./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:04:38,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:04:38,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:04:38,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:04:38,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:04:38,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:04:38,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:04:38,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:04:38,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:04:38,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:04:38,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:04:38,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:04:38,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:04:38,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:04:38,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:04:38,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:04:38,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:04:38,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:04:38,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:04:38,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:04:38,640 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:04:38,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:04:38,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:04:38,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:04:38,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:04:38,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:04:38,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:04:38,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:04:38,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:04:38,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:04:38,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:04:38,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:04:38,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:04:38,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:04:38,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:04:38,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:04:38,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:04:38,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:04:38,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:04:38,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:04:38,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:04:38,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:04:38,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:04:38,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:04:38,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:04:38,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:04:38,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:04:38,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:04:38,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:04:38,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:04:38,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:04:38,702 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:04:38,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:04:38,703 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:04:38,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:04:38,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:04:38,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:04:38,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:04:38,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:04:38,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:04:38,711 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:04:38,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:04:38,711 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:04:38,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:04:38,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:04:38,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:04:38,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:04:38,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:38,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:04:38,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:04:38,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:04:38,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:04:38,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:04:38,713 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:04:38,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:04:38,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:04:38,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-07-21 09:04:38,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:04:38,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:04:38,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:04:38,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:04:38,972 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:04:38,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-07-21 09:04:39,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5df45027/00c81aadafd74e179073d88ec9344355/FLAG650682456 [2022-07-21 09:04:39,382 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:04:39,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-07-21 09:04:39,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5df45027/00c81aadafd74e179073d88ec9344355/FLAG650682456 [2022-07-21 09:04:39,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5df45027/00c81aadafd74e179073d88ec9344355 [2022-07-21 09:04:39,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:04:39,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:04:39,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:39,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:04:39,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:04:39,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@964359f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39, skipping insertion in model container [2022-07-21 09:04:39,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:04:39,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:04:39,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-07-21 09:04:39,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:39,614 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:04:39,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-07-21 09:04:39,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:39,661 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:04:39,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39 WrapperNode [2022-07-21 09:04:39,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:39,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:39,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:04:39,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:04:39,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,697 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-07-21 09:04:39,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:39,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:04:39,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:04:39,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:04:39,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:04:39,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:04:39,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:04:39,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:04:39,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (1/1) ... [2022-07-21 09:04:39,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:39,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:04:39,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:04:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:04:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:04:39,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:04:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:04:39,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:04:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:04:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:04:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:04:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:04:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:04:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:04:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:04:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:04:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:04:39,860 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:04:39,934 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:04:39,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:04:40,116 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:04:40,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:04:40,165 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:04:40,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:40 BoogieIcfgContainer [2022-07-21 09:04:40,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:04:40,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:04:40,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:04:40,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:04:40,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:04:39" (1/3) ... [2022-07-21 09:04:40,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a847b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:40, skipping insertion in model container [2022-07-21 09:04:40,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:39" (2/3) ... [2022-07-21 09:04:40,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a847b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:40, skipping insertion in model container [2022-07-21 09:04:40,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:40" (3/3) ... [2022-07-21 09:04:40,176 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-07-21 09:04:40,181 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:04:40,188 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:04:40,188 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:04:40,188 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:04:40,258 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:04:40,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-07-21 09:04:40,345 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2022-07-21 09:04:40,348 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:04:40,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-21 09:04:40,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-07-21 09:04:40,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-07-21 09:04:40,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:04:40,371 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@13d271c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cb2c129 [2022-07-21 09:04:40,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:04:40,385 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-07-21 09:04:40,385 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:04:40,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:40,386 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] [2022-07-21 09:04:40,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1289479936, now seen corresponding path program 1 times [2022-07-21 09:04:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022531378] [2022-07-21 09:04:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:40,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:40,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022531378] [2022-07-21 09:04:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022531378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:40,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:40,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:04:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567466536] [2022-07-21 09:04:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:40,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:04:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:04:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:04:40,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-07-21 09:04:40,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:40,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:40,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-07-21 09:04:40,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:40,693 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2022-07-21 09:04:40,696 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-07-21 09:04:40,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 178 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-07-21 09:04:40,699 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-07-21 09:04:40,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-07-21 09:04:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:04:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:04:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-07-21 09:04:40,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-07-21 09:04:40,711 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-07-21 09:04:40,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-07-21 09:04:40,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:40,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-07-21 09:04:40,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:40,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:40,725 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:40,727 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-07-21 09:04:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-07-21 09:04:40,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:04:40,737 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-07-21 09:04:40,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-07-21 09:04:40,742 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-07-21 09:04:40,743 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-07-21 09:04:40,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:40,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:40,744 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] [2022-07-21 09:04:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:04:40,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2022-07-21 09:04:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692480993] [2022-07-21 09:04:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692480993] [2022-07-21 09:04:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692480993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:41,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:41,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:04:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782326936] [2022-07-21 09:04:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:41,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:04:41,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-07-21 09:04:41,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:41,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:41,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-07-21 09:04:41,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:41,162 INFO L129 PetriNetUnfolder]: 44/170 cut-off events. [2022-07-21 09:04:41,162 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:04:41,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 424 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-07-21 09:04:41,165 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-07-21 09:04:41,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-07-21 09:04:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:04:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:04:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-07-21 09:04:41,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-07-21 09:04:41,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-07-21 09:04:41,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-07-21 09:04:41,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:41,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-07-21 09:04:41,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:41,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:41,176 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:41,177 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-07-21 09:04:41,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-07-21 09:04:41,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:04:41,179 INFO L242 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-07-21 09:04:41,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-07-21 09:04:41,180 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-07-21 09:04:41,180 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-07-21 09:04:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:41,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:41,180 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] [2022-07-21 09:04:41,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:04:41,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash 251417684, now seen corresponding path program 1 times [2022-07-21 09:04:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:41,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813453132] [2022-07-21 09:04:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813453132] [2022-07-21 09:04:41,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813453132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496018855] [2022-07-21 09:04:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:41,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:41,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:04:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 09:04:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:42,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:43,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496018855] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:43,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:43,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-07-21 09:04:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672156010] [2022-07-21 09:04:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:04:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:04:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:04:43,408 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:04:43,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:43,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:43,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:04:43,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:44,900 INFO L129 PetriNetUnfolder]: 210/635 cut-off events. [2022-07-21 09:04:44,900 INFO L130 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-07-21 09:04:44,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 635 events. 210/635 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3236 event pairs, 31 based on Foata normal form. 1/589 useless extension candidates. Maximal degree in co-relation 1300. Up to 99 conditions per place. [2022-07-21 09:04:44,905 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 94 selfloop transitions, 55 changer transitions 16/204 dead transitions. [2022-07-21 09:04:44,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 915 flow [2022-07-21 09:04:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:04:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:04:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-07-21 09:04:44,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-07-21 09:04:44,911 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-07-21 09:04:44,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-07-21 09:04:44,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:44,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-07-21 09:04:44,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,933 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,933 INFO L186 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-07-21 09:04:44,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 915 flow [2022-07-21 09:04:44,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:04:44,942 INFO L242 Difference]: Finished difference. Result has 115 places, 125 transitions, 517 flow [2022-07-21 09:04:44,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=517, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2022-07-21 09:04:44,944 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2022-07-21 09:04:44,944 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 517 flow [2022-07-21 09:04:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:44,945 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] [2022-07-21 09:04:44,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:04:45,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:45,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700883, now seen corresponding path program 1 times [2022-07-21 09:04:45,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:45,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476214179] [2022-07-21 09:04:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:45,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:45,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476214179] [2022-07-21 09:04:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476214179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036788117] [2022-07-21 09:04:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:45,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:45,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:04:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:04:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:48,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036788117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:48,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:48,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:04:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915775150] [2022-07-21 09:04:48,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:04:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:04:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:04:48,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:04:48,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 517 flow. Second operand has 37 states, 37 states have (on average 51.13513513513514) internal successors, (1892), 37 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:48,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:48,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:04:48,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:15,449 INFO L129 PetriNetUnfolder]: 680/2204 cut-off events. [2022-07-21 09:05:15,450 INFO L130 PetriNetUnfolder]: For 2952/2952 co-relation queries the response was YES. [2022-07-21 09:05:15,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5964 conditions, 2204 events. 680/2204 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18031 event pairs, 28 based on Foata normal form. 21/2222 useless extension candidates. Maximal degree in co-relation 5948. Up to 229 conditions per place. [2022-07-21 09:05:15,479 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 263 selfloop transitions, 182 changer transitions 210/694 dead transitions. [2022-07-21 09:05:15,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 694 transitions, 4500 flow [2022-07-21 09:05:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-07-21 09:05:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2022-07-21 09:05:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 7007 transitions. [2022-07-21 09:05:15,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.603219696969697 [2022-07-21 09:05:15,527 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 7007 transitions. [2022-07-21 09:05:15,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 7007 transitions. [2022-07-21 09:05:15,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:15,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 7007 transitions. [2022-07-21 09:05:15,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 53.083333333333336) internal successors, (7007), 132 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:15,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:15,562 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:15,563 INFO L186 Difference]: Start difference. First operand has 115 places, 125 transitions, 517 flow. Second operand 132 states and 7007 transitions. [2022-07-21 09:05:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 694 transitions, 4500 flow [2022-07-21 09:05:15,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 694 transitions, 4324 flow, removed 82 selfloop flow, removed 9 redundant places. [2022-07-21 09:05:15,589 INFO L242 Difference]: Finished difference. Result has 321 places, 286 transitions, 2277 flow [2022-07-21 09:05:15,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=2277, PETRI_PLACES=321, PETRI_TRANSITIONS=286} [2022-07-21 09:05:15,590 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 243 predicate places. [2022-07-21 09:05:15,590 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 286 transitions, 2277 flow [2022-07-21 09:05:15,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.13513513513514) internal successors, (1892), 37 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:15,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:15,592 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:15,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:05:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 09:05:15,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:05:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash -492420380, now seen corresponding path program 2 times [2022-07-21 09:05:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:15,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390657929] [2022-07-21 09:05:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:15,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:16,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390657929] [2022-07-21 09:05:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390657929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659457824] [2022-07-21 09:05:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:05:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:16,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:05:16,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:05:16,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:05:16,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:05:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:17,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:20,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659457824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:20,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:20,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 41 [2022-07-21 09:05:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537298054] [2022-07-21 09:05:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 09:05:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 09:05:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 09:05:20,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:05:20,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 286 transitions, 2277 flow. Second operand has 41 states, 41 states have (on average 51.048780487804876) internal successors, (2093), 41 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:20,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:20,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:05:20,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:27,498 INFO L129 PetriNetUnfolder]: 1056/3248 cut-off events. [2022-07-21 09:06:27,498 INFO L130 PetriNetUnfolder]: For 49102/49102 co-relation queries the response was YES. [2022-07-21 09:06:27,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17942 conditions, 3248 events. 1056/3248 cut-off events. For 49102/49102 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 28194 event pairs, 103 based on Foata normal form. 20/3246 useless extension candidates. Maximal degree in co-relation 17842. Up to 594 conditions per place. [2022-07-21 09:06:27,554 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 360 selfloop transitions, 407 changer transitions 126/932 dead transitions. [2022-07-21 09:06:27,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 932 transitions, 11652 flow [2022-07-21 09:06:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-21 09:06:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2022-07-21 09:06:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 7171 transitions. [2022-07-21 09:06:27,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5991811497326203 [2022-07-21 09:06:27,571 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 7171 transitions. [2022-07-21 09:06:27,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 7171 transitions. [2022-07-21 09:06:27,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:27,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 7171 transitions. [2022-07-21 09:06:27,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 52.72794117647059) internal successors, (7171), 136 states have internal predecessors, (7171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 88.0) internal successors, (12056), 137 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,601 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 88.0) internal successors, (12056), 137 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,601 INFO L186 Difference]: Start difference. First operand has 321 places, 286 transitions, 2277 flow. Second operand 136 states and 7171 transitions. [2022-07-21 09:06:27,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 932 transitions, 11652 flow [2022-07-21 09:06:27,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 932 transitions, 8519 flow, removed 1559 selfloop flow, removed 70 redundant places. [2022-07-21 09:06:27,773 INFO L242 Difference]: Finished difference. Result has 401 places, 615 transitions, 6335 flow [2022-07-21 09:06:27,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=6335, PETRI_PLACES=401, PETRI_TRANSITIONS=615} [2022-07-21 09:06:27,776 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 323 predicate places. [2022-07-21 09:06:27,776 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 615 transitions, 6335 flow [2022-07-21 09:06:27,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.048780487804876) internal successors, (2093), 41 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,787 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:27,787 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:27,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:28,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash -959376178, now seen corresponding path program 3 times [2022-07-21 09:06:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191997328] [2022-07-21 09:06:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:29,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191997328] [2022-07-21 09:06:29,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191997328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635535883] [2022-07-21 09:06:29,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:29,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:29,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:06:29,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:06:29,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:29,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:06:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:30,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:34,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635535883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:34,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:34,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-07-21 09:06:34,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066071859] [2022-07-21 09:06:34,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:06:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:06:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:06:34,429 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:06:34,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 615 transitions, 6335 flow. Second operand has 37 states, 37 states have (on average 51.270270270270274) internal successors, (1897), 37 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:34,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:34,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:06:34,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:57,855 INFO L129 PetriNetUnfolder]: 1327/3973 cut-off events. [2022-07-21 09:06:57,855 INFO L130 PetriNetUnfolder]: For 48506/48506 co-relation queries the response was YES. [2022-07-21 09:06:57,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22483 conditions, 3973 events. 1327/3973 cut-off events. For 48506/48506 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35632 event pairs, 122 based on Foata normal form. 13/3962 useless extension candidates. Maximal degree in co-relation 22362. Up to 1045 conditions per place. [2022-07-21 09:06:57,906 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 483 selfloop transitions, 504 changer transitions 78/1104 dead transitions. [2022-07-21 09:06:57,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1104 transitions, 14883 flow [2022-07-21 09:06:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-21 09:06:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-21 09:06:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4778 transitions. [2022-07-21 09:06:57,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032828282828283 [2022-07-21 09:06:57,911 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4778 transitions. [2022-07-21 09:06:57,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4778 transitions. [2022-07-21 09:06:57,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:57,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4778 transitions. [2022-07-21 09:06:57,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 53.08888888888889) internal successors, (4778), 90 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:57,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:57,923 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:57,924 INFO L186 Difference]: Start difference. First operand has 401 places, 615 transitions, 6335 flow. Second operand 90 states and 4778 transitions. [2022-07-21 09:06:57,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1104 transitions, 14883 flow [2022-07-21 09:06:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1104 transitions, 13461 flow, removed 671 selfloop flow, removed 47 redundant places. [2022-07-21 09:06:58,286 INFO L242 Difference]: Finished difference. Result has 458 places, 843 transitions, 10205 flow [2022-07-21 09:06:58,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=10205, PETRI_PLACES=458, PETRI_TRANSITIONS=843} [2022-07-21 09:06:58,288 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 380 predicate places. [2022-07-21 09:06:58,288 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 843 transitions, 10205 flow [2022-07-21 09:06:58,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.270270270270274) internal successors, (1897), 37 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:58,289 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:58,289 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:58,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:06:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:58,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1488959734, now seen corresponding path program 4 times [2022-07-21 09:06:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650453363] [2022-07-21 09:06:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650453363] [2022-07-21 09:06:58,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650453363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:58,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:58,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867652955] [2022-07-21 09:06:58,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:58,556 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-07-21 09:06:58,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 843 transitions, 10205 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:58,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:58,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-07-21 09:06:58,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:59,941 INFO L129 PetriNetUnfolder]: 1768/4454 cut-off events. [2022-07-21 09:06:59,941 INFO L130 PetriNetUnfolder]: For 83825/83825 co-relation queries the response was YES. [2022-07-21 09:06:59,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 4454 events. 1768/4454 cut-off events. For 83825/83825 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37089 event pairs, 25 based on Foata normal form. 58/4501 useless extension candidates. Maximal degree in co-relation 29919. Up to 908 conditions per place. [2022-07-21 09:07:00,058 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 1306 selfloop transitions, 369 changer transitions 0/1727 dead transitions. [2022-07-21 09:07:00,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1727 transitions, 25546 flow [2022-07-21 09:07:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:07:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:07:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-07-21 09:07:00,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-07-21 09:07:00,060 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-07-21 09:07:00,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-07-21 09:07:00,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:00,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-07-21 09:07:00,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:00,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:00,062 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:00,062 INFO L186 Difference]: Start difference. First operand has 458 places, 843 transitions, 10205 flow. Second operand 7 states and 496 transitions. [2022-07-21 09:07:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1727 transitions, 25546 flow [2022-07-21 09:07:00,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1727 transitions, 24543 flow, removed 377 selfloop flow, removed 48 redundant places. [2022-07-21 09:07:00,755 INFO L242 Difference]: Finished difference. Result has 398 places, 1043 transitions, 13362 flow [2022-07-21 09:07:00,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13362, PETRI_PLACES=398, PETRI_TRANSITIONS=1043} [2022-07-21 09:07:00,757 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 320 predicate places. [2022-07-21 09:07:00,757 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1043 transitions, 13362 flow [2022-07-21 09:07:00,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:00,757 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:00,758 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:00,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:07:00,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1155462312, now seen corresponding path program 2 times [2022-07-21 09:07:00,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:00,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541098161] [2022-07-21 09:07:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:00,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:01,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541098161] [2022-07-21 09:07:01,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541098161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:01,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094941904] [2022-07-21 09:07:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:07:01,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:01,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:01,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:07:01,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:01,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 09:07:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:03,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094941904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:03,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:03,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 48 [2022-07-21 09:07:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123869650] [2022-07-21 09:07:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 09:07:03,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 09:07:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 09:07:03,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:07:03,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1043 transitions, 13362 flow. Second operand has 48 states, 48 states have (on average 50.958333333333336) internal successors, (2446), 48 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:03,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:03,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:07:03,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:41,490 INFO L129 PetriNetUnfolder]: 2666/6861 cut-off events. [2022-07-21 09:07:41,490 INFO L130 PetriNetUnfolder]: For 123709/123709 co-relation queries the response was YES. [2022-07-21 09:07:41,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49459 conditions, 6861 events. 2666/6861 cut-off events. For 123709/123709 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 62401 event pairs, 73 based on Foata normal form. 13/6866 useless extension candidates. Maximal degree in co-relation 49341. Up to 1291 conditions per place. [2022-07-21 09:07:41,644 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 628 selfloop transitions, 1182 changer transitions 66/1915 dead transitions. [2022-07-21 09:07:41,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1915 transitions, 30527 flow [2022-07-21 09:07:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-21 09:07:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-07-21 09:07:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6361 transitions. [2022-07-21 09:07:41,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.597389181066867 [2022-07-21 09:07:41,651 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6361 transitions. [2022-07-21 09:07:41,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6361 transitions. [2022-07-21 09:07:41,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:41,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6361 transitions. [2022-07-21 09:07:41,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.570247933884296) internal successors, (6361), 121 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:41,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:41,673 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:41,673 INFO L186 Difference]: Start difference. First operand has 398 places, 1043 transitions, 13362 flow. Second operand 121 states and 6361 transitions. [2022-07-21 09:07:41,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1915 transitions, 30527 flow [2022-07-21 09:07:42,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1915 transitions, 29995 flow, removed 266 selfloop flow, removed 0 redundant places. [2022-07-21 09:07:42,996 INFO L242 Difference]: Finished difference. Result has 563 places, 1534 transitions, 25579 flow [2022-07-21 09:07:42,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=13248, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=25579, PETRI_PLACES=563, PETRI_TRANSITIONS=1534} [2022-07-21 09:07:42,998 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 485 predicate places. [2022-07-21 09:07:42,998 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1534 transitions, 25579 flow [2022-07-21 09:07:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 50.958333333333336) internal successors, (2446), 48 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:42,999 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:43,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:43,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:43,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1450559315, now seen corresponding path program 5 times [2022-07-21 09:07:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:43,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110158498] [2022-07-21 09:07:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:44,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:44,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110158498] [2022-07-21 09:07:44,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110158498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:44,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943809257] [2022-07-21 09:07:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:07:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:44,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:44,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:07:44,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:07:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 09:07:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:45,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943809257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:52,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:52,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 46 [2022-07-21 09:07:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061851348] [2022-07-21 09:07:52,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:07:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:52,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:07:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:07:52,439 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-21 09:07:52,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1534 transitions, 25579 flow. Second operand has 46 states, 46 states have (on average 51.108695652173914) internal successors, (2351), 46 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:52,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:52,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-21 09:07:52,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:09,676 WARN L233 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 192 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 09:08:28,062 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 199 DAG size of output: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 09:08:42,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:09:05,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []