./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-counter-determinism.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 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:10:42,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:10:42,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:10:42,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:10:42,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:10:42,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:10:42,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:10:42,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:10:42,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:10:42,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:10:42,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:10:42,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:10:42,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:10:42,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:10:42,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:10:42,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:10:42,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:10:42,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:10:42,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:10:42,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:10:42,754 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:10:42,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:10:42,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:10:42,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:10:42,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:10:42,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:10:42,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:10:42,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:10:42,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:10:42,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:10:42,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:10:42,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:10:42,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:10:42,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:10:42,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:10:42,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:10:42,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:10:42,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:10:42,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:10:42,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:10:42,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:10:42,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:10:42,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:10:42,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:10:42,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:10:42,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:10:42,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:10:42,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:10:42,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:10:42,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:10:42,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:10:42,803 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:10:42,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:10:42,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:10:42,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:10:42,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:10:42,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:10:42,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:10:42,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:10:42,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:10:42,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:10:42,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:10:42,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:42,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:10:42,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:10:42,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:10:42,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:10:42,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:10:42,808 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:10:42,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:10:42,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:10:42,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 [2022-07-13 22:10:43,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:10:43,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:10:43,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:10:43,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:10:43,027 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:10:43,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-07-13 22:10:43,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02876dab5/0b65cc312b2547cf88c6577a7f3eaa70/FLAGed4b0c6c5 [2022-07-13 22:10:43,385 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:10:43,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-07-13 22:10:43,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02876dab5/0b65cc312b2547cf88c6577a7f3eaa70/FLAGed4b0c6c5 [2022-07-13 22:10:43,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02876dab5/0b65cc312b2547cf88c6577a7f3eaa70 [2022-07-13 22:10:43,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:10:43,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:10:43,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:43,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:10:43,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:10:43,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:43,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133bd2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43, skipping insertion in model container [2022-07-13 22:10:43,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:43,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:10:43,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:10:43,962 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-counter-determinism.wvr.c[2476,2489] [2022-07-13 22:10:43,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:43,972 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:10:43,987 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-counter-determinism.wvr.c[2476,2489] [2022-07-13 22:10:43,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:43,997 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:10:43,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43 WrapperNode [2022-07-13 22:10:43,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:43,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:43,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:10:43,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:10:44,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,042 INFO L137 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 116 [2022-07-13 22:10:44,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:44,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:10:44,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:10:44,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:10:44,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:10:44,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:10:44,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:10:44,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:10:44,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (1/1) ... [2022-07-13 22:10:44,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:44,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:44,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:10:44,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:10:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:10:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:10:44,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:10:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:10:44,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:10:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:10:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:10:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:10:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:10:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:10:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:10:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:10:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:10:44,152 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:10:44,208 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:10:44,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:10:44,418 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:10:44,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:10:44,455 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 22:10:44,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:44 BoogieIcfgContainer [2022-07-13 22:10:44,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:10:44,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:10:44,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:10:44,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:10:44,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:10:43" (1/3) ... [2022-07-13 22:10:44,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d590794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:44, skipping insertion in model container [2022-07-13 22:10:44,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:43" (2/3) ... [2022-07-13 22:10:44,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d590794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:44, skipping insertion in model container [2022-07-13 22:10:44,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:44" (3/3) ... [2022-07-13 22:10:44,476 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2022-07-13 22:10:44,480 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:10:44,485 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:10:44,486 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:10:44,486 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:10:44,524 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:10:44,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 124 transitions, 280 flow [2022-07-13 22:10:44,620 INFO L129 PetriNetUnfolder]: 9/120 cut-off events. [2022-07-13 22:10:44,620 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:10:44,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 9/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-07-13 22:10:44,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 124 transitions, 280 flow [2022-07-13 22:10:44,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 107 transitions, 238 flow [2022-07-13 22:10:44,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:10:44,649 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@b06defd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b186fb6 [2022-07-13 22:10:44,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 22:10:44,681 INFO L129 PetriNetUnfolder]: 9/106 cut-off events. [2022-07-13 22:10:44,681 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:10:44,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:44,682 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:44,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -60786852, now seen corresponding path program 1 times [2022-07-13 22:10:44,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886470397] [2022-07-13 22:10:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:44,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:44,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886470397] [2022-07-13 22:10:44,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886470397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:44,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:44,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:10:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181322170] [2022-07-13 22:10:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:44,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:10:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:10:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:10:44,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 124 [2022-07-13 22:10:44,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 238 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:44,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:44,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 124 [2022-07-13 22:10:44,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:45,032 INFO L129 PetriNetUnfolder]: 121/483 cut-off events. [2022-07-13 22:10:45,033 INFO L130 PetriNetUnfolder]: For 106/107 co-relation queries the response was YES. [2022-07-13 22:10:45,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 483 events. 121/483 cut-off events. For 106/107 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2230 event pairs, 51 based on Foata normal form. 118/532 useless extension candidates. Maximal degree in co-relation 568. Up to 163 conditions per place. [2022-07-13 22:10:45,069 INFO L132 encePairwiseOnDemand]: 119/124 looper letters, 12 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2022-07-13 22:10:45,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 252 flow [2022-07-13 22:10:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:10:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:10:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 229 transitions. [2022-07-13 22:10:45,097 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9233870967741935 [2022-07-13 22:10:45,109 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 229 transitions. [2022-07-13 22:10:45,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 229 transitions. [2022-07-13 22:10:45,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:45,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 229 transitions. [2022-07-13 22:10:45,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,118 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,119 INFO L186 Difference]: Start difference. First operand has 111 places, 107 transitions, 238 flow. Second operand 2 states and 229 transitions. [2022-07-13 22:10:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 252 flow [2022-07-13 22:10:45,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 22:10:45,124 INFO L242 Difference]: Finished difference. Result has 104 places, 101 transitions, 210 flow [2022-07-13 22:10:45,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2022-07-13 22:10:45,128 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-07-13 22:10:45,129 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 210 flow [2022-07-13 22:10:45,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:45,143 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:45,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:10:45,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1089609413, now seen corresponding path program 1 times [2022-07-13 22:10:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287618809] [2022-07-13 22:10:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287618809] [2022-07-13 22:10:45,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287618809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:45,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:45,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500992987] [2022-07-13 22:10:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:45,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 124 [2022-07-13 22:10:45,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:45,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 124 [2022-07-13 22:10:45,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:45,421 INFO L129 PetriNetUnfolder]: 107/477 cut-off events. [2022-07-13 22:10:45,422 INFO L130 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-07-13 22:10:45,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 477 events. 107/477 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2117 event pairs, 26 based on Foata normal form. 15/434 useless extension candidates. Maximal degree in co-relation 656. Up to 124 conditions per place. [2022-07-13 22:10:45,426 INFO L132 encePairwiseOnDemand]: 115/124 looper letters, 32 selfloop transitions, 5 changer transitions 5/125 dead transitions. [2022-07-13 22:10:45,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 125 transitions, 354 flow [2022-07-13 22:10:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:10:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:10:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 640 transitions. [2022-07-13 22:10:45,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8602150537634409 [2022-07-13 22:10:45,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 640 transitions. [2022-07-13 22:10:45,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 640 transitions. [2022-07-13 22:10:45,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:45,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 640 transitions. [2022-07-13 22:10:45,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.66666666666667) internal successors, (640), 6 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,439 INFO L186 Difference]: Start difference. First operand has 104 places, 101 transitions, 210 flow. Second operand 6 states and 640 transitions. [2022-07-13 22:10:45,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 125 transitions, 354 flow [2022-07-13 22:10:45,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:10:45,442 INFO L242 Difference]: Finished difference. Result has 112 places, 104 transitions, 249 flow [2022-07-13 22:10:45,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-07-13 22:10:45,443 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2022-07-13 22:10:45,443 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 249 flow [2022-07-13 22:10:45,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:45,444 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:45,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:10:45,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash -204747371, now seen corresponding path program 1 times [2022-07-13 22:10:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:45,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363397902] [2022-07-13 22:10:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:45,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363397902] [2022-07-13 22:10:45,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363397902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:45,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:45,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485814462] [2022-07-13 22:10:45,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:45,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:45,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:45,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:45,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:45,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:45,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:45,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:46,469 INFO L129 PetriNetUnfolder]: 6700/10882 cut-off events. [2022-07-13 22:10:46,469 INFO L130 PetriNetUnfolder]: For 1841/1841 co-relation queries the response was YES. [2022-07-13 22:10:46,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 10882 events. 6700/10882 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 78149 event pairs, 2593 based on Foata normal form. 0/8184 useless extension candidates. Maximal degree in co-relation 22181. Up to 4996 conditions per place. [2022-07-13 22:10:46,547 INFO L132 encePairwiseOnDemand]: 117/124 looper letters, 65 selfloop transitions, 5 changer transitions 11/154 dead transitions. [2022-07-13 22:10:46,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 551 flow [2022-07-13 22:10:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:10:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:10:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2022-07-13 22:10:46,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-07-13 22:10:46,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 616 transitions. [2022-07-13 22:10:46,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 616 transitions. [2022-07-13 22:10:46,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:46,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 616 transitions. [2022-07-13 22:10:46,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,554 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,554 INFO L186 Difference]: Start difference. First operand has 112 places, 104 transitions, 249 flow. Second operand 6 states and 616 transitions. [2022-07-13 22:10:46,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 551 flow [2022-07-13 22:10:46,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 154 transitions, 547 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:10:46,560 INFO L242 Difference]: Finished difference. Result has 116 places, 106 transitions, 271 flow [2022-07-13 22:10:46,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2022-07-13 22:10:46,561 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 5 predicate places. [2022-07-13 22:10:46,561 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 271 flow [2022-07-13 22:10:46,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:46,562 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:10:46,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1323837765, now seen corresponding path program 2 times [2022-07-13 22:10:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757222572] [2022-07-13 22:10:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:46,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:46,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757222572] [2022-07-13 22:10:46,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757222572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:46,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612210261] [2022-07-13 22:10:46,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:10:46,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:46,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:10:46,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:10:46,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:10:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:46,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612210261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:46,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:46,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-13 22:10:46,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808590933] [2022-07-13 22:10:46,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:10:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:10:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:10:46,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:46,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 271 flow. Second operand has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:46,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:46,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:48,276 INFO L129 PetriNetUnfolder]: 11071/18071 cut-off events. [2022-07-13 22:10:48,277 INFO L130 PetriNetUnfolder]: For 5813/6596 co-relation queries the response was YES. [2022-07-13 22:10:48,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40047 conditions, 18071 events. 11071/18071 cut-off events. For 5813/6596 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 143744 event pairs, 1277 based on Foata normal form. 780/16577 useless extension candidates. Maximal degree in co-relation 40037. Up to 2464 conditions per place. [2022-07-13 22:10:48,404 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 185 selfloop transitions, 24 changer transitions 3/286 dead transitions. [2022-07-13 22:10:48,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 286 transitions, 1280 flow [2022-07-13 22:10:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:10:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:10:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1452 transitions. [2022-07-13 22:10:48,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.836405529953917 [2022-07-13 22:10:48,408 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1452 transitions. [2022-07-13 22:10:48,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1452 transitions. [2022-07-13 22:10:48,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:48,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1452 transitions. [2022-07-13 22:10:48,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 103.71428571428571) internal successors, (1452), 14 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:48,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:48,414 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:48,414 INFO L186 Difference]: Start difference. First operand has 116 places, 106 transitions, 271 flow. Second operand 14 states and 1452 transitions. [2022-07-13 22:10:48,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 286 transitions, 1280 flow [2022-07-13 22:10:48,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 286 transitions, 1264 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-13 22:10:48,427 INFO L242 Difference]: Finished difference. Result has 132 places, 132 transitions, 421 flow [2022-07-13 22:10:48,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=421, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2022-07-13 22:10:48,428 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 21 predicate places. [2022-07-13 22:10:48,428 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 421 flow [2022-07-13 22:10:48,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:48,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:48,428 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:48,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:48,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:48,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -476073083, now seen corresponding path program 1 times [2022-07-13 22:10:48,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:48,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954283167] [2022-07-13 22:10:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954283167] [2022-07-13 22:10:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954283167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:48,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:48,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045315876] [2022-07-13 22:10:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:48,720 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:48,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:48,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:48,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:48,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:51,074 INFO L129 PetriNetUnfolder]: 20247/32769 cut-off events. [2022-07-13 22:10:51,075 INFO L130 PetriNetUnfolder]: For 36066/39241 co-relation queries the response was YES. [2022-07-13 22:10:51,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87365 conditions, 32769 events. 20247/32769 cut-off events. For 36066/39241 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 282186 event pairs, 9264 based on Foata normal form. 1816/32677 useless extension candidates. Maximal degree in co-relation 87349. Up to 15847 conditions per place. [2022-07-13 22:10:51,371 INFO L132 encePairwiseOnDemand]: 117/124 looper letters, 132 selfloop transitions, 6 changer transitions 5/229 dead transitions. [2022-07-13 22:10:51,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 229 transitions, 1137 flow [2022-07-13 22:10:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:10:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:10:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2022-07-13 22:10:51,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-07-13 22:10:51,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 616 transitions. [2022-07-13 22:10:51,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 616 transitions. [2022-07-13 22:10:51,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:51,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 616 transitions. [2022-07-13 22:10:51,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:51,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:51,377 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:51,377 INFO L186 Difference]: Start difference. First operand has 132 places, 132 transitions, 421 flow. Second operand 6 states and 616 transitions. [2022-07-13 22:10:51,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 229 transitions, 1137 flow [2022-07-13 22:10:51,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 1137 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:10:51,403 INFO L242 Difference]: Finished difference. Result has 140 places, 134 transitions, 451 flow [2022-07-13 22:10:51,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=140, PETRI_TRANSITIONS=134} [2022-07-13 22:10:51,406 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 29 predicate places. [2022-07-13 22:10:51,406 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 451 flow [2022-07-13 22:10:51,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:51,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:51,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:51,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:10:51,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash -262993417, now seen corresponding path program 2 times [2022-07-13 22:10:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:51,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327416639] [2022-07-13 22:10:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327416639] [2022-07-13 22:10:51,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327416639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:51,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:51,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686684668] [2022-07-13 22:10:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:51,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:51,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 134 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:51,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:51,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:51,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:54,325 INFO L129 PetriNetUnfolder]: 20357/37477 cut-off events. [2022-07-13 22:10:54,326 INFO L130 PetriNetUnfolder]: For 44264/47262 co-relation queries the response was YES. [2022-07-13 22:10:54,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100098 conditions, 37477 events. 20357/37477 cut-off events. For 44264/47262 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 362066 event pairs, 14078 based on Foata normal form. 2706/39479 useless extension candidates. Maximal degree in co-relation 100078. Up to 18541 conditions per place. [2022-07-13 22:10:54,650 INFO L132 encePairwiseOnDemand]: 117/124 looper letters, 81 selfloop transitions, 8 changer transitions 15/187 dead transitions. [2022-07-13 22:10:54,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 890 flow [2022-07-13 22:10:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:10:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:10:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 617 transitions. [2022-07-13 22:10:54,652 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8293010752688172 [2022-07-13 22:10:54,652 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 617 transitions. [2022-07-13 22:10:54,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 617 transitions. [2022-07-13 22:10:54,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:54,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 617 transitions. [2022-07-13 22:10:54,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,655 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,655 INFO L186 Difference]: Start difference. First operand has 140 places, 134 transitions, 451 flow. Second operand 6 states and 617 transitions. [2022-07-13 22:10:54,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 890 flow [2022-07-13 22:10:54,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 884 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:10:54,740 INFO L242 Difference]: Finished difference. Result has 145 places, 134 transitions, 468 flow [2022-07-13 22:10:54,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=145, PETRI_TRANSITIONS=134} [2022-07-13 22:10:54,741 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 34 predicate places. [2022-07-13 22:10:54,741 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 134 transitions, 468 flow [2022-07-13 22:10:54,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:54,742 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:54,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:10:54,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:54,743 INFO L85 PathProgramCache]: Analyzing trace with hash 867506165, now seen corresponding path program 3 times [2022-07-13 22:10:54,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:54,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24313208] [2022-07-13 22:10:54,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:54,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:54,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24313208] [2022-07-13 22:10:54,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24313208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:54,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:54,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:54,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527358424] [2022-07-13 22:10:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:54,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:54,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:54,777 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:54,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 134 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:54,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:54,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:58,298 INFO L129 PetriNetUnfolder]: 25616/44154 cut-off events. [2022-07-13 22:10:58,307 INFO L130 PetriNetUnfolder]: For 51022/52568 co-relation queries the response was YES. [2022-07-13 22:10:58,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122380 conditions, 44154 events. 25616/44154 cut-off events. For 51022/52568 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 417356 event pairs, 10085 based on Foata normal form. 1611/45048 useless extension candidates. Maximal degree in co-relation 122358. Up to 17231 conditions per place. [2022-07-13 22:10:58,915 INFO L132 encePairwiseOnDemand]: 117/124 looper letters, 116 selfloop transitions, 16 changer transitions 1/211 dead transitions. [2022-07-13 22:10:58,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 211 transitions, 1092 flow [2022-07-13 22:10:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:10:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:10:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 619 transitions. [2022-07-13 22:10:58,917 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.831989247311828 [2022-07-13 22:10:58,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 619 transitions. [2022-07-13 22:10:58,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 619 transitions. [2022-07-13 22:10:58,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:58,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 619 transitions. [2022-07-13 22:10:58,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:58,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:58,919 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:58,920 INFO L186 Difference]: Start difference. First operand has 145 places, 134 transitions, 468 flow. Second operand 6 states and 619 transitions. [2022-07-13 22:10:58,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 211 transitions, 1092 flow [2022-07-13 22:10:59,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 211 transitions, 1077 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-07-13 22:10:59,272 INFO L242 Difference]: Finished difference. Result has 149 places, 140 transitions, 560 flow [2022-07-13 22:10:59,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=149, PETRI_TRANSITIONS=140} [2022-07-13 22:10:59,273 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 38 predicate places. [2022-07-13 22:10:59,273 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 140 transitions, 560 flow [2022-07-13 22:10:59,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:59,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:59,274 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:59,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:10:59,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1370995851, now seen corresponding path program 4 times [2022-07-13 22:10:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:59,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666750636] [2022-07-13 22:10:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:59,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666750636] [2022-07-13 22:10:59,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666750636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:59,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:59,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:59,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613318648] [2022-07-13 22:10:59,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:59,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:59,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:59,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:10:59,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 140 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:59,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:59,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:10:59,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:03,958 INFO L129 PetriNetUnfolder]: 32078/59641 cut-off events. [2022-07-13 22:11:03,959 INFO L130 PetriNetUnfolder]: For 107458/112647 co-relation queries the response was YES. [2022-07-13 22:11:04,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167008 conditions, 59641 events. 32078/59641 cut-off events. For 107458/112647 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 615743 event pairs, 19774 based on Foata normal form. 4757/63289 useless extension candidates. Maximal degree in co-relation 166984. Up to 25939 conditions per place. [2022-07-13 22:11:04,573 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 132 selfloop transitions, 19 changer transitions 4/241 dead transitions. [2022-07-13 22:11:04,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 241 transitions, 1397 flow [2022-07-13 22:11:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:11:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:11:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 646 transitions. [2022-07-13 22:11:04,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8682795698924731 [2022-07-13 22:11:04,575 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 646 transitions. [2022-07-13 22:11:04,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 646 transitions. [2022-07-13 22:11:04,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:04,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 646 transitions. [2022-07-13 22:11:04,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.66666666666667) internal successors, (646), 6 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:04,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:04,579 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:04,579 INFO L186 Difference]: Start difference. First operand has 149 places, 140 transitions, 560 flow. Second operand 6 states and 646 transitions. [2022-07-13 22:11:04,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 241 transitions, 1397 flow [2022-07-13 22:11:04,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 241 transitions, 1362 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-07-13 22:11:04,772 INFO L242 Difference]: Finished difference. Result has 155 places, 154 transitions, 735 flow [2022-07-13 22:11:04,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=735, PETRI_PLACES=155, PETRI_TRANSITIONS=154} [2022-07-13 22:11:04,773 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 44 predicate places. [2022-07-13 22:11:04,773 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 154 transitions, 735 flow [2022-07-13 22:11:04,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:04,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:04,774 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:11:04,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:11:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash -233866269, now seen corresponding path program 5 times [2022-07-13 22:11:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137036264] [2022-07-13 22:11:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:04,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137036264] [2022-07-13 22:11:04,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137036264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:04,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328332182] [2022-07-13 22:11:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:11:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:04,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:04,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:11:04,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:11:04,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:11:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328332182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:04,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 22:11:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272810857] [2022-07-13 22:11:04,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:11:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:11:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:11:04,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:11:04,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 154 transitions, 735 flow. Second operand has 11 states, 11 states have (on average 93.54545454545455) internal successors, (1029), 11 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:04,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:04,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:11:04,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:10,054 INFO L129 PetriNetUnfolder]: 31293/54958 cut-off events. [2022-07-13 22:11:10,054 INFO L130 PetriNetUnfolder]: For 120595/125996 co-relation queries the response was YES. [2022-07-13 22:11:10,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169286 conditions, 54958 events. 31293/54958 cut-off events. For 120595/125996 co-relation queries the response was YES. Maximal size of possible extension queue 2625. Compared 539447 event pairs, 9785 based on Foata normal form. 5703/59722 useless extension candidates. Maximal degree in co-relation 169259. Up to 14499 conditions per place. [2022-07-13 22:11:10,715 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 160 selfloop transitions, 32 changer transitions 7/285 dead transitions. [2022-07-13 22:11:10,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 285 transitions, 1891 flow [2022-07-13 22:11:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:11:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:11:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 945 transitions. [2022-07-13 22:11:10,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8467741935483871 [2022-07-13 22:11:10,717 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 945 transitions. [2022-07-13 22:11:10,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 945 transitions. [2022-07-13 22:11:10,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:10,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 945 transitions. [2022-07-13 22:11:10,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.0) internal successors, (945), 9 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:10,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:10,721 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:10,721 INFO L186 Difference]: Start difference. First operand has 155 places, 154 transitions, 735 flow. Second operand 9 states and 945 transitions. [2022-07-13 22:11:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 285 transitions, 1891 flow [2022-07-13 22:11:11,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 285 transitions, 1880 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:11:11,179 INFO L242 Difference]: Finished difference. Result has 167 places, 166 transitions, 976 flow [2022-07-13 22:11:11,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=976, PETRI_PLACES=167, PETRI_TRANSITIONS=166} [2022-07-13 22:11:11,181 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 56 predicate places. [2022-07-13 22:11:11,181 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 166 transitions, 976 flow [2022-07-13 22:11:11,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 93.54545454545455) internal successors, (1029), 11 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:11,181 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:11,182 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:11,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 22:11:11,398 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,SelfDestructingSolverStorable8 [2022-07-13 22:11:11,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:11:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1360228875, now seen corresponding path program 6 times [2022-07-13 22:11:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095505580] [2022-07-13 22:11:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:11,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095505580] [2022-07-13 22:11:11,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095505580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:11,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:11,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:11:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408964253] [2022-07-13 22:11:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:11:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:11:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:11:11,439 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:11:11,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 166 transitions, 976 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:11,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:11,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:11:11,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:17,678 INFO L129 PetriNetUnfolder]: 37262/69854 cut-off events. [2022-07-13 22:11:17,678 INFO L130 PetriNetUnfolder]: For 190063/192230 co-relation queries the response was YES. [2022-07-13 22:11:18,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218454 conditions, 69854 events. 37262/69854 cut-off events. For 190063/192230 co-relation queries the response was YES. Maximal size of possible extension queue 3261. Compared 749880 event pairs, 14885 based on Foata normal form. 2449/71459 useless extension candidates. Maximal degree in co-relation 218421. Up to 21279 conditions per place. [2022-07-13 22:11:18,752 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 206 selfloop transitions, 46 changer transitions 6/343 dead transitions. [2022-07-13 22:11:18,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 343 transitions, 2648 flow [2022-07-13 22:11:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:11:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:11:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 644 transitions. [2022-07-13 22:11:18,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655913978494624 [2022-07-13 22:11:18,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 644 transitions. [2022-07-13 22:11:18,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 644 transitions. [2022-07-13 22:11:18,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:18,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 644 transitions. [2022-07-13 22:11:18,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:18,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:18,757 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:18,757 INFO L186 Difference]: Start difference. First operand has 167 places, 166 transitions, 976 flow. Second operand 6 states and 644 transitions. [2022-07-13 22:11:18,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 343 transitions, 2648 flow [2022-07-13 22:11:19,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 343 transitions, 2502 flow, removed 18 selfloop flow, removed 5 redundant places. [2022-07-13 22:11:19,379 INFO L242 Difference]: Finished difference. Result has 171 places, 197 transitions, 1385 flow [2022-07-13 22:11:19,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1385, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2022-07-13 22:11:19,380 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 60 predicate places. [2022-07-13 22:11:19,380 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 1385 flow [2022-07-13 22:11:19,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:19,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:19,381 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:11:19,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:11:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285945, now seen corresponding path program 7 times [2022-07-13 22:11:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:19,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454112516] [2022-07-13 22:11:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454112516] [2022-07-13 22:11:19,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454112516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581296396] [2022-07-13 22:11:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:11:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:19,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:19,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:11:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:11:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:19,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581296396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:19,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 22:11:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333250889] [2022-07-13 22:11:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:11:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:11:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:11:19,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-07-13 22:11:19,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 1385 flow. Second operand has 11 states, 11 states have (on average 93.36363636363636) internal successors, (1027), 11 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:19,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:19,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-07-13 22:11:19,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand