./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp3x3.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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:55:40,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:55:40,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:55:40,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:55:40,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:55:40,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:55:40,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:55:40,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:55:40,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:55:40,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:55:40,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:55:40,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:55:40,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:55:40,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:55:40,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:55:40,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:55:40,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:55:40,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:55:40,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:55:40,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:55:40,454 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:55:40,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:55:40,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:55:40,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:55:40,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:55:40,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:55:40,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:55:40,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:55:40,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:55:40,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:55:40,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:55:40,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:55:40,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:55:40,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:55:40,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:55:40,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:55:40,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:55:40,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:55:40,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:55:40,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:55:40,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:55:40,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:55:40,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:55:40,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:55:40,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:55:40,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:55:40,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:55:40,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:55:40,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:55:40,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:55:40,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:55:40,502 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:55:40,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:55:40,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:55:40,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:55:40,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:55:40,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:55:40,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:55:40,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:55:40,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:55:40,511 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:55:40,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:55:40,511 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:55:40,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:55:40,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:55:40,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:55:40,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:55:40,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:55:40,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:55:40,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:55:40,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2022-07-21 08:55:40,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:55:40,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:55:40,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:55:40,789 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:55:40,789 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:55:40,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-21 08:55:40,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7dea1c4f/d285a1cf711b4f4586d4dea6e563ce45/FLAG02627bfc2 [2022-07-21 08:55:41,184 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:55:41,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-21 08:55:41,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7dea1c4f/d285a1cf711b4f4586d4dea6e563ce45/FLAG02627bfc2 [2022-07-21 08:55:41,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7dea1c4f/d285a1cf711b4f4586d4dea6e563ce45 [2022-07-21 08:55:41,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:55:41,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:55:41,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:55:41,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:55:41,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:55:41,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3af640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41, skipping insertion in model container [2022-07-21 08:55:41,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:55:41,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:55:41,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-21 08:55:41,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:55:41,718 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:55:41,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-21 08:55:41,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:55:41,753 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:55:41,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41 WrapperNode [2022-07-21 08:55:41,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:55:41,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:55:41,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:55:41,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:55:41,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,787 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-07-21 08:55:41,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:55:41,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:55:41,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:55:41,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:55:41,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:55:41,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:55:41,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:55:41,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:55:41,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (1/1) ... [2022-07-21 08:55:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:55:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:41,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:55:41,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:55:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:55:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 08:55:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 08:55:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 08:55:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 08:55:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 08:55:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 08:55:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-21 08:55:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-21 08:55:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:55:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-21 08:55:41,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-21 08:55:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-07-21 08:55:41,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-07-21 08:55:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:55:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:55:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:55:41,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:55:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:55:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:55:41,887 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:55:41,990 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:55:42,004 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:55:42,217 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:55:42,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:55:42,223 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 08:55:42,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:55:42 BoogieIcfgContainer [2022-07-21 08:55:42,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:55:42,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:55:42,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:55:42,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:55:42,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:55:41" (1/3) ... [2022-07-21 08:55:42,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d24088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:55:42, skipping insertion in model container [2022-07-21 08:55:42,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:41" (2/3) ... [2022-07-21 08:55:42,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d24088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:55:42, skipping insertion in model container [2022-07-21 08:55:42,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:55:42" (3/3) ... [2022-07-21 08:55:42,230 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2022-07-21 08:55:42,233 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:55:42,239 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:55:42,239 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:55:42,239 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:55:42,316 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 08:55:42,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-07-21 08:55:42,420 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-21 08:55:42,420 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:55:42,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-07-21 08:55:42,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-07-21 08:55:42,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-07-21 08:55:42,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:55:42,445 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@799757d8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3891a8cc [2022-07-21 08:55:42,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:55:42,489 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2022-07-21 08:55:42,490 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:55:42,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:42,491 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:42,491 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 4 more)] === [2022-07-21 08:55:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1805930400, now seen corresponding path program 1 times [2022-07-21 08:55:42,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:42,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169717296] [2022-07-21 08:55:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:42,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169717296] [2022-07-21 08:55:42,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169717296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:42,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:42,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:55:42,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375042281] [2022-07-21 08:55:42,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:42,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:55:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:55:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:55:42,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2022-07-21 08:55:42,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:42,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:42,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2022-07-21 08:55:42,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:42,904 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2022-07-21 08:55:42,904 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-21 08:55:42,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2022-07-21 08:55:42,910 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2022-07-21 08:55:42,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2022-07-21 08:55:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:55:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:55:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2022-07-21 08:55:42,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2022-07-21 08:55:42,931 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2022-07-21 08:55:42,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2022-07-21 08:55:42,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:42,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2022-07-21 08:55:42,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:42,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:42,950 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:42,951 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2022-07-21 08:55:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2022-07-21 08:55:42,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-07-21 08:55:42,959 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2022-07-21 08:55:42,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2022-07-21 08:55:42,964 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2022-07-21 08:55:42,964 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2022-07-21 08:55:42,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:42,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:42,966 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:42,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:55:42,966 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 4 more)] === [2022-07-21 08:55:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1921476920, now seen corresponding path program 1 times [2022-07-21 08:55:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:42,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113020576] [2022-07-21 08:55:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113020576] [2022-07-21 08:55:43,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113020576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:43,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:43,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:55:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102404523] [2022-07-21 08:55:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:43,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:55:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:55:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:55:43,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2022-07-21 08:55:43,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:43,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:43,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2022-07-21 08:55:43,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:45,587 INFO L129 PetriNetUnfolder]: 13855/19787 cut-off events. [2022-07-21 08:55:45,587 INFO L130 PetriNetUnfolder]: For 728/1092 co-relation queries the response was YES. [2022-07-21 08:55:45,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37307 conditions, 19787 events. 13855/19787 cut-off events. For 728/1092 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 113995 event pairs, 8752 based on Foata normal form. 1/13828 useless extension candidates. Maximal degree in co-relation 37304. Up to 10952 conditions per place. [2022-07-21 08:55:45,925 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2022-07-21 08:55:45,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2022-07-21 08:55:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:55:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:55:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2022-07-21 08:55:45,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2022-07-21 08:55:45,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2022-07-21 08:55:45,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2022-07-21 08:55:45,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:45,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2022-07-21 08:55:45,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:45,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:45,947 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:45,947 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2022-07-21 08:55:45,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2022-07-21 08:55:45,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:55:45,950 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2022-07-21 08:55:45,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-07-21 08:55:45,951 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2022-07-21 08:55:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2022-07-21 08:55:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:45,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:45,952 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:45,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:55:45,952 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 4 more)] === [2022-07-21 08:55:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash 856396636, now seen corresponding path program 1 times [2022-07-21 08:55:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:45,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360242864] [2022-07-21 08:55:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:45,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:46,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:46,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360242864] [2022-07-21 08:55:46,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360242864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585509605] [2022-07-21 08:55:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:46,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:46,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:55:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:46,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:55:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:46,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:46,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585509605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:46,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:46,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 08:55:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196567496] [2022-07-21 08:55:46,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:55:46,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:55:46,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:55:46,979 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:55:46,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:46,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:46,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:55:46,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:50,137 INFO L129 PetriNetUnfolder]: 27630/39510 cut-off events. [2022-07-21 08:55:50,138 INFO L130 PetriNetUnfolder]: For 8413/8511 co-relation queries the response was YES. [2022-07-21 08:55:50,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87882 conditions, 39510 events. 27630/39510 cut-off events. For 8413/8511 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 252409 event pairs, 4983 based on Foata normal form. 0/28288 useless extension candidates. Maximal degree in co-relation 87875. Up to 10656 conditions per place. [2022-07-21 08:55:50,450 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 207 selfloop transitions, 30 changer transitions 1/322 dead transitions. [2022-07-21 08:55:50,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 1316 flow [2022-07-21 08:55:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:55:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 08:55:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1728 transitions. [2022-07-21 08:55:50,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303465765004227 [2022-07-21 08:55:50,454 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1728 transitions. [2022-07-21 08:55:50,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1728 transitions. [2022-07-21 08:55:50,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:50,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1728 transitions. [2022-07-21 08:55:50,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.42857142857143) internal successors, (1728), 14 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:50,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:50,462 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:50,463 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 14 states and 1728 transitions. [2022-07-21 08:55:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 1316 flow [2022-07-21 08:55:50,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 322 transitions, 1289 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-21 08:55:50,471 INFO L242 Difference]: Finished difference. Result has 162 places, 160 transitions, 522 flow [2022-07-21 08:55:50,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-07-21 08:55:50,472 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2022-07-21 08:55:50,472 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 522 flow [2022-07-21 08:55:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:50,473 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:50,473 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:50,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:55:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:50,690 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 4 more)] === [2022-07-21 08:55:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1314069844, now seen corresponding path program 2 times [2022-07-21 08:55:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403933550] [2022-07-21 08:55:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:50,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:51,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403933550] [2022-07-21 08:55:51,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403933550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:51,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:55:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989762071] [2022-07-21 08:55:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:51,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:55:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:55:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:55:51,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:55:51,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:51,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:51,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:55:51,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:53,771 INFO L129 PetriNetUnfolder]: 25967/37698 cut-off events. [2022-07-21 08:55:53,771 INFO L130 PetriNetUnfolder]: For 41843/42094 co-relation queries the response was YES. [2022-07-21 08:55:53,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103428 conditions, 37698 events. 25967/37698 cut-off events. For 41843/42094 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 245982 event pairs, 2103 based on Foata normal form. 325/30114 useless extension candidates. Maximal degree in co-relation 103415. Up to 27357 conditions per place. [2022-07-21 08:55:54,222 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 19 changer transitions 1/202 dead transitions. [2022-07-21 08:55:54,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 924 flow [2022-07-21 08:55:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:55:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:55:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-21 08:55:54,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-21 08:55:54,225 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-21 08:55:54,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-21 08:55:54,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:54,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-21 08:55:54,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:54,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:54,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:54,229 INFO L186 Difference]: Start difference. First operand has 162 places, 160 transitions, 522 flow. Second operand 6 states and 738 transitions. [2022-07-21 08:55:54,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 924 flow [2022-07-21 08:55:54,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 202 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:55:54,384 INFO L242 Difference]: Finished difference. Result has 165 places, 166 transitions, 618 flow [2022-07-21 08:55:54,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=165, PETRI_TRANSITIONS=166} [2022-07-21 08:55:54,385 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 14 predicate places. [2022-07-21 08:55:54,385 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 166 transitions, 618 flow [2022-07-21 08:55:54,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:54,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:54,385 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:54,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:55:54,386 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 4 more)] === [2022-07-21 08:55:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash -598835330, now seen corresponding path program 1 times [2022-07-21 08:55:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27214766] [2022-07-21 08:55:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27214766] [2022-07-21 08:55:54,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27214766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:54,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:54,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:55:54,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333769578] [2022-07-21 08:55:54,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:54,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:55:54,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:55:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:55:54,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:55:54,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 166 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:54,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:54,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:55:54,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:57,269 INFO L129 PetriNetUnfolder]: 25731/36409 cut-off events. [2022-07-21 08:55:57,269 INFO L130 PetriNetUnfolder]: For 60756/60880 co-relation queries the response was YES. [2022-07-21 08:55:57,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107878 conditions, 36409 events. 25731/36409 cut-off events. For 60756/60880 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 226401 event pairs, 5946 based on Foata normal form. 1/27885 useless extension candidates. Maximal degree in co-relation 107862. Up to 27357 conditions per place. [2022-07-21 08:55:57,566 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 105 selfloop transitions, 27 changer transitions 1/217 dead transitions. [2022-07-21 08:55:57,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1163 flow [2022-07-21 08:55:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:55:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:55:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 739 transitions. [2022-07-21 08:55:57,569 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7287968441814595 [2022-07-21 08:55:57,569 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 739 transitions. [2022-07-21 08:55:57,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 739 transitions. [2022-07-21 08:55:57,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:57,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 739 transitions. [2022-07-21 08:55:57,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.16666666666667) internal successors, (739), 6 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:57,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:57,572 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:57,572 INFO L186 Difference]: Start difference. First operand has 165 places, 166 transitions, 618 flow. Second operand 6 states and 739 transitions. [2022-07-21 08:55:57,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1163 flow [2022-07-21 08:55:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1100 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-21 08:55:57,666 INFO L242 Difference]: Finished difference. Result has 169 places, 176 transitions, 748 flow [2022-07-21 08:55:57,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=169, PETRI_TRANSITIONS=176} [2022-07-21 08:55:57,667 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2022-07-21 08:55:57,667 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 176 transitions, 748 flow [2022-07-21 08:55:57,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:57,668 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:57,668 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:55:57,668 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 4 more)] === [2022-07-21 08:55:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash -468160624, now seen corresponding path program 2 times [2022-07-21 08:55:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:57,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336154853] [2022-07-21 08:55:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:57,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336154853] [2022-07-21 08:55:57,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336154853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367239355] [2022-07-21 08:55:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:55:57,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:57,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:57,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:55:58,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:55:58,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:55:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:55:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:58,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:58,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367239355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:58,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:58,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 08:55:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678088698] [2022-07-21 08:55:58,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:55:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:55:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:55:58,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:55:58,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 176 transitions, 748 flow. Second operand has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:58,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:58,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:55:58,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:06,502 INFO L129 PetriNetUnfolder]: 66286/95783 cut-off events. [2022-07-21 08:56:06,502 INFO L130 PetriNetUnfolder]: For 154992/155381 co-relation queries the response was YES. [2022-07-21 08:56:06,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284484 conditions, 95783 events. 66286/95783 cut-off events. For 154992/155381 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 704466 event pairs, 12111 based on Foata normal form. 2409/85526 useless extension candidates. Maximal degree in co-relation 284466. Up to 26948 conditions per place. [2022-07-21 08:56:07,397 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 289 selfloop transitions, 44 changer transitions 1/418 dead transitions. [2022-07-21 08:56:07,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 418 transitions, 2633 flow [2022-07-21 08:56:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:56:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 08:56:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2022-07-21 08:56:07,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7295012679628065 [2022-07-21 08:56:07,401 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2022-07-21 08:56:07,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2022-07-21 08:56:07,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:07,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2022-07-21 08:56:07,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:07,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:07,408 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:07,409 INFO L186 Difference]: Start difference. First operand has 169 places, 176 transitions, 748 flow. Second operand 14 states and 1726 transitions. [2022-07-21 08:56:07,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 418 transitions, 2633 flow [2022-07-21 08:56:08,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 418 transitions, 2606 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:56:08,332 INFO L242 Difference]: Finished difference. Result has 186 places, 190 transitions, 950 flow [2022-07-21 08:56:08,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=950, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-07-21 08:56:08,333 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 35 predicate places. [2022-07-21 08:56:08,333 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 950 flow [2022-07-21 08:56:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:08,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:08,336 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:08,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:56:08,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 08:56:08,551 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 4 more)] === [2022-07-21 08:56:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 601801034, now seen corresponding path program 1 times [2022-07-21 08:56:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:08,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216818139] [2022-07-21 08:56:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:08,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:08,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216818139] [2022-07-21 08:56:08,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216818139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:08,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:08,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:56:08,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99987343] [2022-07-21 08:56:08,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:56:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:56:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:56:08,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:56:08,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 950 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:08,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:08,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:56:08,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:16,659 INFO L129 PetriNetUnfolder]: 65079/94562 cut-off events. [2022-07-21 08:56:16,660 INFO L130 PetriNetUnfolder]: For 278930/279421 co-relation queries the response was YES. [2022-07-21 08:56:17,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325402 conditions, 94562 events. 65079/94562 cut-off events. For 278930/279421 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 705855 event pairs, 30842 based on Foata normal form. 246/82525 useless extension candidates. Maximal degree in co-relation 325378. Up to 76664 conditions per place. [2022-07-21 08:56:17,882 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 120 selfloop transitions, 35 changer transitions 1/240 dead transitions. [2022-07-21 08:56:17,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 1592 flow [2022-07-21 08:56:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:56:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:56:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-21 08:56:17,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-21 08:56:17,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-21 08:56:17,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-21 08:56:17,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:17,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-21 08:56:17,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:17,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:17,911 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:17,911 INFO L186 Difference]: Start difference. First operand has 186 places, 190 transitions, 950 flow. Second operand 6 states and 738 transitions. [2022-07-21 08:56:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 1592 flow [2022-07-21 08:56:18,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 240 transitions, 1543 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-21 08:56:18,768 INFO L242 Difference]: Finished difference. Result has 188 places, 200 transitions, 1146 flow [2022-07-21 08:56:18,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=188, PETRI_TRANSITIONS=200} [2022-07-21 08:56:18,769 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 37 predicate places. [2022-07-21 08:56:18,769 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 200 transitions, 1146 flow [2022-07-21 08:56:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:18,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:18,770 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:18,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:56:18,770 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 4 more)] === [2022-07-21 08:56:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1026495128, now seen corresponding path program 1 times [2022-07-21 08:56:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:18,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037119069] [2022-07-21 08:56:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037119069] [2022-07-21 08:56:19,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037119069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:19,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:19,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:56:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622863207] [2022-07-21 08:56:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:19,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:56:19,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:56:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:56:19,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-21 08:56:19,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 200 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:19,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:19,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-21 08:56:19,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand