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:39,705 INFO L186 Difference]: Start difference. First operand has 476 places, 1521 transitions, 31685 flow. Second operand 21 states and 1295 transitions. [2022-07-21 09:13:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1581 transitions, 35757 flow [2022-07-21 09:13:40,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1581 transitions, 34429 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-21 09:13:40,877 INFO L242 Difference]: Finished difference. Result has 471 places, 1527 transitions, 32263 flow [2022-07-21 09:13:40,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30388, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=32263, PETRI_PLACES=471, PETRI_TRANSITIONS=1527} [2022-07-21 09:13:40,879 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 399 predicate places. [2022-07-21 09:13:40,879 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1527 transitions, 32263 flow [2022-07-21 09:13:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:40,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:40,880 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:40,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 09:13:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:13:41,081 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash 258337235, now seen corresponding path program 11 times [2022-07-21 09:13:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:41,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600378710] [2022-07-21 09:13:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:41,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600378710] [2022-07-21 09:13:41,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600378710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150250836] [2022-07-21 09:13:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:13:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:41,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:41,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:13:41,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:13:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:13:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:41,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:41,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150250836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:41,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-21 09:13:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621197922] [2022-07-21 09:13:41,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:13:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:13:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:13:41,517 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:41,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1527 transitions, 32263 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:41,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:41,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:41,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:44,342 INFO L129 PetriNetUnfolder]: 2222/6104 cut-off events. [2022-07-21 09:13:44,343 INFO L130 PetriNetUnfolder]: For 160146/160146 co-relation queries the response was YES. [2022-07-21 09:13:44,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54762 conditions, 6104 events. 2222/6104 cut-off events. For 160146/160146 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 56585 event pairs, 71 based on Foata normal form. 1/6088 useless extension candidates. Maximal degree in co-relation 54432. Up to 2219 conditions per place. [2022-07-21 09:13:44,563 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1044 selfloop transitions, 906 changer transitions 14/2009 dead transitions. [2022-07-21 09:13:44,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2009 transitions, 46439 flow [2022-07-21 09:13:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:13:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:13:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1469 transitions. [2022-07-21 09:13:44,566 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464430894308943 [2022-07-21 09:13:44,566 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1469 transitions. [2022-07-21 09:13:44,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1469 transitions. [2022-07-21 09:13:44,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:44,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1469 transitions. [2022-07-21 09:13:44,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.208333333333336) internal successors, (1469), 24 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:44,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:44,571 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:44,571 INFO L186 Difference]: Start difference. First operand has 471 places, 1527 transitions, 32263 flow. Second operand 24 states and 1469 transitions. [2022-07-21 09:13:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2009 transitions, 46439 flow [2022-07-21 09:13:46,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 2009 transitions, 44451 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-07-21 09:13:46,099 INFO L242 Difference]: Finished difference. Result has 486 places, 1815 transitions, 41302 flow [2022-07-21 09:13:46,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30869, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41302, PETRI_PLACES=486, PETRI_TRANSITIONS=1815} [2022-07-21 09:13:46,101 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 414 predicate places. [2022-07-21 09:13:46,101 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1815 transitions, 41302 flow [2022-07-21 09:13:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:46,102 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:46,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:46,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:13:46,315 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash -876241051, now seen corresponding path program 12 times [2022-07-21 09:13:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606183144] [2022-07-21 09:13:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:46,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:46,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606183144] [2022-07-21 09:13:46,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606183144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44966712] [2022-07-21 09:13:46,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:13:46,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:46,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:46,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:46,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:13:46,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:13:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44966712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:46,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:46,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-21 09:13:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384446752] [2022-07-21 09:13:46,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:13:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:13:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:13:46,760 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:46,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1815 transitions, 41302 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:46,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:46,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:52,555 INFO L129 PetriNetUnfolder]: 3225/9342 cut-off events. [2022-07-21 09:13:52,555 INFO L130 PetriNetUnfolder]: For 269109/269109 co-relation queries the response was YES. [2022-07-21 09:13:52,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86722 conditions, 9342 events. 3225/9342 cut-off events. For 269109/269109 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95537 event pairs, 157 based on Foata normal form. 11/9304 useless extension candidates. Maximal degree in co-relation 86562. Up to 2674 conditions per place. [2022-07-21 09:13:52,708 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1602 selfloop transitions, 1237 changer transitions 24/2908 dead transitions. [2022-07-21 09:13:52,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2908 transitions, 72684 flow [2022-07-21 09:13:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:13:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:13:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3734 transitions. [2022-07-21 09:13:52,712 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465013994402239 [2022-07-21 09:13:52,712 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3734 transitions. [2022-07-21 09:13:52,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3734 transitions. [2022-07-21 09:13:52,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:52,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3734 transitions. [2022-07-21 09:13:52,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.21311475409836) internal successors, (3734), 61 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:52,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:52,723 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:52,723 INFO L186 Difference]: Start difference. First operand has 486 places, 1815 transitions, 41302 flow. Second operand 61 states and 3734 transitions. [2022-07-21 09:13:52,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2908 transitions, 72684 flow [2022-07-21 09:13:55,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2908 transitions, 72092 flow, removed 181 selfloop flow, removed 12 redundant places. [2022-07-21 09:13:55,799 INFO L242 Difference]: Finished difference. Result has 560 places, 2542 transitions, 63497 flow [2022-07-21 09:13:55,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=40961, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=63497, PETRI_PLACES=560, PETRI_TRANSITIONS=2542} [2022-07-21 09:13:55,802 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 488 predicate places. [2022-07-21 09:13:55,803 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2542 transitions, 63497 flow [2022-07-21 09:13:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,803 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:55,804 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:55,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:56,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:13:56,019 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 478208163, now seen corresponding path program 13 times [2022-07-21 09:13:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565402981] [2022-07-21 09:13:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565402981] [2022-07-21 09:13:56,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565402981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:56,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800184982] [2022-07-21 09:13:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:13:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:56,119 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:56,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:13:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:13:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800184982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:56,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:56,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-21 09:13:56,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989801448] [2022-07-21 09:13:56,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:56,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:13:56,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:13:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:13:56,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:13:56,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2542 transitions, 63497 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:56,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:13:56,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:04,972 INFO L129 PetriNetUnfolder]: 3972/11750 cut-off events. [2022-07-21 09:14:04,973 INFO L130 PetriNetUnfolder]: For 402447/402447 co-relation queries the response was YES. [2022-07-21 09:14:05,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115276 conditions, 11750 events. 3972/11750 cut-off events. For 402447/402447 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 126472 event pairs, 238 based on Foata normal form. 79/11757 useless extension candidates. Maximal degree in co-relation 114268. Up to 2084 conditions per place. [2022-07-21 09:14:05,255 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 928 selfloop transitions, 2346 changer transitions 12/3331 dead transitions. [2022-07-21 09:14:05,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 3331 transitions, 88961 flow [2022-07-21 09:14:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 09:14:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-21 09:14:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3629 transitions. [2022-07-21 09:14:05,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750103348491112 [2022-07-21 09:14:05,259 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3629 transitions. [2022-07-21 09:14:05,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3629 transitions. [2022-07-21 09:14:05,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:05,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3629 transitions. [2022-07-21 09:14:05,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.50847457627118) internal successors, (3629), 59 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,275 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,276 INFO L186 Difference]: Start difference. First operand has 560 places, 2542 transitions, 63497 flow. Second operand 59 states and 3629 transitions. [2022-07-21 09:14:05,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 3331 transitions, 88961 flow [2022-07-21 09:14:11,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 3331 transitions, 88246 flow, removed 315 selfloop flow, removed 15 redundant places. [2022-07-21 09:14:11,544 INFO L242 Difference]: Finished difference. Result has 625 places, 3108 transitions, 86417 flow [2022-07-21 09:14:11,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=62640, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=86417, PETRI_PLACES=625, PETRI_TRANSITIONS=3108} [2022-07-21 09:14:11,546 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 553 predicate places. [2022-07-21 09:14:11,546 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 3108 transitions, 86417 flow [2022-07-21 09:14:11,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:11,546 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:11,547 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:11,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:11,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:11,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1907780337, now seen corresponding path program 14 times [2022-07-21 09:14:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636993051] [2022-07-21 09:14:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:11,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636993051] [2022-07-21 09:14:11,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636993051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037317607] [2022-07-21 09:14:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:14:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:11,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:11,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:14:11,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:14:11,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:11,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:14:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:12,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:12,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037317607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:12,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:12,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-21 09:14:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244006271] [2022-07-21 09:14:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:12,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:14:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:14:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:14:12,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:14:12,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 3108 transitions, 86417 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:12,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:14:12,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:22,886 INFO L129 PetriNetUnfolder]: 3986/11919 cut-off events. [2022-07-21 09:14:22,886 INFO L130 PetriNetUnfolder]: For 457064/457075 co-relation queries the response was YES. [2022-07-21 09:14:23,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125431 conditions, 11919 events. 3986/11919 cut-off events. For 457064/457075 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 129436 event pairs, 227 based on Foata normal form. 14/11862 useless extension candidates. Maximal degree in co-relation 124803. Up to 2387 conditions per place. [2022-07-21 09:14:23,117 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1522 selfloop transitions, 1749 changer transitions 16/3332 dead transitions. [2022-07-21 09:14:23,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 3332 transitions, 98550 flow [2022-07-21 09:14:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:14:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-21 09:14:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2662 transitions. [2022-07-21 09:14:23,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7549631310266591 [2022-07-21 09:14:23,119 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2662 transitions. [2022-07-21 09:14:23,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2662 transitions. [2022-07-21 09:14:23,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:23,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2662 transitions. [2022-07-21 09:14:23,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.906976744186046) internal successors, (2662), 43 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:23,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:23,127 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:23,127 INFO L186 Difference]: Start difference. First operand has 625 places, 3108 transitions, 86417 flow. Second operand 43 states and 2662 transitions. [2022-07-21 09:14:23,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 3332 transitions, 98550 flow [2022-07-21 09:14:29,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 3332 transitions, 97346 flow, removed 233 selfloop flow, removed 24 redundant places. [2022-07-21 09:14:29,631 INFO L242 Difference]: Finished difference. Result has 651 places, 3141 transitions, 91046 flow [2022-07-21 09:14:29,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=85195, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=91046, PETRI_PLACES=651, PETRI_TRANSITIONS=3141} [2022-07-21 09:14:29,634 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 579 predicate places. [2022-07-21 09:14:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 3141 transitions, 91046 flow [2022-07-21 09:14:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:29,635 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:29,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:14:29,836 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1527497207, now seen corresponding path program 15 times [2022-07-21 09:14:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603971384] [2022-07-21 09:14:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:29,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603971384] [2022-07-21 09:14:29,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603971384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:29,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408377454] [2022-07-21 09:14:29,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:14:29,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:29,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:29,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:29,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:14:30,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:14:30,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:14:30,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408377454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:30,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-07-21 09:14:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972502031] [2022-07-21 09:14:30,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:14:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:14:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:14:30,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:14:30,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 3141 transitions, 91046 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:14:30,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:41,586 INFO L129 PetriNetUnfolder]: 4247/12550 cut-off events. [2022-07-21 09:14:41,587 INFO L130 PetriNetUnfolder]: For 529890/529890 co-relation queries the response was YES. [2022-07-21 09:14:41,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137140 conditions, 12550 events. 4247/12550 cut-off events. For 529890/529890 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 137100 event pairs, 93 based on Foata normal form. 120/12652 useless extension candidates. Maximal degree in co-relation 136696. Up to 4170 conditions per place. [2022-07-21 09:14:41,847 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1360 selfloop transitions, 2155 changer transitions 16/3576 dead transitions. [2022-07-21 09:14:41,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 3576 transitions, 109620 flow [2022-07-21 09:14:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:14:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-21 09:14:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-07-21 09:14:41,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-07-21 09:14:41,850 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-07-21 09:14:41,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-07-21 09:14:41,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:41,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-07-21 09:14:41,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,856 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,856 INFO L186 Difference]: Start difference. First operand has 651 places, 3141 transitions, 91046 flow. Second operand 40 states and 2495 transitions. [2022-07-21 09:14:41,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 3576 transitions, 109620 flow [2022-07-21 09:14:49,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 3576 transitions, 107572 flow, removed 211 selfloop flow, removed 25 redundant places. [2022-07-21 09:14:49,506 INFO L242 Difference]: Finished difference. Result has 693 places, 3353 transitions, 104218 flow [2022-07-21 09:14:49,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=89188, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=104218, PETRI_PLACES=693, PETRI_TRANSITIONS=3353} [2022-07-21 09:14:49,508 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 621 predicate places. [2022-07-21 09:14:49,508 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 3353 transitions, 104218 flow [2022-07-21 09:14:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:49,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:49,509 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:49,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:14:49,709 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -738199079, now seen corresponding path program 16 times [2022-07-21 09:14:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452326495] [2022-07-21 09:14:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452326495] [2022-07-21 09:14:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452326495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398989154] [2022-07-21 09:14:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:14:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:49,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:49,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:14:49,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:14:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:14:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:50,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398989154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:50,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:50,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-21 09:14:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781926439] [2022-07-21 09:14:50,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:14:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:14:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:14:50,127 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:14:50,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 3353 transitions, 104218 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:50,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:50,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:14:50,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:03,936 INFO L129 PetriNetUnfolder]: 4600/13629 cut-off events. [2022-07-21 09:15:03,936 INFO L130 PetriNetUnfolder]: For 752741/752741 co-relation queries the response was YES. [2022-07-21 09:15:04,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162148 conditions, 13629 events. 4600/13629 cut-off events. For 752741/752741 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 151723 event pairs, 317 based on Foata normal form. 4/13580 useless extension candidates. Maximal degree in co-relation 161702. Up to 5478 conditions per place. [2022-07-21 09:15:04,257 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2681 selfloop transitions, 975 changer transitions 9/3710 dead transitions. [2022-07-21 09:15:04,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 3710 transitions, 121868 flow [2022-07-21 09:15:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:15:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:15:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2022-07-21 09:15:04,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2022-07-21 09:15:04,259 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2022-07-21 09:15:04,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2022-07-21 09:15:04,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:04,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2022-07-21 09:15:04,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:04,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:04,264 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:04,264 INFO L186 Difference]: Start difference. First operand has 693 places, 3353 transitions, 104218 flow. Second operand 37 states and 2265 transitions. [2022-07-21 09:15:04,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 3710 transitions, 121868 flow [2022-07-21 09:15:14,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 3710 transitions, 120746 flow, removed 418 selfloop flow, removed 4 redundant places. [2022-07-21 09:15:15,135 INFO L242 Difference]: Finished difference. Result has 738 places, 3499 transitions, 111316 flow [2022-07-21 09:15:15,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=103029, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=111316, PETRI_PLACES=738, PETRI_TRANSITIONS=3499} [2022-07-21 09:15:15,139 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 666 predicate places. [2022-07-21 09:15:15,140 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 3499 transitions, 111316 flow [2022-07-21 09:15:15,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:15,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:15,140 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:15,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:15,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 822128127, now seen corresponding path program 17 times [2022-07-21 09:15:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741417912] [2022-07-21 09:15:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:15,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741417912] [2022-07-21 09:15:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741417912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660678749] [2022-07-21 09:15:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:15:15,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:15,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:15,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:15:15,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:15:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:15,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:15:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:15,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:15,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660678749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:15,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:15,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-21 09:15:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244799991] [2022-07-21 09:15:15,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:15:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:15:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:15:15,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:15:15,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 3499 transitions, 111316 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:15,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:15,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:15:15,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:36,964 INFO L129 PetriNetUnfolder]: 6530/19417 cut-off events. [2022-07-21 09:15:36,964 INFO L130 PetriNetUnfolder]: For 1144568/1144568 co-relation queries the response was YES. [2022-07-21 09:15:37,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234708 conditions, 19417 events. 6530/19417 cut-off events. For 1144568/1144568 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 231725 event pairs, 235 based on Foata normal form. 7/19390 useless extension candidates. Maximal degree in co-relation 234098. Up to 3683 conditions per place. [2022-07-21 09:15:37,649 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1469 selfloop transitions, 3802 changer transitions 10/5326 dead transitions. [2022-07-21 09:15:37,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 5326 transitions, 181444 flow [2022-07-21 09:15:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:15:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:15:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3351 transitions. [2022-07-21 09:15:37,653 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7430155210643016 [2022-07-21 09:15:37,653 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3351 transitions. [2022-07-21 09:15:37,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3351 transitions. [2022-07-21 09:15:37,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:37,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3351 transitions. [2022-07-21 09:15:37,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 60.92727272727273) internal successors, (3351), 55 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,662 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,662 INFO L186 Difference]: Start difference. First operand has 738 places, 3499 transitions, 111316 flow. Second operand 55 states and 3351 transitions. [2022-07-21 09:15:37,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 5326 transitions, 181444 flow [2022-07-21 09:15:58,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 5326 transitions, 180854 flow, removed 219 selfloop flow, removed 12 redundant places. [2022-07-21 09:15:58,869 INFO L242 Difference]: Finished difference. Result has 797 places, 4966 transitions, 177448 flow [2022-07-21 09:15:58,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=110844, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=177448, PETRI_PLACES=797, PETRI_TRANSITIONS=4966} [2022-07-21 09:15:58,872 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 725 predicate places. [2022-07-21 09:15:58,872 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 4966 transitions, 177448 flow [2022-07-21 09:15:58,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:58,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:58,873 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:58,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:59,075 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1155759277, now seen corresponding path program 18 times [2022-07-21 09:15:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:59,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987363512] [2022-07-21 09:15:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:59,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987363512] [2022-07-21 09:15:59,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987363512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882543767] [2022-07-21 09:15:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:15:59,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:59,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:59,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:15:59,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:15:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:15:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:59,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:15:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882543767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:59,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-21 09:15:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364850698] [2022-07-21 09:15:59,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:15:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:15:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:15:59,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:15:59,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 4966 transitions, 177448 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:59,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:59,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:15:59,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:30,764 INFO L129 PetriNetUnfolder]: 6800/20186 cut-off events. [2022-07-21 09:16:30,765 INFO L130 PetriNetUnfolder]: For 1379071/1379071 co-relation queries the response was YES. [2022-07-21 09:16:31,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262250 conditions, 20186 events. 6800/20186 cut-off events. For 1379071/1379071 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 242282 event pairs, 403 based on Foata normal form. 43/20164 useless extension candidates. Maximal degree in co-relation 261395. Up to 7887 conditions per place. [2022-07-21 09:16:31,315 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1932 selfloop transitions, 3330 changer transitions 7/5314 dead transitions. [2022-07-21 09:16:31,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 5314 transitions, 198766 flow [2022-07-21 09:16:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:16:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:16:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2100 transitions. [2022-07-21 09:16:31,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7532281205164992 [2022-07-21 09:16:31,317 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2100 transitions. [2022-07-21 09:16:31,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2100 transitions. [2022-07-21 09:16:31,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:31,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2100 transitions. [2022-07-21 09:16:31,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.76470588235294) internal successors, (2100), 34 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,321 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,321 INFO L186 Difference]: Start difference. First operand has 797 places, 4966 transitions, 177448 flow. Second operand 34 states and 2100 transitions. [2022-07-21 09:16:31,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 5314 transitions, 198766 flow [2022-07-21 09:16:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 5314 transitions, 197346 flow, removed 480 selfloop flow, removed 21 redundant places. [2022-07-21 09:16:58,892 INFO L242 Difference]: Finished difference. Result has 819 places, 5171 transitions, 196248 flow [2022-07-21 09:16:58,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=176087, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=196248, PETRI_PLACES=819, PETRI_TRANSITIONS=5171} [2022-07-21 09:16:58,896 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 747 predicate places. [2022-07-21 09:16:58,896 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 5171 transitions, 196248 flow [2022-07-21 09:16:58,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:58,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:58,897 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:58,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:59,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:59,097 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:59,098 INFO L85 PathProgramCache]: Analyzing trace with hash -270707467, now seen corresponding path program 19 times [2022-07-21 09:16:59,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:59,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362251650] [2022-07-21 09:16:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362251650] [2022-07-21 09:16:59,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362251650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909168923] [2022-07-21 09:16:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:16:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:59,184 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:59,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:16:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:16:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:59,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:59,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909168923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:59,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:59,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-21 09:16:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100460254] [2022-07-21 09:16:59,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:59,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:16:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:16:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:16:59,527 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-21 09:16:59,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 5171 transitions, 196248 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:59,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:59,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-21 09:16:59,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand