./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-mult-equiv.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:54:13,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:54:13,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:54:13,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:54:13,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:54:13,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:54:13,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:54:13,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:54:13,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:54:13,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:54:13,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:54:13,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:54:13,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:54:13,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:54:13,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:54:13,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:54:13,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:54:13,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:54:13,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:54:13,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:54:13,461 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:54:13,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:54:13,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:54:13,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:54:13,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:54:13,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:54:13,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:54:13,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:54:13,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:54:13,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:54:13,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:54:13,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:54:13,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:54:13,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:54:13,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:54:13,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:54:13,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:54:13,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:54:13,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:54:13,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:54:13,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:54:13,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:54:13,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:54:13,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:54:13,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:54:13,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:54:13,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:54:13,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:54:13,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:54:13,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:54:13,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:54:13,519 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:54:13,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:54:13,520 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:54:13,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:54:13,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:54:13,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:54:13,522 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:54:13,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:54:13,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:54:13,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:54:13,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:54:13,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:54:13,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:54:13,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:54:13,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:54:13,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:54:13,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:54:13,524 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:54:13,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:54:13,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:54:13,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-07-22 21:54:13,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:54:13,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:54:13,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:54:13,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:54:13,813 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:54:13,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-22 21:54:13,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351d83be6/4134528b91ae41be8d750926f13ffc65/FLAGabfe6f1e3 [2022-07-22 21:54:14,292 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:54:14,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-22 21:54:14,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351d83be6/4134528b91ae41be8d750926f13ffc65/FLAGabfe6f1e3 [2022-07-22 21:54:14,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351d83be6/4134528b91ae41be8d750926f13ffc65 [2022-07-22 21:54:14,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:54:14,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:54:14,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:54:14,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:54:14,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:54:14,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4661bf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14, skipping insertion in model container [2022-07-22 21:54:14,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:54:14,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:54:14,880 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-mult-equiv.wvr.c[2591,2604] [2022-07-22 21:54:14,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:54:14,894 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:54:14,914 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-mult-equiv.wvr.c[2591,2604] [2022-07-22 21:54:14,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:54:14,930 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:54:14,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14 WrapperNode [2022-07-22 21:54:14,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:54:14,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:54:14,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:54:14,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:54:14,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,964 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-22 21:54:14,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:54:14,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:54:14,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:54:14,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:54:14,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:14,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:15,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:54:15,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:54:15,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:54:15,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:54:15,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (1/1) ... [2022-07-22 21:54:15,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:54:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:15,041 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) [2022-07-22 21:54:15,065 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 [2022-07-22 21:54:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:54:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:54:15,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:54:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:54:15,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:54:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:54:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:54:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:54:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:54:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:54:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:54:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:54:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:54:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:54:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:54:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:54:15,087 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:54:15,201 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:54:15,216 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:54:15,486 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:54:15,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:54:15,531 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:54:15,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:54:15 BoogieIcfgContainer [2022-07-22 21:54:15,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:54:15,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:54:15,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:54:15,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:54:15,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:54:14" (1/3) ... [2022-07-22 21:54:15,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc4bcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:54:15, skipping insertion in model container [2022-07-22 21:54:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:54:14" (2/3) ... [2022-07-22 21:54:15,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc4bcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:54:15, skipping insertion in model container [2022-07-22 21:54:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:54:15" (3/3) ... [2022-07-22 21:54:15,541 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-07-22 21:54:15,546 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:54:15,554 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:54:15,555 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:54:15,555 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:54:15,610 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:54:15,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-07-22 21:54:15,693 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-22 21:54:15,694 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:54:15,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-07-22 21:54:15,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-07-22 21:54:15,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-07-22 21:54:15,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:54:15,725 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@582bb686, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63d908cc [2022-07-22 21:54:15,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:54:15,762 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-07-22 21:54:15,763 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:54:15,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:15,763 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] [2022-07-22 21:54:15,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1408875064, now seen corresponding path program 1 times [2022-07-22 21:54:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145001873] [2022-07-22 21:54:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:15,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145001873] [2022-07-22 21:54:15,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145001873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:15,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:15,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:54:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701625474] [2022-07-22 21:54:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:15,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:54:15,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:16,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:54:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:54:16,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-07-22 21:54:16,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:16,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-07-22 21:54:16,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:16,087 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-07-22 21:54:16,087 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-07-22 21:54:16,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-07-22 21:54:16,090 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-07-22 21:54:16,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-07-22 21:54:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:54:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:54:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-07-22 21:54:16,103 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-07-22 21:54:16,104 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-07-22 21:54:16,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-07-22 21:54:16,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:16,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-07-22 21:54:16,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,123 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,125 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-07-22 21:54:16,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-07-22 21:54:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:54:16,132 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-07-22 21:54:16,134 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-07-22 21:54:16,137 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-07-22 21:54:16,137 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-07-22 21:54:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,139 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:16,139 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] [2022-07-22 21:54:16,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:54:16,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-07-22 21:54:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163367382] [2022-07-22 21:54:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:16,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:16,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163367382] [2022-07-22 21:54:16,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163367382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:16,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:16,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845005074] [2022-07-22 21:54:16,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:16,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:16,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-07-22 21:54:16,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:16,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-07-22 21:54:16,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:16,492 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-07-22 21:54:16,493 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-22 21:54:16,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 483 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-07-22 21:54:16,495 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-07-22 21:54:16,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-07-22 21:54:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-07-22 21:54:16,500 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-07-22 21:54:16,500 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-07-22 21:54:16,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-07-22 21:54:16,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:16,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-07-22 21:54:16,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,506 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-07-22 21:54:16,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-07-22 21:54:16,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:16,509 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-07-22 21:54:16,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-22 21:54:16,510 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-07-22 21:54:16,510 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-07-22 21:54:16,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:16,511 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] [2022-07-22 21:54:16,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:54:16,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-07-22 21:54:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:16,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858680309] [2022-07-22 21:54:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858680309] [2022-07-22 21:54:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858680309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:16,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:16,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:16,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132162763] [2022-07-22 21:54:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:16,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:16,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:16,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:16,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:16,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:16,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:16,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:17,220 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-07-22 21:54:17,221 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-07-22 21:54:17,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4076 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-07-22 21:54:17,232 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-07-22 21:54:17,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-07-22 21:54:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:54:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:54:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-07-22 21:54:17,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-07-22 21:54:17,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-07-22 21:54:17,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-07-22 21:54:17,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:17,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-07-22 21:54:17,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,243 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,243 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-07-22 21:54:17,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-07-22 21:54:17,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:17,247 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-07-22 21:54:17,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-22 21:54:17,248 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-07-22 21:54:17,248 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-07-22 21:54:17,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:17,249 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] [2022-07-22 21:54:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:54:17,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1580608891, now seen corresponding path program 2 times [2022-07-22 21:54:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:17,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445358418] [2022-07-22 21:54:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:17,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445358418] [2022-07-22 21:54:17,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445358418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:17,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:17,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:17,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426808943] [2022-07-22 21:54:17,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:17,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:17,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:17,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:17,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:17,588 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-07-22 21:54:17,588 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-07-22 21:54:17,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4794 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-07-22 21:54:17,601 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-07-22 21:54:17,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-07-22 21:54:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-07-22 21:54:17,604 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-22 21:54:17,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-07-22 21:54:17,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-07-22 21:54:17,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:17,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-07-22 21:54:17,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,613 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,613 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-07-22 21:54:17,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-07-22 21:54:17,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:54:17,622 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-07-22 21:54:17,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-07-22 21:54:17,628 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-07-22 21:54:17,628 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-07-22 21:54:17,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,630 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:17,630 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] [2022-07-22 21:54:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:54:17,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -599492455, now seen corresponding path program 3 times [2022-07-22 21:54:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:17,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241509272] [2022-07-22 21:54:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241509272] [2022-07-22 21:54:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241509272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:17,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999425348] [2022-07-22 21:54:17,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:17,772 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:17,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:17,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:17,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:17,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:18,180 INFO L129 PetriNetUnfolder]: 576/1349 cut-off events. [2022-07-22 21:54:18,180 INFO L130 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-07-22 21:54:18,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8232 event pairs, 89 based on Foata normal form. 19/1297 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-07-22 21:54:18,196 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-07-22 21:54:18,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-07-22 21:54:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:54:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:54:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-07-22 21:54:18,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-07-22 21:54:18,200 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-07-22 21:54:18,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-07-22 21:54:18,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:18,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-07-22 21:54:18,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,204 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,205 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-07-22 21:54:18,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-07-22 21:54:18,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:18,215 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-07-22 21:54:18,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-07-22 21:54:18,218 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-07-22 21:54:18,219 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-07-22 21:54:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,219 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:18,220 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] [2022-07-22 21:54:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:54:18,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1430121317, now seen corresponding path program 4 times [2022-07-22 21:54:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987559876] [2022-07-22 21:54:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:18,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987559876] [2022-07-22 21:54:18,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987559876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:18,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:18,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648665357] [2022-07-22 21:54:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:18,387 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:18,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:18,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:18,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:18,665 INFO L129 PetriNetUnfolder]: 594/1403 cut-off events. [2022-07-22 21:54:18,665 INFO L130 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-07-22 21:54:18,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8721 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-07-22 21:54:18,681 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-07-22 21:54:18,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-07-22 21:54:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:54:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:54:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-07-22 21:54:18,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-07-22 21:54:18,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-07-22 21:54:18,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-07-22 21:54:18,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:18,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-07-22 21:54:18,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,708 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,709 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-07-22 21:54:18,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-07-22 21:54:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:18,723 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-07-22 21:54:18,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-22 21:54:18,726 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-07-22 21:54:18,726 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-07-22 21:54:18,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,728 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:18,728 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] [2022-07-22 21:54:18,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:54:18,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash -829555728, now seen corresponding path program 1 times [2022-07-22 21:54:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:18,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797115419] [2022-07-22 21:54:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797115419] [2022-07-22 21:54:18,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797115419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:18,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:18,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030694942] [2022-07-22 21:54:18,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:18,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:18,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:18,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:18,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:18,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:19,211 INFO L129 PetriNetUnfolder]: 671/1538 cut-off events. [2022-07-22 21:54:19,211 INFO L130 PetriNetUnfolder]: For 3129/3163 co-relation queries the response was YES. [2022-07-22 21:54:19,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 1538 events. 671/1538 cut-off events. For 3129/3163 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9727 event pairs, 131 based on Foata normal form. 28/1481 useless extension candidates. Maximal degree in co-relation 4684. Up to 579 conditions per place. [2022-07-22 21:54:19,227 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-07-22 21:54:19,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-07-22 21:54:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:54:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:54:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-07-22 21:54:19,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-07-22 21:54:19,230 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-07-22 21:54:19,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-07-22 21:54:19,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:19,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-07-22 21:54:19,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,235 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-07-22 21:54:19,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-07-22 21:54:19,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-22 21:54:19,248 INFO L242 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-07-22 21:54:19,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-07-22 21:54:19,249 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-07-22 21:54:19,249 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-07-22 21:54:19,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:19,250 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] [2022-07-22 21:54:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:54:19,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1761321142, now seen corresponding path program 2 times [2022-07-22 21:54:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:19,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633318699] [2022-07-22 21:54:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:19,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:19,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633318699] [2022-07-22 21:54:19,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633318699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:19,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:19,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:54:19,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326340320] [2022-07-22 21:54:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:54:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:54:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:54:19,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-22 21:54:19,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:19,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-22 21:54:19,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:20,392 INFO L129 PetriNetUnfolder]: 1609/3278 cut-off events. [2022-07-22 21:54:20,392 INFO L130 PetriNetUnfolder]: For 9722/9800 co-relation queries the response was YES. [2022-07-22 21:54:20,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3278 events. 1609/3278 cut-off events. For 9722/9800 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23364 event pairs, 512 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 11470. Up to 1864 conditions per place. [2022-07-22 21:54:20,427 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 114 selfloop transitions, 60 changer transitions 6/235 dead transitions. [2022-07-22 21:54:20,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2127 flow [2022-07-22 21:54:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:54:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:54:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 722 transitions. [2022-07-22 21:54:20,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.827033218785796 [2022-07-22 21:54:20,430 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 722 transitions. [2022-07-22 21:54:20,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 722 transitions. [2022-07-22 21:54:20,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:20,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 722 transitions. [2022-07-22 21:54:20,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.22222222222223) internal successors, (722), 9 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:20,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:20,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:20,435 INFO L186 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 9 states and 722 transitions. [2022-07-22 21:54:20,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2127 flow [2022-07-22 21:54:20,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 235 transitions, 2076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:54:20,521 INFO L242 Difference]: Finished difference. Result has 142 places, 168 transitions, 1575 flow [2022-07-22 21:54:20,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2022-07-22 21:54:20,521 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 56 predicate places. [2022-07-22 21:54:20,522 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1575 flow [2022-07-22 21:54:20,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:20,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:20,522 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] [2022-07-22 21:54:20,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:54:20,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash 133163824, now seen corresponding path program 1 times [2022-07-22 21:54:20,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:20,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358305232] [2022-07-22 21:54:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358305232] [2022-07-22 21:54:20,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358305232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:20,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:20,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151873180] [2022-07-22 21:54:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:20,592 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:54:20,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:20,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:20,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:54:20,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:21,166 INFO L129 PetriNetUnfolder]: 1323/3152 cut-off events. [2022-07-22 21:54:21,166 INFO L130 PetriNetUnfolder]: For 11002/11304 co-relation queries the response was YES. [2022-07-22 21:54:21,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 3152 events. 1323/3152 cut-off events. For 11002/11304 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25036 event pairs, 262 based on Foata normal form. 96/3141 useless extension candidates. Maximal degree in co-relation 11623. Up to 1104 conditions per place. [2022-07-22 21:54:21,210 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 64 selfloop transitions, 65 changer transitions 2/200 dead transitions. [2022-07-22 21:54:21,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 1998 flow [2022-07-22 21:54:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-22 21:54:21,213 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-22 21:54:21,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-22 21:54:21,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-22 21:54:21,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:21,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-22 21:54:21,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,216 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,217 INFO L186 Difference]: Start difference. First operand has 142 places, 168 transitions, 1575 flow. Second operand 6 states and 486 transitions. [2022-07-22 21:54:21,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 1998 flow [2022-07-22 21:54:21,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 1946 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:54:21,271 INFO L242 Difference]: Finished difference. Result has 147 places, 173 transitions, 1774 flow [2022-07-22 21:54:21,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2022-07-22 21:54:21,272 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-07-22 21:54:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1774 flow [2022-07-22 21:54:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:21,273 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] [2022-07-22 21:54:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:54:21,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash -695560766, now seen corresponding path program 2 times [2022-07-22 21:54:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:21,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439637643] [2022-07-22 21:54:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439637643] [2022-07-22 21:54:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439637643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:21,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676388125] [2022-07-22 21:54:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:21,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:54:21,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1774 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:21,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:54:21,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:21,851 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][177], [Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 225#true, 106#true, Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= (+ ~N~0 (* (- 1) ~L~0)) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 150#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 238#true]) [2022-07-22 21:54:21,851 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-22 21:54:21,852 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-22 21:54:21,852 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-22 21:54:21,852 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-22 21:54:22,037 INFO L129 PetriNetUnfolder]: 1649/3706 cut-off events. [2022-07-22 21:54:22,038 INFO L130 PetriNetUnfolder]: For 18241/18640 co-relation queries the response was YES. [2022-07-22 21:54:22,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 3706 events. 1649/3706 cut-off events. For 18241/18640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29394 event pairs, 179 based on Foata normal form. 127/3712 useless extension candidates. Maximal degree in co-relation 15682. Up to 1319 conditions per place. [2022-07-22 21:54:22,104 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 123 selfloop transitions, 105 changer transitions 2/299 dead transitions. [2022-07-22 21:54:22,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 299 transitions, 3896 flow [2022-07-22 21:54:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-07-22 21:54:22,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-07-22 21:54:22,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-07-22 21:54:22,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-07-22 21:54:22,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:22,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-07-22 21:54:22,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,111 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,111 INFO L186 Difference]: Start difference. First operand has 147 places, 173 transitions, 1774 flow. Second operand 6 states and 491 transitions. [2022-07-22 21:54:22,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 299 transitions, 3896 flow [2022-07-22 21:54:22,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 299 transitions, 3726 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:22,269 INFO L242 Difference]: Finished difference. Result has 154 places, 232 transitions, 2918 flow [2022-07-22 21:54:22,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2022-07-22 21:54:22,271 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2022-07-22 21:54:22,271 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2918 flow [2022-07-22 21:54:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:22,272 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] [2022-07-22 21:54:22,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:54:22,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 140530238, now seen corresponding path program 3 times [2022-07-22 21:54:22,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855431525] [2022-07-22 21:54:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:22,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855431525] [2022-07-22 21:54:22,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855431525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:22,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:22,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:22,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048084883] [2022-07-22 21:54:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:22,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:22,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2918 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:22,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:22,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:23,052 INFO L129 PetriNetUnfolder]: 1623/3657 cut-off events. [2022-07-22 21:54:23,053 INFO L130 PetriNetUnfolder]: For 20724/20780 co-relation queries the response was YES. [2022-07-22 21:54:23,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 3657 events. 1623/3657 cut-off events. For 20724/20780 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28431 event pairs, 389 based on Foata normal form. 14/3562 useless extension candidates. Maximal degree in co-relation 16850. Up to 2302 conditions per place. [2022-07-22 21:54:23,106 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 121 selfloop transitions, 71 changer transitions 1/253 dead transitions. [2022-07-22 21:54:23,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3482 flow [2022-07-22 21:54:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:54:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:54:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-07-22 21:54:23,110 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-22 21:54:23,110 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-07-22 21:54:23,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-07-22 21:54:23,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:23,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-07-22 21:54:23,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,114 INFO L186 Difference]: Start difference. First operand has 154 places, 232 transitions, 2918 flow. Second operand 5 states and 405 transitions. [2022-07-22 21:54:23,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3482 flow [2022-07-22 21:54:23,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 3448 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:23,208 INFO L242 Difference]: Finished difference. Result has 160 places, 235 transitions, 3178 flow [2022-07-22 21:54:23,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3178, PETRI_PLACES=160, PETRI_TRANSITIONS=235} [2022-07-22 21:54:23,210 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2022-07-22 21:54:23,210 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 235 transitions, 3178 flow [2022-07-22 21:54:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:23,211 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] [2022-07-22 21:54:23,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:54:23,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 540547268, now seen corresponding path program 3 times [2022-07-22 21:54:23,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327294963] [2022-07-22 21:54:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:23,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327294963] [2022-07-22 21:54:23,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327294963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:23,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:23,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:23,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432759585] [2022-07-22 21:54:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:23,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:23,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:54:23,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 235 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:23,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:54:23,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:23,813 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][179], [Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 260#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 257#(and (= (+ ~N~0 (* (- 1) ~L~0)) 0) (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), 106#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= (+ ~N~0 (* (- 1) ~L~0)) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), 264#true, Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 150#true, 254#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 240#(or (and (= (* (- 1) thread2Thread1of1ForFork1_~cond~1) 0) (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (and (= (+ (* (- 1) thread2Thread1of1ForFork1_~cond~1) 1) 0) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))))), 238#true, Black: 244#(and (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 242#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 246#(and (= thread1Thread1of1ForFork0_~cond~0 1) (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1))]) [2022-07-22 21:54:23,813 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-22 21:54:23,813 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-22 21:54:23,813 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-22 21:54:23,814 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-22 21:54:24,094 INFO L129 PetriNetUnfolder]: 1860/4309 cut-off events. [2022-07-22 21:54:24,094 INFO L130 PetriNetUnfolder]: For 24798/25309 co-relation queries the response was YES. [2022-07-22 21:54:24,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 4309 events. 1860/4309 cut-off events. For 24798/25309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36049 event pairs, 229 based on Foata normal form. 143/4307 useless extension candidates. Maximal degree in co-relation 19581. Up to 1429 conditions per place. [2022-07-22 21:54:24,159 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 131 changer transitions 3/298 dead transitions. [2022-07-22 21:54:24,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 4405 flow [2022-07-22 21:54:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:54:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:54:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2022-07-22 21:54:24,162 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2022-07-22 21:54:24,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2022-07-22 21:54:24,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2022-07-22 21:54:24,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:24,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2022-07-22 21:54:24,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,165 INFO L186 Difference]: Start difference. First operand has 160 places, 235 transitions, 3178 flow. Second operand 5 states and 414 transitions. [2022-07-22 21:54:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 4405 flow [2022-07-22 21:54:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 298 transitions, 4325 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:24,273 INFO L242 Difference]: Finished difference. Result has 166 places, 266 transitions, 4115 flow [2022-07-22 21:54:24,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4115, PETRI_PLACES=166, PETRI_TRANSITIONS=266} [2022-07-22 21:54:24,274 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2022-07-22 21:54:24,274 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 266 transitions, 4115 flow [2022-07-22 21:54:24,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:24,275 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] [2022-07-22 21:54:24,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:54:24,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -346743856, now seen corresponding path program 4 times [2022-07-22 21:54:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:24,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647090381] [2022-07-22 21:54:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:24,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:24,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647090381] [2022-07-22 21:54:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647090381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:24,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:24,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389482578] [2022-07-22 21:54:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:24,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:24,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:54:24,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 266 transitions, 4115 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:24,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:54:24,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:25,243 INFO L129 PetriNetUnfolder]: 1950/4789 cut-off events. [2022-07-22 21:54:25,243 INFO L130 PetriNetUnfolder]: For 35999/36593 co-relation queries the response was YES. [2022-07-22 21:54:25,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 4789 events. 1950/4789 cut-off events. For 35999/36593 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42268 event pairs, 237 based on Foata normal form. 151/4795 useless extension candidates. Maximal degree in co-relation 22859. Up to 1635 conditions per place. [2022-07-22 21:54:25,318 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 84 selfloop transitions, 167 changer transitions 9/329 dead transitions. [2022-07-22 21:54:25,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 5409 flow [2022-07-22 21:54:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2022-07-22 21:54:25,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505154639175257 [2022-07-22 21:54:25,320 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2022-07-22 21:54:25,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2022-07-22 21:54:25,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:25,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2022-07-22 21:54:25,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:25,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:25,323 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:25,323 INFO L186 Difference]: Start difference. First operand has 166 places, 266 transitions, 4115 flow. Second operand 6 states and 495 transitions. [2022-07-22 21:54:25,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 5409 flow [2022-07-22 21:54:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 5381 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:25,481 INFO L242 Difference]: Finished difference. Result has 174 places, 286 transitions, 4936 flow [2022-07-22 21:54:25,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4936, PETRI_PLACES=174, PETRI_TRANSITIONS=286} [2022-07-22 21:54:25,482 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-07-22 21:54:25,482 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 286 transitions, 4936 flow [2022-07-22 21:54:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:25,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:25,483 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] [2022-07-22 21:54:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:54:25,483 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 1 more)] === [2022-07-22 21:54:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1395758734, now seen corresponding path program 5 times [2022-07-22 21:54:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012427294] [2022-07-22 21:54:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012427294] [2022-07-22 21:54:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012427294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670319205] [2022-07-22 21:54:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:54:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:25,635 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) [2022-07-22 21:54:25,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:54:25,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:54:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:54:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:26,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:26,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670319205] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:26,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:54:26,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-22 21:54:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898941873] [2022-07-22 21:54:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:26,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:26,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:54:26,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-22 21:54:26,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 286 transitions, 4936 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:26,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:26,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-22 21:54:26,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:28,018 INFO L129 PetriNetUnfolder]: 3895/9307 cut-off events. [2022-07-22 21:54:28,019 INFO L130 PetriNetUnfolder]: For 81067/81102 co-relation queries the response was YES. [2022-07-22 21:54:28,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 9307 events. 3895/9307 cut-off events. For 81067/81102 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 89826 event pairs, 453 based on Foata normal form. 34/9161 useless extension candidates. Maximal degree in co-relation 45957. Up to 1710 conditions per place. [2022-07-22 21:54:28,143 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 388 selfloop transitions, 167 changer transitions 4/614 dead transitions. [2022-07-22 21:54:28,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 614 transitions, 11347 flow [2022-07-22 21:54:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:54:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:54:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-07-22 21:54:28,146 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-07-22 21:54:28,146 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-07-22 21:54:28,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-07-22 21:54:28,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:28,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-07-22 21:54:28,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,149 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,150 INFO L186 Difference]: Start difference. First operand has 174 places, 286 transitions, 4936 flow. Second operand 7 states and 573 transitions. [2022-07-22 21:54:28,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 614 transitions, 11347 flow [2022-07-22 21:54:28,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 614 transitions, 11207 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:28,397 INFO L242 Difference]: Finished difference. Result has 185 places, 413 transitions, 7730 flow [2022-07-22 21:54:28,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7730, PETRI_PLACES=185, PETRI_TRANSITIONS=413} [2022-07-22 21:54:28,398 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 99 predicate places. [2022-07-22 21:54:28,398 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 413 transitions, 7730 flow [2022-07-22 21:54:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:28,399 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] [2022-07-22 21:54:28,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:54:28,604 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 1 more)] === [2022-07-22 21:54:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 559220224, now seen corresponding path program 6 times [2022-07-22 21:54:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:28,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730130253] [2022-07-22 21:54:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730130253] [2022-07-22 21:54:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730130253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022842743] [2022-07-22 21:54:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:54:28,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:28,760 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) [2022-07-22 21:54:28,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:54:28,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:54:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:54:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:29,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022842743] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:29,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:54:29,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-22 21:54:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365971227] [2022-07-22 21:54:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:54:29,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-22 21:54:29,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 413 transitions, 7730 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:29,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:29,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-22 21:54:29,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:31,064 INFO L129 PetriNetUnfolder]: 4074/9522 cut-off events. [2022-07-22 21:54:31,065 INFO L130 PetriNetUnfolder]: For 106901/106901 co-relation queries the response was YES. [2022-07-22 21:54:31,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54464 conditions, 9522 events. 4074/9522 cut-off events. For 106901/106901 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 91322 event pairs, 499 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 54408. Up to 2947 conditions per place. [2022-07-22 21:54:31,196 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 219 changer transitions 4/574 dead transitions. [2022-07-22 21:54:31,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 574 transitions, 11140 flow [2022-07-22 21:54:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:54:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:54:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-07-22 21:54:31,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-07-22 21:54:31,199 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-07-22 21:54:31,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-07-22 21:54:31,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:31,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-07-22 21:54:31,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,203 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,203 INFO L186 Difference]: Start difference. First operand has 185 places, 413 transitions, 7730 flow. Second operand 7 states and 570 transitions. [2022-07-22 21:54:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 574 transitions, 11140 flow [2022-07-22 21:54:31,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 574 transitions, 11033 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-07-22 21:54:31,582 INFO L242 Difference]: Finished difference. Result has 196 places, 449 transitions, 9123 flow [2022-07-22 21:54:31,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9123, PETRI_PLACES=196, PETRI_TRANSITIONS=449} [2022-07-22 21:54:31,583 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-07-22 21:54:31,583 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 449 transitions, 9123 flow [2022-07-22 21:54:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:31,584 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] [2022-07-22 21:54:31,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:31,801 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,SelfDestructingSolverStorable14 [2022-07-22 21:54:31,801 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 1 more)] === [2022-07-22 21:54:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 656605838, now seen corresponding path program 7 times [2022-07-22 21:54:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:31,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981519697] [2022-07-22 21:54:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:31,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981519697] [2022-07-22 21:54:31,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981519697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:31,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:31,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:54:31,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730728214] [2022-07-22 21:54:31,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:31,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:54:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:54:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:54:31,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:54:31,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 449 transitions, 9123 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:31,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:54:31,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:33,846 INFO L129 PetriNetUnfolder]: 3464/8894 cut-off events. [2022-07-22 21:54:33,847 INFO L130 PetriNetUnfolder]: For 135480/136714 co-relation queries the response was YES. [2022-07-22 21:54:33,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55488 conditions, 8894 events. 3464/8894 cut-off events. For 135480/136714 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 89611 event pairs, 465 based on Foata normal form. 311/8947 useless extension candidates. Maximal degree in co-relation 55427. Up to 1740 conditions per place. [2022-07-22 21:54:33,954 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 150 selfloop transitions, 370 changer transitions 3/609 dead transitions. [2022-07-22 21:54:33,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 609 transitions, 13216 flow [2022-07-22 21:54:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2022-07-22 21:54:33,956 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625429553264605 [2022-07-22 21:54:33,956 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2022-07-22 21:54:33,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2022-07-22 21:54:33,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:33,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2022-07-22 21:54:33,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:33,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:33,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:33,959 INFO L186 Difference]: Start difference. First operand has 196 places, 449 transitions, 9123 flow. Second operand 6 states and 502 transitions. [2022-07-22 21:54:33,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 609 transitions, 13216 flow [2022-07-22 21:54:34,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 609 transitions, 13148 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:34,273 INFO L242 Difference]: Finished difference. Result has 205 places, 548 transitions, 12794 flow [2022-07-22 21:54:34,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12794, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2022-07-22 21:54:34,274 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 119 predicate places. [2022-07-22 21:54:34,274 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 12794 flow [2022-07-22 21:54:34,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:34,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:34,275 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] [2022-07-22 21:54:34,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:54:34,275 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 1 more)] === [2022-07-22 21:54:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1072745922, now seen corresponding path program 4 times [2022-07-22 21:54:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525097859] [2022-07-22 21:54:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:34,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525097859] [2022-07-22 21:54:34,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525097859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:34,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:34,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343366442] [2022-07-22 21:54:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:34,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:34,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 12794 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:34,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:34,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:34,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:36,319 INFO L129 PetriNetUnfolder]: 3909/9528 cut-off events. [2022-07-22 21:54:36,319 INFO L130 PetriNetUnfolder]: For 170244/170512 co-relation queries the response was YES. [2022-07-22 21:54:36,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63320 conditions, 9528 events. 3909/9528 cut-off events. For 170244/170512 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93113 event pairs, 976 based on Foata normal form. 37/9292 useless extension candidates. Maximal degree in co-relation 63254. Up to 5688 conditions per place. [2022-07-22 21:54:36,458 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 436 selfloop transitions, 66 changer transitions 8/584 dead transitions. [2022-07-22 21:54:36,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 584 transitions, 14251 flow [2022-07-22 21:54:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-07-22 21:54:36,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-22 21:54:36,460 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-07-22 21:54:36,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-07-22 21:54:36,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:36,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-07-22 21:54:36,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,464 INFO L186 Difference]: Start difference. First operand has 205 places, 548 transitions, 12794 flow. Second operand 6 states and 476 transitions. [2022-07-22 21:54:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 584 transitions, 14251 flow [2022-07-22 21:54:36,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 584 transitions, 14215 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-22 21:54:36,958 INFO L242 Difference]: Finished difference. Result has 212 places, 541 transitions, 12699 flow [2022-07-22 21:54:36,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12418, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12699, PETRI_PLACES=212, PETRI_TRANSITIONS=541} [2022-07-22 21:54:36,959 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 126 predicate places. [2022-07-22 21:54:36,959 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 541 transitions, 12699 flow [2022-07-22 21:54:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:36,959 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] [2022-07-22 21:54:36,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:54:36,960 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1416644298, now seen corresponding path program 8 times [2022-07-22 21:54:36,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927598938] [2022-07-22 21:54:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927598938] [2022-07-22 21:54:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927598938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174572358] [2022-07-22 21:54:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:54:37,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:37,068 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) [2022-07-22 21:54:37,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:54:37,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:54:37,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 21:54:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:37,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:37,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174572358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:37,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:37,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-07-22 21:54:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646757029] [2022-07-22 21:54:37,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:37,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:54:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:54:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:54:37,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-22 21:54:37,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 541 transitions, 12699 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:37,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:37,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-22 21:54:37,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:42,751 INFO L129 PetriNetUnfolder]: 7811/19000 cut-off events. [2022-07-22 21:54:42,752 INFO L130 PetriNetUnfolder]: For 303313/304046 co-relation queries the response was YES. [2022-07-22 21:54:43,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118832 conditions, 19000 events. 7811/19000 cut-off events. For 303313/304046 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 210815 event pairs, 1006 based on Foata normal form. 473/19077 useless extension candidates. Maximal degree in co-relation 118762. Up to 4772 conditions per place. [2022-07-22 21:54:43,211 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 783 selfloop transitions, 280 changer transitions 21/1170 dead transitions. [2022-07-22 21:54:43,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1170 transitions, 28289 flow [2022-07-22 21:54:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:54:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:54:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2022-07-22 21:54:43,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2022-07-22 21:54:43,214 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2022-07-22 21:54:43,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2022-07-22 21:54:43,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:43,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2022-07-22 21:54:43,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:43,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:43,219 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:43,220 INFO L186 Difference]: Start difference. First operand has 212 places, 541 transitions, 12699 flow. Second operand 15 states and 1097 transitions. [2022-07-22 21:54:43,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1170 transitions, 28289 flow [2022-07-22 21:54:44,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1170 transitions, 28213 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-22 21:54:44,087 INFO L242 Difference]: Finished difference. Result has 236 places, 711 transitions, 17313 flow [2022-07-22 21:54:44,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17313, PETRI_PLACES=236, PETRI_TRANSITIONS=711} [2022-07-22 21:54:44,088 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-22 21:54:44,088 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 711 transitions, 17313 flow [2022-07-22 21:54:44,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:44,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:44,089 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] [2022-07-22 21:54:44,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:44,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:54:44,310 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 846898254, now seen corresponding path program 9 times [2022-07-22 21:54:44,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078691055] [2022-07-22 21:54:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:44,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078691055] [2022-07-22 21:54:44,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078691055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:44,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:44,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:44,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391993034] [2022-07-22 21:54:44,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:44,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:44,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:44,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:44,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 711 transitions, 17313 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:44,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:44,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:44,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:49,306 INFO L129 PetriNetUnfolder]: 7695/18660 cut-off events. [2022-07-22 21:54:49,306 INFO L130 PetriNetUnfolder]: For 363847/364686 co-relation queries the response was YES. [2022-07-22 21:54:49,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129115 conditions, 18660 events. 7695/18660 cut-off events. For 363847/364686 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206916 event pairs, 2046 based on Foata normal form. 194/18371 useless extension candidates. Maximal degree in co-relation 129034. Up to 11820 conditions per place. [2022-07-22 21:54:49,580 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 566 selfloop transitions, 73 changer transitions 9/740 dead transitions. [2022-07-22 21:54:49,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 740 transitions, 18968 flow [2022-07-22 21:54:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2022-07-22 21:54:49,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161512027491409 [2022-07-22 21:54:49,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2022-07-22 21:54:49,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2022-07-22 21:54:49,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:49,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2022-07-22 21:54:49,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:49,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:49,584 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:49,584 INFO L186 Difference]: Start difference. First operand has 236 places, 711 transitions, 17313 flow. Second operand 6 states and 475 transitions. [2022-07-22 21:54:49,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 740 transitions, 18968 flow [2022-07-22 21:54:50,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 740 transitions, 18783 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-07-22 21:54:50,704 INFO L242 Difference]: Finished difference. Result has 237 places, 715 transitions, 17401 flow [2022-07-22 21:54:50,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17401, PETRI_PLACES=237, PETRI_TRANSITIONS=715} [2022-07-22 21:54:50,705 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-22 21:54:50,705 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 715 transitions, 17401 flow [2022-07-22 21:54:50,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:50,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:50,705 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] [2022-07-22 21:54:50,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:54:50,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash 570332790, now seen corresponding path program 10 times [2022-07-22 21:54:50,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:50,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244820969] [2022-07-22 21:54:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:50,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244820969] [2022-07-22 21:54:50,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244820969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:50,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:54:50,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:54:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018547038] [2022-07-22 21:54:50,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:54:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:54:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:54:50,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-22 21:54:50,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 715 transitions, 17401 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:50,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:50,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-22 21:54:50,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:55,718 INFO L129 PetriNetUnfolder]: 7839/18997 cut-off events. [2022-07-22 21:54:55,718 INFO L130 PetriNetUnfolder]: For 377260/378069 co-relation queries the response was YES. [2022-07-22 21:54:55,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132423 conditions, 18997 events. 7839/18997 cut-off events. For 377260/378069 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 211246 event pairs, 2077 based on Foata normal form. 194/18715 useless extension candidates. Maximal degree in co-relation 132341. Up to 11793 conditions per place. [2022-07-22 21:54:55,995 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 627 selfloop transitions, 87 changer transitions 15/819 dead transitions. [2022-07-22 21:54:55,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 819 transitions, 21055 flow [2022-07-22 21:54:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:54:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:54:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-22 21:54:55,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-22 21:54:55,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-22 21:54:55,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-22 21:54:55,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:55,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-22 21:54:55,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:55,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:55,998 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:55,998 INFO L186 Difference]: Start difference. First operand has 237 places, 715 transitions, 17401 flow. Second operand 6 states and 486 transitions. [2022-07-22 21:54:55,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 819 transitions, 21055 flow [2022-07-22 21:54:57,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 819 transitions, 20722 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-07-22 21:54:57,141 INFO L242 Difference]: Finished difference. Result has 236 places, 713 transitions, 17288 flow [2022-07-22 21:54:57,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16673, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17288, PETRI_PLACES=236, PETRI_TRANSITIONS=713} [2022-07-22 21:54:57,142 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-22 21:54:57,142 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 713 transitions, 17288 flow [2022-07-22 21:54:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:57,142 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:57,142 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] [2022-07-22 21:54:57,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:54:57,143 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:54:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash -742089420, now seen corresponding path program 1 times [2022-07-22 21:54:57,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97173899] [2022-07-22 21:54:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97173899] [2022-07-22 21:54:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97173899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281694921] [2022-07-22 21:54:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:57,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:57,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:57,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:54:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:54:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:57,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:58,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281694921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:58,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:58,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-22 21:54:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675925654] [2022-07-22 21:54:58,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:54:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:54:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:54:58,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-22 21:54:58,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 713 transitions, 17288 flow. Second operand has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:58,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:58,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-22 21:54:58,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:03,929 INFO L129 PetriNetUnfolder]: 7813/20810 cut-off events. [2022-07-22 21:55:03,929 INFO L130 PetriNetUnfolder]: For 398497/399514 co-relation queries the response was YES. [2022-07-22 21:55:04,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143211 conditions, 20810 events. 7813/20810 cut-off events. For 398497/399514 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 245359 event pairs, 537 based on Foata normal form. 329/20709 useless extension candidates. Maximal degree in co-relation 143130. Up to 8484 conditions per place. [2022-07-22 21:55:04,277 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 601 selfloop transitions, 432 changer transitions 9/1149 dead transitions. [2022-07-22 21:55:04,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1149 transitions, 29299 flow [2022-07-22 21:55:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:55:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:55:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 930 transitions. [2022-07-22 21:55:04,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7375099127676448 [2022-07-22 21:55:04,279 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 930 transitions. [2022-07-22 21:55:04,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 930 transitions. [2022-07-22 21:55:04,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:04,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 930 transitions. [2022-07-22 21:55:04,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.53846153846153) internal successors, (930), 13 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:04,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:04,282 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:04,282 INFO L186 Difference]: Start difference. First operand has 236 places, 713 transitions, 17288 flow. Second operand 13 states and 930 transitions. [2022-07-22 21:55:04,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1149 transitions, 29299 flow [2022-07-22 21:55:05,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1149 transitions, 28875 flow, removed 19 selfloop flow, removed 13 redundant places. [2022-07-22 21:55:05,707 INFO L242 Difference]: Finished difference. Result has 238 places, 925 transitions, 22584 flow [2022-07-22 21:55:05,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16872, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22584, PETRI_PLACES=238, PETRI_TRANSITIONS=925} [2022-07-22 21:55:05,708 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 152 predicate places. [2022-07-22 21:55:05,708 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 925 transitions, 22584 flow [2022-07-22 21:55:05,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:05,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:05,709 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] [2022-07-22 21:55:05,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:55:05,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:05,923 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2137589634, now seen corresponding path program 2 times [2022-07-22 21:55:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:05,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377093157] [2022-07-22 21:55:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:06,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:06,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377093157] [2022-07-22 21:55:06,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377093157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:06,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34225498] [2022-07-22 21:55:06,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:06,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:06,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:55:06,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:06,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:55:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:07,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34225498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:07,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:07,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-22 21:55:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625848191] [2022-07-22 21:55:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:07,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:55:07,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:55:07,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:55:07,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-22 21:55:07,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 925 transitions, 22584 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:07,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:07,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-22 21:55:07,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:14,498 INFO L129 PetriNetUnfolder]: 10225/25815 cut-off events. [2022-07-22 21:55:14,498 INFO L130 PetriNetUnfolder]: For 543747/544246 co-relation queries the response was YES. [2022-07-22 21:55:14,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190583 conditions, 25815 events. 10225/25815 cut-off events. For 543747/544246 co-relation queries the response was YES. Maximal size of possible extension queue 2134. Compared 305858 event pairs, 1596 based on Foata normal form. 54/25298 useless extension candidates. Maximal degree in co-relation 190504. Up to 14574 conditions per place. [2022-07-22 21:55:15,166 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 770 selfloop transitions, 409 changer transitions 8/1259 dead transitions. [2022-07-22 21:55:15,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1259 transitions, 32949 flow [2022-07-22 21:55:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:55:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:55:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 895 transitions. [2022-07-22 21:55:15,168 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7097541633624108 [2022-07-22 21:55:15,168 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 895 transitions. [2022-07-22 21:55:15,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 895 transitions. [2022-07-22 21:55:15,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:15,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 895 transitions. [2022-07-22 21:55:15,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.84615384615384) internal successors, (895), 13 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:15,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:15,172 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:15,172 INFO L186 Difference]: Start difference. First operand has 238 places, 925 transitions, 22584 flow. Second operand 13 states and 895 transitions. [2022-07-22 21:55:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1259 transitions, 32949 flow [2022-07-22 21:55:17,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1259 transitions, 32388 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:17,532 INFO L242 Difference]: Finished difference. Result has 248 places, 1092 transitions, 27863 flow [2022-07-22 21:55:17,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22085, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=27863, PETRI_PLACES=248, PETRI_TRANSITIONS=1092} [2022-07-22 21:55:17,534 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 162 predicate places. [2022-07-22 21:55:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 1092 transitions, 27863 flow [2022-07-22 21:55:17,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:17,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:17,535 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] [2022-07-22 21:55:17,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 21:55:17,759 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1046393998, now seen corresponding path program 3 times [2022-07-22 21:55:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794230728] [2022-07-22 21:55:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:18,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794230728] [2022-07-22 21:55:18,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794230728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:18,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265334855] [2022-07-22 21:55:18,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:18,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:55:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:55:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:55:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:18,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:21,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265334855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:21,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:21,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-22 21:55:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479977968] [2022-07-22 21:55:21,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:21,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:55:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:55:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=204, Unknown=1, NotChecked=0, Total=272 [2022-07-22 21:55:21,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-22 21:55:21,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 1092 transitions, 27863 flow. Second operand has 17 states, 17 states have (on average 67.11764705882354) internal successors, (1141), 17 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:21,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:21,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-22 21:55:21,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:28,629 INFO L129 PetriNetUnfolder]: 9632/25434 cut-off events. [2022-07-22 21:55:28,629 INFO L130 PetriNetUnfolder]: For 544129/545570 co-relation queries the response was YES. [2022-07-22 21:55:29,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186565 conditions, 25434 events. 9632/25434 cut-off events. For 544129/545570 co-relation queries the response was YES. Maximal size of possible extension queue 2144. Compared 308473 event pairs, 1232 based on Foata normal form. 339/25076 useless extension candidates. Maximal degree in co-relation 186483. Up to 13053 conditions per place. [2022-07-22 21:55:29,148 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 721 selfloop transitions, 425 changer transitions 4/1256 dead transitions. [2022-07-22 21:55:29,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1256 transitions, 33729 flow [2022-07-22 21:55:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 707 transitions. [2022-07-22 21:55:29,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7288659793814433 [2022-07-22 21:55:29,150 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 707 transitions. [2022-07-22 21:55:29,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 707 transitions. [2022-07-22 21:55:29,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:29,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 707 transitions. [2022-07-22 21:55:29,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.7) internal successors, (707), 10 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,153 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,153 INFO L186 Difference]: Start difference. First operand has 248 places, 1092 transitions, 27863 flow. Second operand 10 states and 707 transitions. [2022-07-22 21:55:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1256 transitions, 33729 flow [2022-07-22 21:55:31,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1256 transitions, 33003 flow, removed 82 selfloop flow, removed 11 redundant places. [2022-07-22 21:55:31,708 INFO L242 Difference]: Finished difference. Result has 245 places, 1179 transitions, 30178 flow [2022-07-22 21:55:31,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=27147, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=30178, PETRI_PLACES=245, PETRI_TRANSITIONS=1179} [2022-07-22 21:55:31,710 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 159 predicate places. [2022-07-22 21:55:31,710 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 1179 transitions, 30178 flow [2022-07-22 21:55:31,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.11764705882354) internal successors, (1141), 17 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:31,711 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] [2022-07-22 21:55:31,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:31,927 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1131792010, now seen corresponding path program 1 times [2022-07-22 21:55:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940278299] [2022-07-22 21:55:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940278299] [2022-07-22 21:55:32,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940278299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102744137] [2022-07-22 21:55:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:32,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:32,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:32,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:55:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:55:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:32,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:32,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102744137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:32,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:32,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 16 [2022-07-22 21:55:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661538967] [2022-07-22 21:55:32,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:32,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:55:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:55:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:55:32,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-22 21:55:32,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 1179 transitions, 30178 flow. Second operand has 16 states, 16 states have (on average 71.25) internal successors, (1140), 16 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:32,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-22 21:55:32,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand