./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:31:00,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:31:00,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:31:00,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:31:00,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:31:00,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:31:00,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:31:00,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:31:00,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:31:00,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:31:00,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:31:00,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:31:00,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:31:00,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:31:00,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:31:00,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:31:00,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:31:00,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:31:00,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:31:00,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:31:00,599 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:31:00,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:31:00,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:31:00,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:31:00,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:31:00,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:31:00,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:31:00,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:31:00,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:31:00,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:31:00,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:31:00,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:31:00,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:31:00,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:31:00,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:31:00,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:31:00,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:31:00,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:31:00,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:31:00,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:31:00,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:31:00,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:31:00,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:31:00,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:31:00,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:31:00,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:31:00,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:31:00,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:31:00,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:31:00,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:31:00,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:31:00,654 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:31:00,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:31:00,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:31:00,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:31:00,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:31:00,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:31:00,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:31:00,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:31:00,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:31:00,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:31:00,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:31:00,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:31:00,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:31:00,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:31:00,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:31:00,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:31:00,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:31:00,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:31:00,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:31:00,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:31:00,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:31:00,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:31:00,660 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:31:00,660 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:31:00,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:31:00,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2022-07-19 21:31:00,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:31:00,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:31:00,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:31:00,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:31:00,905 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:31:00,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-07-19 21:31:00,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5564e72a7/9dbdac0e841745a8953689df402857b6/FLAG5c6492c39 [2022-07-19 21:31:01,394 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:31:01,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-07-19 21:31:01,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5564e72a7/9dbdac0e841745a8953689df402857b6/FLAG5c6492c39 [2022-07-19 21:31:01,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5564e72a7/9dbdac0e841745a8953689df402857b6 [2022-07-19 21:31:01,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:31:01,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:31:01,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:31:01,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:31:01,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:31:01,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:31:01" (1/1) ... [2022-07-19 21:31:01,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c861ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:01, skipping insertion in model container [2022-07-19 21:31:01,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:31:01" (1/1) ... [2022-07-19 21:31:01,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:31:01,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:31:02,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2022-07-19 21:31:02,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:31:02,045 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:31:02,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2022-07-19 21:31:02,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:31:02,090 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:31:02,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02 WrapperNode [2022-07-19 21:31:02,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:31:02,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:31:02,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:31:02,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:31:02,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,144 INFO L137 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 460 [2022-07-19 21:31:02,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:31:02,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:31:02,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:31:02,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:31:02,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:31:02,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:31:02,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:31:02,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:31:02,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (1/1) ... [2022-07-19 21:31:02,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:31:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:31:02,235 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) [2022-07-19 21:31:02,252 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 [2022-07-19 21:31:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:31:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:31:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:31:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:31:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:31:02,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:31:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:31:02,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:31:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:31:02,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:31:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:31:02,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:31:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:31:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:31:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:31:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:31:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:31:02,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:31:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:31:02,279 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:31:02,371 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:31:02,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:31:02,897 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:31:03,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:31:03,098 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-19 21:31:03,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:31:03 BoogieIcfgContainer [2022-07-19 21:31:03,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:31:03,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:31:03,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:31:03,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:31:03,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:31:01" (1/3) ... [2022-07-19 21:31:03,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10890fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:31:03, skipping insertion in model container [2022-07-19 21:31:03,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:02" (2/3) ... [2022-07-19 21:31:03,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10890fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:31:03, skipping insertion in model container [2022-07-19 21:31:03,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:31:03" (3/3) ... [2022-07-19 21:31:03,111 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2022-07-19 21:31:03,116 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:31:03,124 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:31:03,125 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:31:03,125 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:31:03,223 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:31:03,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 332 places, 356 transitions, 744 flow [2022-07-19 21:31:03,408 INFO L129 PetriNetUnfolder]: 37/352 cut-off events. [2022-07-19 21:31:03,410 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:31:03,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 352 events. 37/352 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 239 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 308. Up to 8 conditions per place. [2022-07-19 21:31:03,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 356 transitions, 744 flow [2022-07-19 21:31:03,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 339 transitions, 702 flow [2022-07-19 21:31:03,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:31:03,452 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@3d86b5b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db2e8e8 [2022-07-19 21:31:03,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:31:03,529 INFO L129 PetriNetUnfolder]: 37/338 cut-off events. [2022-07-19 21:31:03,529 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:31:03,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:03,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:03,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2078507532, now seen corresponding path program 1 times [2022-07-19 21:31:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135738757] [2022-07-19 21:31:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135738757] [2022-07-19 21:31:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135738757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:03,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:03,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:31:03,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425534445] [2022-07-19 21:31:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:03,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:31:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:31:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:31:03,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 356 [2022-07-19 21:31:03,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 339 transitions, 702 flow. Second operand has 2 states, 2 states have (on average 325.0) internal successors, (650), 2 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:03,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:03,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 356 [2022-07-19 21:31:03,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:04,063 INFO L129 PetriNetUnfolder]: 56/358 cut-off events. [2022-07-19 21:31:04,064 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:31:04,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 358 events. 56/358 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 264 event pairs, 0 based on Foata normal form. 29/355 useless extension candidates. Maximal degree in co-relation 334. Up to 57 conditions per place. [2022-07-19 21:31:04,070 INFO L132 encePairwiseOnDemand]: 339/356 looper letters, 20 selfloop transitions, 0 changer transitions 9/322 dead transitions. [2022-07-19 21:31:04,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 322 transitions, 708 flow [2022-07-19 21:31:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:31:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:31:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 673 transitions. [2022-07-19 21:31:04,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9452247191011236 [2022-07-19 21:31:04,091 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 673 transitions. [2022-07-19 21:31:04,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 673 transitions. [2022-07-19 21:31:04,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:04,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 673 transitions. [2022-07-19 21:31:04,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 336.5) internal successors, (673), 2 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,114 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,116 INFO L186 Difference]: Start difference. First operand has 315 places, 339 transitions, 702 flow. Second operand 2 states and 673 transitions. [2022-07-19 21:31:04,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 322 transitions, 708 flow [2022-07-19 21:31:04,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 322 transitions, 692 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:31:04,133 INFO L242 Difference]: Finished difference. Result has 308 places, 313 transitions, 634 flow [2022-07-19 21:31:04,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=634, PETRI_PLACES=308, PETRI_TRANSITIONS=313} [2022-07-19 21:31:04,142 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -7 predicate places. [2022-07-19 21:31:04,142 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 313 transitions, 634 flow [2022-07-19 21:31:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.0) internal successors, (650), 2 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:04,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:31:04,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1859772742, now seen corresponding path program 1 times [2022-07-19 21:31:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:04,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698135629] [2022-07-19 21:31:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:04,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:04,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698135629] [2022-07-19 21:31:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698135629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:04,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:04,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:31:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852426698] [2022-07-19 21:31:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:04,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:31:04,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:31:04,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:31:04,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 356 [2022-07-19 21:31:04,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 313 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:04,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 356 [2022-07-19 21:31:04,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:04,785 INFO L129 PetriNetUnfolder]: 107/476 cut-off events. [2022-07-19 21:31:04,786 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:31:04,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 476 events. 107/476 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 635. Up to 85 conditions per place. [2022-07-19 21:31:04,791 INFO L132 encePairwiseOnDemand]: 346/356 looper letters, 69 selfloop transitions, 7 changer transitions 4/335 dead transitions. [2022-07-19 21:31:04,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 335 transitions, 845 flow [2022-07-19 21:31:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:31:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:31:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1436 transitions. [2022-07-19 21:31:04,796 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8067415730337079 [2022-07-19 21:31:04,796 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1436 transitions. [2022-07-19 21:31:04,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1436 transitions. [2022-07-19 21:31:04,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:04,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1436 transitions. [2022-07-19 21:31:04,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 287.2) internal successors, (1436), 5 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,805 INFO L186 Difference]: Start difference. First operand has 308 places, 313 transitions, 634 flow. Second operand 5 states and 1436 transitions. [2022-07-19 21:31:04,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 335 transitions, 845 flow [2022-07-19 21:31:04,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 335 transitions, 845 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:31:04,815 INFO L242 Difference]: Finished difference. Result has 306 places, 319 transitions, 685 flow [2022-07-19 21:31:04,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=685, PETRI_PLACES=306, PETRI_TRANSITIONS=319} [2022-07-19 21:31:04,817 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -9 predicate places. [2022-07-19 21:31:04,817 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 319 transitions, 685 flow [2022-07-19 21:31:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:04,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:04,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:31:04,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -739310667, now seen corresponding path program 1 times [2022-07-19 21:31:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430297929] [2022-07-19 21:31:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:05,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430297929] [2022-07-19 21:31:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430297929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:05,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:05,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847561145] [2022-07-19 21:31:05,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:05,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:05,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:05,083 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-19 21:31:05,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 319 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:05,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-19 21:31:05,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:05,235 INFO L129 PetriNetUnfolder]: 171/648 cut-off events. [2022-07-19 21:31:05,235 INFO L130 PetriNetUnfolder]: For 86/90 co-relation queries the response was YES. [2022-07-19 21:31:05,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 648 events. 171/648 cut-off events. For 86/90 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1483 event pairs, 3 based on Foata normal form. 19/590 useless extension candidates. Maximal degree in co-relation 950. Up to 124 conditions per place. [2022-07-19 21:31:05,245 INFO L132 encePairwiseOnDemand]: 345/356 looper letters, 43 selfloop transitions, 8 changer transitions 0/337 dead transitions. [2022-07-19 21:31:05,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 337 transitions, 844 flow [2022-07-19 21:31:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 978 transitions. [2022-07-19 21:31:05,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9157303370786517 [2022-07-19 21:31:05,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 978 transitions. [2022-07-19 21:31:05,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 978 transitions. [2022-07-19 21:31:05,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:05,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 978 transitions. [2022-07-19 21:31:05,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,255 INFO L186 Difference]: Start difference. First operand has 306 places, 319 transitions, 685 flow. Second operand 3 states and 978 transitions. [2022-07-19 21:31:05,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 337 transitions, 844 flow [2022-07-19 21:31:05,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 337 transitions, 830 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:31:05,263 INFO L242 Difference]: Finished difference. Result has 304 places, 322 transitions, 722 flow [2022-07-19 21:31:05,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=722, PETRI_PLACES=304, PETRI_TRANSITIONS=322} [2022-07-19 21:31:05,265 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -11 predicate places. [2022-07-19 21:31:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 322 transitions, 722 flow [2022-07-19 21:31:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:05,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:05,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:31:05,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash -827331275, now seen corresponding path program 1 times [2022-07-19 21:31:05,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:05,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534207969] [2022-07-19 21:31:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:05,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534207969] [2022-07-19 21:31:05,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534207969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:05,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:05,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829113597] [2022-07-19 21:31:05,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:05,410 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 356 [2022-07-19 21:31:05,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 322 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:05,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 356 [2022-07-19 21:31:05,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:05,632 INFO L129 PetriNetUnfolder]: 317/1067 cut-off events. [2022-07-19 21:31:05,632 INFO L130 PetriNetUnfolder]: For 274/286 co-relation queries the response was YES. [2022-07-19 21:31:05,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1067 events. 317/1067 cut-off events. For 274/286 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4024 event pairs, 15 based on Foata normal form. 15/926 useless extension candidates. Maximal degree in co-relation 1731. Up to 194 conditions per place. [2022-07-19 21:31:05,648 INFO L132 encePairwiseOnDemand]: 353/356 looper letters, 57 selfloop transitions, 2 changer transitions 0/348 dead transitions. [2022-07-19 21:31:05,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 348 transitions, 946 flow [2022-07-19 21:31:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-07-19 21:31:05,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9222846441947565 [2022-07-19 21:31:05,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-07-19 21:31:05,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-07-19 21:31:05,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:05,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-07-19 21:31:05,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,658 INFO L186 Difference]: Start difference. First operand has 304 places, 322 transitions, 722 flow. Second operand 3 states and 985 transitions. [2022-07-19 21:31:05,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 348 transitions, 946 flow [2022-07-19 21:31:05,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 348 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:31:05,665 INFO L242 Difference]: Finished difference. Result has 306 places, 323 transitions, 728 flow [2022-07-19 21:31:05,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=728, PETRI_PLACES=306, PETRI_TRANSITIONS=323} [2022-07-19 21:31:05,666 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -9 predicate places. [2022-07-19 21:31:05,666 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 323 transitions, 728 flow [2022-07-19 21:31:05,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:05,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:31:05,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1704022611, now seen corresponding path program 1 times [2022-07-19 21:31:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:05,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478143885] [2022-07-19 21:31:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:05,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:05,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478143885] [2022-07-19 21:31:05,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478143885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:05,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:05,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:31:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006057966] [2022-07-19 21:31:05,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:31:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:31:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:31:05,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-19 21:31:05,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 323 transitions, 728 flow. Second operand has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:05,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:05,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-19 21:31:05,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:06,222 INFO L129 PetriNetUnfolder]: 579/1866 cut-off events. [2022-07-19 21:31:06,223 INFO L130 PetriNetUnfolder]: For 684/700 co-relation queries the response was YES. [2022-07-19 21:31:06,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1866 events. 579/1866 cut-off events. For 684/700 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10102 event pairs, 29 based on Foata normal form. 33/1569 useless extension candidates. Maximal degree in co-relation 3119. Up to 362 conditions per place. [2022-07-19 21:31:06,253 INFO L132 encePairwiseOnDemand]: 349/356 looper letters, 58 selfloop transitions, 6 changer transitions 0/350 dead transitions. [2022-07-19 21:31:06,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 350 transitions, 970 flow [2022-07-19 21:31:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:31:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:31:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1290 transitions. [2022-07-19 21:31:06,257 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9058988764044944 [2022-07-19 21:31:06,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1290 transitions. [2022-07-19 21:31:06,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1290 transitions. [2022-07-19 21:31:06,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:06,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1290 transitions. [2022-07-19 21:31:06,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:06,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:06,264 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:06,264 INFO L186 Difference]: Start difference. First operand has 306 places, 323 transitions, 728 flow. Second operand 4 states and 1290 transitions. [2022-07-19 21:31:06,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 350 transitions, 970 flow [2022-07-19 21:31:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 350 transitions, 967 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:31:06,273 INFO L242 Difference]: Finished difference. Result has 309 places, 324 transitions, 748 flow [2022-07-19 21:31:06,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=309, PETRI_TRANSITIONS=324} [2022-07-19 21:31:06,276 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -6 predicate places. [2022-07-19 21:31:06,276 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 324 transitions, 748 flow [2022-07-19 21:31:06,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:06,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:06,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:06,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:31:06,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:06,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1675148344, now seen corresponding path program 1 times [2022-07-19 21:31:06,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:06,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452860634] [2022-07-19 21:31:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:06,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452860634] [2022-07-19 21:31:06,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452860634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:06,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:06,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528311391] [2022-07-19 21:31:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:06,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:06,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:06,410 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-19 21:31:06,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 324 transitions, 748 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:06,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:06,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-19 21:31:06,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:06,976 INFO L129 PetriNetUnfolder]: 1212/3067 cut-off events. [2022-07-19 21:31:06,977 INFO L130 PetriNetUnfolder]: For 1598/1724 co-relation queries the response was YES. [2022-07-19 21:31:06,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5825 conditions, 3067 events. 1212/3067 cut-off events. For 1598/1724 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18615 event pairs, 155 based on Foata normal form. 27/2526 useless extension candidates. Maximal degree in co-relation 5817. Up to 847 conditions per place. [2022-07-19 21:31:07,024 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 52 selfloop transitions, 6 changer transitions 0/346 dead transitions. [2022-07-19 21:31:07,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 346 transitions, 965 flow [2022-07-19 21:31:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2022-07-19 21:31:07,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9176029962546817 [2022-07-19 21:31:07,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2022-07-19 21:31:07,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2022-07-19 21:31:07,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:07,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2022-07-19 21:31:07,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,034 INFO L186 Difference]: Start difference. First operand has 309 places, 324 transitions, 748 flow. Second operand 3 states and 980 transitions. [2022-07-19 21:31:07,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 346 transitions, 965 flow [2022-07-19 21:31:07,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 346 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:07,043 INFO L242 Difference]: Finished difference. Result has 311 places, 325 transitions, 768 flow [2022-07-19 21:31:07,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=311, PETRI_TRANSITIONS=325} [2022-07-19 21:31:07,044 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -4 predicate places. [2022-07-19 21:31:07,044 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 768 flow [2022-07-19 21:31:07,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:07,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:07,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:31:07,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 416774542, now seen corresponding path program 1 times [2022-07-19 21:31:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483622737] [2022-07-19 21:31:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:31:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:07,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483622737] [2022-07-19 21:31:07,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483622737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:07,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:07,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:31:07,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555094357] [2022-07-19 21:31:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:31:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:31:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:31:07,163 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 356 [2022-07-19 21:31:07,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 325 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:07,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 356 [2022-07-19 21:31:07,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:07,854 INFO L129 PetriNetUnfolder]: 807/2922 cut-off events. [2022-07-19 21:31:07,854 INFO L130 PetriNetUnfolder]: For 1988/2177 co-relation queries the response was YES. [2022-07-19 21:31:07,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2922 events. 807/2922 cut-off events. For 1988/2177 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 18591 event pairs, 117 based on Foata normal form. 95/2492 useless extension candidates. Maximal degree in co-relation 5127. Up to 794 conditions per place. [2022-07-19 21:31:07,891 INFO L132 encePairwiseOnDemand]: 344/356 looper letters, 128 selfloop transitions, 11 changer transitions 0/383 dead transitions. [2022-07-19 21:31:07,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 383 transitions, 1194 flow [2022-07-19 21:31:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:31:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:31:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2539 transitions. [2022-07-19 21:31:07,897 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924469413233458 [2022-07-19 21:31:07,897 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2539 transitions. [2022-07-19 21:31:07,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2539 transitions. [2022-07-19 21:31:07,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:07,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2539 transitions. [2022-07-19 21:31:07,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 282.1111111111111) internal successors, (2539), 9 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,908 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,909 INFO L186 Difference]: Start difference. First operand has 311 places, 325 transitions, 768 flow. Second operand 9 states and 2539 transitions. [2022-07-19 21:31:07,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 383 transitions, 1194 flow [2022-07-19 21:31:07,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 383 transitions, 1182 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:07,918 INFO L242 Difference]: Finished difference. Result has 319 places, 329 transitions, 802 flow [2022-07-19 21:31:07,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=802, PETRI_PLACES=319, PETRI_TRANSITIONS=329} [2022-07-19 21:31:07,919 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 4 predicate places. [2022-07-19 21:31:07,920 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 329 transitions, 802 flow [2022-07-19 21:31:07,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:07,922 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:07,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:31:07,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash -747523834, now seen corresponding path program 1 times [2022-07-19 21:31:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:07,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027512863] [2022-07-19 21:31:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:07,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:31:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027512863] [2022-07-19 21:31:07,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027512863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:07,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:07,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:07,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703480984] [2022-07-19 21:31:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:07,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:07,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:08,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-19 21:31:08,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 329 transitions, 802 flow. Second operand has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:08,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:08,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-19 21:31:08,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:08,546 INFO L129 PetriNetUnfolder]: 1134/2460 cut-off events. [2022-07-19 21:31:08,546 INFO L130 PetriNetUnfolder]: For 2043/2210 co-relation queries the response was YES. [2022-07-19 21:31:08,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 2460 events. 1134/2460 cut-off events. For 2043/2210 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10131 event pairs, 43 based on Foata normal form. 2/2251 useless extension candidates. Maximal degree in co-relation 5564. Up to 1047 conditions per place. [2022-07-19 21:31:08,590 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 48 selfloop transitions, 5 changer transitions 3/338 dead transitions. [2022-07-19 21:31:08,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 338 transitions, 936 flow [2022-07-19 21:31:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-19 21:31:08,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900749063670412 [2022-07-19 21:31:08,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-19 21:31:08,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-19 21:31:08,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:08,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-19 21:31:08,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:08,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:08,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:08,600 INFO L186 Difference]: Start difference. First operand has 319 places, 329 transitions, 802 flow. Second operand 3 states and 962 transitions. [2022-07-19 21:31:08,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 338 transitions, 936 flow [2022-07-19 21:31:08,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 338 transitions, 927 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:31:08,609 INFO L242 Difference]: Finished difference. Result has 320 places, 323 transitions, 782 flow [2022-07-19 21:31:08,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=782, PETRI_PLACES=320, PETRI_TRANSITIONS=323} [2022-07-19 21:31:08,611 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 5 predicate places. [2022-07-19 21:31:08,612 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 323 transitions, 782 flow [2022-07-19 21:31:08,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:08,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:08,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:31:08,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1727903045, now seen corresponding path program 1 times [2022-07-19 21:31:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675374146] [2022-07-19 21:31:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675374146] [2022-07-19 21:31:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675374146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:31:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140028676] [2022-07-19 21:31:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:31:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:31:09,660 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) [2022-07-19 21:31:09,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:31:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:09,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 21:31:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:31:10,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 21:31:12,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:12,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:12,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:12,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:13,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:31:15,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:31:15,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 56 [2022-07-19 21:31:15,040 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:31:15,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1606 treesize of output 1549 [2022-07-19 21:31:15,057 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:15,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1542 treesize of output 1158 [2022-07-19 21:31:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:31:15,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 579 treesize of output 531 [2022-07-19 21:31:15,089 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:15,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1110 treesize of output 918 [2022-07-19 21:31:15,109 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:15,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 918 treesize of output 822 [2022-07-19 21:31:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140028676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:31:16,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:31:16,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 24] total 65 [2022-07-19 21:31:16,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387125922] [2022-07-19 21:31:16,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:31:16,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-19 21:31:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-19 21:31:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=3343, Unknown=102, NotChecked=0, Total=4160 [2022-07-19 21:31:16,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 356 [2022-07-19 21:31:16,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 323 transitions, 782 flow. Second operand has 65 states, 65 states have (on average 177.2153846153846) internal successors, (11519), 65 states have internal predecessors, (11519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:16,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:16,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 356 [2022-07-19 21:31:16,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:21,945 INFO L129 PetriNetUnfolder]: 3097/8217 cut-off events. [2022-07-19 21:31:21,945 INFO L130 PetriNetUnfolder]: For 7282/7910 co-relation queries the response was YES. [2022-07-19 21:31:22,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17972 conditions, 8217 events. 3097/8217 cut-off events. For 7282/7910 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 62967 event pairs, 51 based on Foata normal form. 38/7282 useless extension candidates. Maximal degree in co-relation 17960. Up to 1896 conditions per place. [2022-07-19 21:31:22,071 INFO L132 encePairwiseOnDemand]: 305/356 looper letters, 423 selfloop transitions, 86 changer transitions 13/688 dead transitions. [2022-07-19 21:31:22,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 688 transitions, 2975 flow [2022-07-19 21:31:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:31:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:31:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 9451 transitions. [2022-07-19 21:31:22,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5105337078651685 [2022-07-19 21:31:22,095 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 9451 transitions. [2022-07-19 21:31:22,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 9451 transitions. [2022-07-19 21:31:22,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:22,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 9451 transitions. [2022-07-19 21:31:22,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 181.75) internal successors, (9451), 52 states have internal predecessors, (9451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:22,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 356.0) internal successors, (18868), 53 states have internal predecessors, (18868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:22,158 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 356.0) internal successors, (18868), 53 states have internal predecessors, (18868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:22,159 INFO L186 Difference]: Start difference. First operand has 320 places, 323 transitions, 782 flow. Second operand 52 states and 9451 transitions. [2022-07-19 21:31:22,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 688 transitions, 2975 flow [2022-07-19 21:31:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 688 transitions, 2926 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:31:22,176 INFO L242 Difference]: Finished difference. Result has 388 places, 389 transitions, 1449 flow [2022-07-19 21:31:22,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1449, PETRI_PLACES=388, PETRI_TRANSITIONS=389} [2022-07-19 21:31:22,178 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 73 predicate places. [2022-07-19 21:31:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 389 transitions, 1449 flow [2022-07-19 21:31:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 177.2153846153846) internal successors, (11519), 65 states have internal predecessors, (11519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:22,181 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:22,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:22,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:31:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:31:22,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1522801112, now seen corresponding path program 1 times [2022-07-19 21:31:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:22,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222708556] [2022-07-19 21:31:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:22,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:31:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222708556] [2022-07-19 21:31:22,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222708556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:22,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:22,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677174984] [2022-07-19 21:31:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:22,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:22,473 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-19 21:31:22,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 389 transitions, 1449 flow. Second operand has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:22,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:22,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-19 21:31:22,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:24,131 INFO L129 PetriNetUnfolder]: 3763/9828 cut-off events. [2022-07-19 21:31:24,131 INFO L130 PetriNetUnfolder]: For 23968/25350 co-relation queries the response was YES. [2022-07-19 21:31:24,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26056 conditions, 9828 events. 3763/9828 cut-off events. For 23968/25350 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 82468 event pairs, 366 based on Foata normal form. 27/8398 useless extension candidates. Maximal degree in co-relation 26022. Up to 3094 conditions per place. [2022-07-19 21:31:24,472 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 78 selfloop transitions, 6 changer transitions 0/399 dead transitions. [2022-07-19 21:31:24,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 399 transitions, 1660 flow [2022-07-19 21:31:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-07-19 21:31:24,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9185393258426966 [2022-07-19 21:31:24,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-07-19 21:31:24,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-07-19 21:31:24,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:24,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-07-19 21:31:24,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:24,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:24,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:24,487 INFO L186 Difference]: Start difference. First operand has 388 places, 389 transitions, 1449 flow. Second operand 3 states and 981 transitions. [2022-07-19 21:31:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 399 transitions, 1660 flow [2022-07-19 21:31:24,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 399 transitions, 1586 flow, removed 21 selfloop flow, removed 20 redundant places. [2022-07-19 21:31:24,517 INFO L242 Difference]: Finished difference. Result has 368 places, 382 transitions, 1337 flow [2022-07-19 21:31:24,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1337, PETRI_PLACES=368, PETRI_TRANSITIONS=382} [2022-07-19 21:31:24,520 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 53 predicate places. [2022-07-19 21:31:24,520 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 382 transitions, 1337 flow [2022-07-19 21:31:24,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:24,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:24,521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:24,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:31:24,521 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:24,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2014399, now seen corresponding path program 1 times [2022-07-19 21:31:24,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:24,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603199061] [2022-07-19 21:31:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:24,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:31:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603199061] [2022-07-19 21:31:24,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603199061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:24,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:24,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905714491] [2022-07-19 21:31:24,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:24,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:24,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:24,607 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-19 21:31:24,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 382 transitions, 1337 flow. Second operand has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:24,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:24,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-19 21:31:24,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:26,423 INFO L129 PetriNetUnfolder]: 3682/10359 cut-off events. [2022-07-19 21:31:26,423 INFO L130 PetriNetUnfolder]: For 27950/30229 co-relation queries the response was YES. [2022-07-19 21:31:26,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27354 conditions, 10359 events. 3682/10359 cut-off events. For 27950/30229 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 94298 event pairs, 566 based on Foata normal form. 19/9120 useless extension candidates. Maximal degree in co-relation 27322. Up to 3005 conditions per place. [2022-07-19 21:31:26,578 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 62 selfloop transitions, 6 changer transitions 0/383 dead transitions. [2022-07-19 21:31:26,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 383 transitions, 1453 flow [2022-07-19 21:31:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2022-07-19 21:31:26,581 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9176029962546817 [2022-07-19 21:31:26,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2022-07-19 21:31:26,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2022-07-19 21:31:26,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:26,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2022-07-19 21:31:26,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:26,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:26,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:26,586 INFO L186 Difference]: Start difference. First operand has 368 places, 382 transitions, 1337 flow. Second operand 3 states and 980 transitions. [2022-07-19 21:31:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 383 transitions, 1453 flow [2022-07-19 21:31:26,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 383 transitions, 1409 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-07-19 21:31:26,620 INFO L242 Difference]: Finished difference. Result has 365 places, 367 transitions, 1195 flow [2022-07-19 21:31:26,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1195, PETRI_PLACES=365, PETRI_TRANSITIONS=367} [2022-07-19 21:31:26,621 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 50 predicate places. [2022-07-19 21:31:26,621 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 367 transitions, 1195 flow [2022-07-19 21:31:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:26,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:26,622 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:31:26,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1065299214, now seen corresponding path program 1 times [2022-07-19 21:31:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936701705] [2022-07-19 21:31:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:31:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936701705] [2022-07-19 21:31:26,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936701705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:26,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:26,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:31:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880519591] [2022-07-19 21:31:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:31:26,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:31:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:31:26,878 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-19 21:31:26,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 367 transitions, 1195 flow. Second operand has 4 states, 4 states have (on average 315.25) internal successors, (1261), 4 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:26,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:26,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-19 21:31:26,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:27,959 INFO L129 PetriNetUnfolder]: 1834/6691 cut-off events. [2022-07-19 21:31:27,959 INFO L130 PetriNetUnfolder]: For 16388/17522 co-relation queries the response was YES. [2022-07-19 21:31:28,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16277 conditions, 6691 events. 1834/6691 cut-off events. For 16388/17522 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 57108 event pairs, 154 based on Foata normal form. 128/6060 useless extension candidates. Maximal degree in co-relation 16246. Up to 1733 conditions per place. [2022-07-19 21:31:28,086 INFO L132 encePairwiseOnDemand]: 349/356 looper letters, 67 selfloop transitions, 6 changer transitions 0/386 dead transitions. [2022-07-19 21:31:28,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 386 transitions, 1477 flow [2022-07-19 21:31:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:31:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:31:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1287 transitions. [2022-07-19 21:31:28,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9037921348314607 [2022-07-19 21:31:28,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1287 transitions. [2022-07-19 21:31:28,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1287 transitions. [2022-07-19 21:31:28,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:28,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1287 transitions. [2022-07-19 21:31:28,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.75) internal successors, (1287), 4 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:28,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:28,097 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:28,097 INFO L186 Difference]: Start difference. First operand has 365 places, 367 transitions, 1195 flow. Second operand 4 states and 1287 transitions. [2022-07-19 21:31:28,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 386 transitions, 1477 flow [2022-07-19 21:31:28,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 386 transitions, 1457 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:28,118 INFO L242 Difference]: Finished difference. Result has 366 places, 363 transitions, 1163 flow [2022-07-19 21:31:28,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1163, PETRI_PLACES=366, PETRI_TRANSITIONS=363} [2022-07-19 21:31:28,121 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 51 predicate places. [2022-07-19 21:31:28,121 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 363 transitions, 1163 flow [2022-07-19 21:31:28,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.25) internal successors, (1261), 4 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:28,121 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:28,122 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:28,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:31:28,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash -992488946, now seen corresponding path program 2 times [2022-07-19 21:31:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:28,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888107670] [2022-07-19 21:31:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:28,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:31:28,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888107670] [2022-07-19 21:31:28,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888107670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:28,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:28,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73904055] [2022-07-19 21:31:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:28,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:28,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-19 21:31:28,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 363 transitions, 1163 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:28,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:28,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-19 21:31:28,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:30,376 INFO L129 PetriNetUnfolder]: 4662/11462 cut-off events. [2022-07-19 21:31:30,376 INFO L130 PetriNetUnfolder]: For 41866/43881 co-relation queries the response was YES. [2022-07-19 21:31:30,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35559 conditions, 11462 events. 4662/11462 cut-off events. For 41866/43881 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 94879 event pairs, 469 based on Foata normal form. 0/10131 useless extension candidates. Maximal degree in co-relation 35527. Up to 4433 conditions per place. [2022-07-19 21:31:30,583 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 62 selfloop transitions, 10 changer transitions 0/379 dead transitions. [2022-07-19 21:31:30,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 379 transitions, 1421 flow [2022-07-19 21:31:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-19 21:31:30,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900749063670412 [2022-07-19 21:31:30,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-19 21:31:30,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-19 21:31:30,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:30,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-19 21:31:30,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:30,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:30,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:30,591 INFO L186 Difference]: Start difference. First operand has 366 places, 363 transitions, 1163 flow. Second operand 3 states and 962 transitions. [2022-07-19 21:31:30,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 379 transitions, 1421 flow [2022-07-19 21:31:30,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 379 transitions, 1411 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:30,614 INFO L242 Difference]: Finished difference. Result has 368 places, 364 transitions, 1201 flow [2022-07-19 21:31:30,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1201, PETRI_PLACES=368, PETRI_TRANSITIONS=364} [2022-07-19 21:31:30,615 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 53 predicate places. [2022-07-19 21:31:30,615 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 364 transitions, 1201 flow [2022-07-19 21:31:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:30,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:30,616 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:31:30,617 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1691425328, now seen corresponding path program 3 times [2022-07-19 21:31:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:30,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041190215] [2022-07-19 21:31:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041190215] [2022-07-19 21:31:31,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041190215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:31:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913691991] [2022-07-19 21:31:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:31:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:31:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:31:31,440 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) [2022-07-19 21:31:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:31:31,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:31:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:31:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:31:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:31:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:31:32,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:31:32,124 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:31:32,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 21:31:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:31:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913691991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:31:32,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:31:32,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 7] total 28 [2022-07-19 21:31:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311362566] [2022-07-19 21:31:32,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:31:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:31:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:31:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:31:32,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 356 [2022-07-19 21:31:32,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 364 transitions, 1201 flow. Second operand has 28 states, 28 states have (on average 193.71428571428572) internal successors, (5424), 28 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:32,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:32,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 356 [2022-07-19 21:31:32,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:36,656 INFO L129 PetriNetUnfolder]: 3274/10592 cut-off events. [2022-07-19 21:31:36,657 INFO L130 PetriNetUnfolder]: For 27029/28895 co-relation queries the response was YES. [2022-07-19 21:31:36,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29053 conditions, 10592 events. 3274/10592 cut-off events. For 27029/28895 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 92628 event pairs, 364 based on Foata normal form. 37/9501 useless extension candidates. Maximal degree in co-relation 29020. Up to 4010 conditions per place. [2022-07-19 21:31:36,826 INFO L132 encePairwiseOnDemand]: 307/356 looper letters, 313 selfloop transitions, 104 changer transitions 34/625 dead transitions. [2022-07-19 21:31:36,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 625 transitions, 2967 flow [2022-07-19 21:31:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 21:31:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-19 21:31:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8548 transitions. [2022-07-19 21:31:36,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5457099080694586 [2022-07-19 21:31:36,846 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8548 transitions. [2022-07-19 21:31:36,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8548 transitions. [2022-07-19 21:31:36,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:36,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8548 transitions. [2022-07-19 21:31:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 194.27272727272728) internal successors, (8548), 44 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:36,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 356.0) internal successors, (16020), 45 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:36,888 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 356.0) internal successors, (16020), 45 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:36,888 INFO L186 Difference]: Start difference. First operand has 368 places, 364 transitions, 1201 flow. Second operand 44 states and 8548 transitions. [2022-07-19 21:31:36,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 625 transitions, 2967 flow [2022-07-19 21:31:36,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 625 transitions, 2939 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:36,916 INFO L242 Difference]: Finished difference. Result has 426 places, 419 transitions, 1805 flow [2022-07-19 21:31:36,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1805, PETRI_PLACES=426, PETRI_TRANSITIONS=419} [2022-07-19 21:31:36,918 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 111 predicate places. [2022-07-19 21:31:36,918 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 419 transitions, 1805 flow [2022-07-19 21:31:36,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 193.71428571428572) internal successors, (5424), 28 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:36,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:36,920 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:36,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:31:37,135 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,SelfDestructingSolverStorable13 [2022-07-19 21:31:37,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1280372849, now seen corresponding path program 1 times [2022-07-19 21:31:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:37,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577762499] [2022-07-19 21:31:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:31:37,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577762499] [2022-07-19 21:31:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577762499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:37,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:31:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799951821] [2022-07-19 21:31:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:37,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:31:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:31:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:31:37,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-19 21:31:37,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 419 transitions, 1805 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:37,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:37,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-19 21:31:37,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:39,465 INFO L129 PetriNetUnfolder]: 4472/11607 cut-off events. [2022-07-19 21:31:39,465 INFO L130 PetriNetUnfolder]: For 51630/53657 co-relation queries the response was YES. [2022-07-19 21:31:39,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38499 conditions, 11607 events. 4472/11607 cut-off events. For 51630/53657 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 92330 event pairs, 566 based on Foata normal form. 50/10552 useless extension candidates. Maximal degree in co-relation 38449. Up to 4219 conditions per place. [2022-07-19 21:31:39,777 INFO L132 encePairwiseOnDemand]: 350/356 looper letters, 84 selfloop transitions, 5 changer transitions 0/438 dead transitions. [2022-07-19 21:31:39,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 438 transitions, 2149 flow [2022-07-19 21:31:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:31:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:31:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 964 transitions. [2022-07-19 21:31:39,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9026217228464419 [2022-07-19 21:31:39,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 964 transitions. [2022-07-19 21:31:39,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 964 transitions. [2022-07-19 21:31:39,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:39,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 964 transitions. [2022-07-19 21:31:39,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:39,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:39,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:39,783 INFO L186 Difference]: Start difference. First operand has 426 places, 419 transitions, 1805 flow. Second operand 3 states and 964 transitions. [2022-07-19 21:31:39,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 438 transitions, 2149 flow [2022-07-19 21:31:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 438 transitions, 2008 flow, removed 31 selfloop flow, removed 21 redundant places. [2022-07-19 21:31:39,834 INFO L242 Difference]: Finished difference. Result has 407 places, 420 transitions, 1712 flow [2022-07-19 21:31:39,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1712, PETRI_PLACES=407, PETRI_TRANSITIONS=420} [2022-07-19 21:31:39,835 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 92 predicate places. [2022-07-19 21:31:39,835 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 420 transitions, 1712 flow [2022-07-19 21:31:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:39,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:39,836 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:39,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:31:39,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -64278155, now seen corresponding path program 1 times [2022-07-19 21:31:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377074049] [2022-07-19 21:31:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:31:39,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377074049] [2022-07-19 21:31:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377074049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:31:39,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:31:39,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:31:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279222929] [2022-07-19 21:31:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:31:39,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:31:39,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:31:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:31:39,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 356 [2022-07-19 21:31:39,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 420 transitions, 1712 flow. Second operand has 6 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:39,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:39,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 356 [2022-07-19 21:31:39,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:41,361 INFO L129 PetriNetUnfolder]: 1591/7498 cut-off events. [2022-07-19 21:31:41,362 INFO L130 PetriNetUnfolder]: For 11434/12293 co-relation queries the response was YES. [2022-07-19 21:31:41,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16759 conditions, 7498 events. 1591/7498 cut-off events. For 11434/12293 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 63874 event pairs, 249 based on Foata normal form. 6/6849 useless extension candidates. Maximal degree in co-relation 16710. Up to 1990 conditions per place. [2022-07-19 21:31:41,443 INFO L132 encePairwiseOnDemand]: 346/356 looper letters, 123 selfloop transitions, 10 changer transitions 49/452 dead transitions. [2022-07-19 21:31:41,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 452 transitions, 2220 flow [2022-07-19 21:31:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:31:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:31:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2510 transitions. [2022-07-19 21:31:41,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7833957553058677 [2022-07-19 21:31:41,446 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2510 transitions. [2022-07-19 21:31:41,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2510 transitions. [2022-07-19 21:31:41,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:31:41,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2510 transitions. [2022-07-19 21:31:41,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 278.8888888888889) internal successors, (2510), 9 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:41,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:41,453 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:41,453 INFO L186 Difference]: Start difference. First operand has 407 places, 420 transitions, 1712 flow. Second operand 9 states and 2510 transitions. [2022-07-19 21:31:41,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 452 transitions, 2220 flow [2022-07-19 21:31:41,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 452 transitions, 2210 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:31:41,476 INFO L242 Difference]: Finished difference. Result has 415 places, 401 transitions, 1564 flow [2022-07-19 21:31:41,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1564, PETRI_PLACES=415, PETRI_TRANSITIONS=401} [2022-07-19 21:31:41,477 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 100 predicate places. [2022-07-19 21:31:41,477 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 401 transitions, 1564 flow [2022-07-19 21:31:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:41,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:31:41,478 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:31:41,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:31:41,479 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:31:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:31:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -347910832, now seen corresponding path program 1 times [2022-07-19 21:31:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:31:41,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024296424] [2022-07-19 21:31:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:31:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:31:42,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:31:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024296424] [2022-07-19 21:31:42,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024296424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:31:42,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829626] [2022-07-19 21:31:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:31:42,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:31:42,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:31:42,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:31:42,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:31:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:31:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 21:31:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:31:43,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 21:31:44,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:44,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:44,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:44,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:31:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:31:44,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:31:45,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:31:45,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 56 [2022-07-19 21:31:45,841 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:31:45,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3222 treesize of output 3101 [2022-07-19 21:31:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:31:45,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1547 treesize of output 1163 [2022-07-19 21:31:45,882 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:45,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2710 treesize of output 2518 [2022-07-19 21:31:45,902 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:45,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2518 treesize of output 1750 [2022-07-19 21:31:45,921 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:31:45,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1750 treesize of output 1654