/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:53:44,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:53:44,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:53:44,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:53:44,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:53:44,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:53:44,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:53:44,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:53:44,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:53:44,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:53:44,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:53:44,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:53:44,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:53:44,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:53:44,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:53:44,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:53:44,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:53:44,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:53:44,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:53:44,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:53:44,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:53:44,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:53:44,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:53:44,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:53:44,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:53:44,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:53:44,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:53:44,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:53:44,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 23:53:44,673 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:53:44,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:53:44,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:53:44,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:53:44,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:53:44,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:53:44,677 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:53:44,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:53:44,677 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:53:44,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:53:44,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:53:44,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:53:44,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:53:44,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:53:44,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:53:44,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:53:44,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:53:44,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:53:44,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:53:44,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:53:44,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:53:44,681 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-27 23:53:44,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:53:44,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:53:44,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:53:44,915 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:53:44,915 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:53:44,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-01-27 23:53:46,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:53:46,202 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:53:46,202 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-01-27 23:53:46,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2834efe48/173d6d5767a74ee2a2095c0c0d954268/FLAG3b2ea2a08 [2023-01-27 23:53:46,225 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2834efe48/173d6d5767a74ee2a2095c0c0d954268 [2023-01-27 23:53:46,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:53:46,229 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:53:46,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:53:46,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:53:46,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:53:46,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b1e5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46, skipping insertion in model container [2023-01-27 23:53:46,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:53:46,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:53:46,486 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2023-01-27 23:53:46,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:53:46,498 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:53:46,530 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2023-01-27 23:53:46,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:53:46,551 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:53:46,551 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:53:46,557 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:53:46,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46 WrapperNode [2023-01-27 23:53:46,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:53:46,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:53:46,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:53:46,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:53:46,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,589 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-01-27 23:53:46,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:53:46,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:53:46,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:53:46,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:53:46,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:53:46,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:53:46,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:53:46,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:53:46,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (1/1) ... [2023-01-27 23:53:46,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:53:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:46,650 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) [2023-01-27 23:53:46,669 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 [2023-01-27 23:53:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 23:53:46,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 23:53:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 23:53:46,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 23:53:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:53:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 23:53:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:53:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:53:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:53:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:53:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 23:53:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:53:46,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:53:46,707 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:53:46,804 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:53:46,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:53:46,932 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:53:46,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:53:46,937 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 23:53:46,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:53:46 BoogieIcfgContainer [2023-01-27 23:53:46,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:53:46,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:53:46,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:53:46,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:53:46,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:53:46" (1/3) ... [2023-01-27 23:53:46,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e04526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:53:46, skipping insertion in model container [2023-01-27 23:53:46,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:46" (2/3) ... [2023-01-27 23:53:46,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e04526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:53:46, skipping insertion in model container [2023-01-27 23:53:46,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:53:46" (3/3) ... [2023-01-27 23:53:46,946 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-01-27 23:53:46,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:53:46,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:53:46,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:53:47,062 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 23:53:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 23:53:47,132 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 23:53:47,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:47,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 23:53:47,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 23:53:47,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:47,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:53:47,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:47,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:47,186 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 23:53:47,186 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:47,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 23:53:47,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-01-27 23:53:48,899 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-01-27 23:53:48,899 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-01-27 23:53:48,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:53:48,924 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=false, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e2a4203, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:53:48,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:53:48,927 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-27 23:53:48,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:48,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:48,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 23:53:48,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:48,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-01-27 23:53:48,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:48,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690923069] [2023-01-27 23:53:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:49,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690923069] [2023-01-27 23:53:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690923069] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:49,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:53:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630585218] [2023-01-27 23:53:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:49,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:53:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:53:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:53:49,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:49,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:49,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:49,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:49,422 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-01-27 23:53:49,422 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:53:49,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-01-27 23:53:49,424 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-01-27 23:53:49,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-01-27 23:53:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:53:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:53:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-01-27 23:53:49,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2023-01-27 23:53:49,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-01-27 23:53:49,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-01-27 23:53:49,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:49,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-01-27 23:53:49,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,473 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,474 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 233 transitions. [2023-01-27 23:53:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-01-27 23:53:49,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 23:53:49,480 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-01-27 23:53:49,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-01-27 23:53:49,487 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-01-27 23:53:49,487 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-01-27 23:53:49,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:49,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:53:49,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:49,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-01-27 23:53:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:49,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910653276] [2023-01-27 23:53:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:49,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:49,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910653276] [2023-01-27 23:53:49,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910653276] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:49,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:49,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:53:49,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506044753] [2023-01-27 23:53:49,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:49,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:53:49,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:53:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:53:49,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:49,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:49,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:49,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:49,780 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-01-27 23:53:49,780 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-01-27 23:53:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-01-27 23:53:49,783 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-01-27 23:53:49,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-01-27 23:53:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:53:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:53:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2023-01-27 23:53:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-01-27 23:53:49,791 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2023-01-27 23:53:49,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2023-01-27 23:53:49,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:49,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2023-01-27 23:53:49,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,799 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,799 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 344 transitions. [2023-01-27 23:53:49,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-01-27 23:53:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:53:49,802 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-01-27 23:53:49,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-01-27 23:53:49,803 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-01-27 23:53:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-01-27 23:53:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:49,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:53:49,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:49,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-01-27 23:53:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482313813] [2023-01-27 23:53:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:49,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:49,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482313813] [2023-01-27 23:53:49,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482313813] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:49,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:49,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:53:49,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565512651] [2023-01-27 23:53:49,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:49,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:53:49,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:53:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:53:49,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:49,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:49,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:49,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:50,094 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-01-27 23:53:50,094 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2023-01-27 23:53:50,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-01-27 23:53:50,096 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-01-27 23:53:50,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-01-27 23:53:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:53:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:53:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2023-01-27 23:53:50,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2023-01-27 23:53:50,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2023-01-27 23:53:50,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2023-01-27 23:53:50,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:50,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2023-01-27 23:53:50,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,103 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,103 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 399 transitions. [2023-01-27 23:53:50,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-01-27 23:53:50,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-27 23:53:50,107 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-01-27 23:53:50,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-01-27 23:53:50,108 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-01-27 23:53:50,111 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-01-27 23:53:50,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:53:50,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:50,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 1 times [2023-01-27 23:53:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:50,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488359319] [2023-01-27 23:53:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:50,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488359319] [2023-01-27 23:53:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488359319] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:50,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:53:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779702741] [2023-01-27 23:53:50,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:53:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:50,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:53:50,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:53:50,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:50,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:50,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:50,364 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-01-27 23:53:50,365 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-01-27 23:53:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 940 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-01-27 23:53:50,370 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-01-27 23:53:50,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-01-27 23:53:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:53:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:53:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-01-27 23:53:50,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576612903225806 [2023-01-27 23:53:50,372 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-01-27 23:53:50,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-01-27 23:53:50,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:50,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-01-27 23:53:50,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,385 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,385 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 454 transitions. [2023-01-27 23:53:50,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-01-27 23:53:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-27 23:53:50,395 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-01-27 23:53:50,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-01-27 23:53:50,397 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-01-27 23:53:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-01-27 23:53:50,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:53:50,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:50,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 2 times [2023-01-27 23:53:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:50,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084677037] [2023-01-27 23:53:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084677037] [2023-01-27 23:53:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084677037] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:50,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:53:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087189571] [2023-01-27 23:53:50,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:53:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:53:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:53:50,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:50,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:50,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:50,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:50,607 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2023-01-27 23:53:50,607 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-01-27 23:53:50,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 926 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-01-27 23:53:50,609 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-01-27 23:53:50,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-01-27 23:53:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:53:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:53:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2023-01-27 23:53:50,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573732718894009 [2023-01-27 23:53:50,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 397 transitions. [2023-01-27 23:53:50,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 397 transitions. [2023-01-27 23:53:50,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:50,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 397 transitions. [2023-01-27 23:53:50,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,615 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,615 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 397 transitions. [2023-01-27 23:53:50,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-01-27 23:53:50,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-27 23:53:50,621 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-01-27 23:53:50,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-01-27 23:53:50,622 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-01-27 23:53:50,622 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-01-27 23:53:50,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:50,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:50,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:50,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:53:50,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:50,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:50,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1494024432, now seen corresponding path program 3 times [2023-01-27 23:53:50,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:50,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430165850] [2023-01-27 23:53:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:50,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:50,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430165850] [2023-01-27 23:53:50,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430165850] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:50,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817993235] [2023-01-27 23:53:50,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:53:50,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:50,729 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) [2023-01-27 23:53:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:53:50,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:53:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 23:53:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:51,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817993235] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:51,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:51,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 23:53:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322039824] [2023-01-27 23:53:51,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:53:51,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:53:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:53:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:51,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:51,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:51,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:51,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:51,392 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2023-01-27 23:53:51,392 INFO L131 PetriNetUnfolder]: For 2187/2187 co-relation queries the response was YES. [2023-01-27 23:53:51,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2187/2187 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1213 event pairs, 10 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-01-27 23:53:51,395 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 36 selfloop transitions, 38 changer transitions 26/100 dead transitions. [2023-01-27 23:53:51,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 992 flow [2023-01-27 23:53:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:53:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:53:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 903 transitions. [2023-01-27 23:53:51,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514112903225806 [2023-01-27 23:53:51,398 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 903 transitions. [2023-01-27 23:53:51,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 903 transitions. [2023-01-27 23:53:51,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:51,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 903 transitions. [2023-01-27 23:53:51,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.4375) internal successors, (903), 16 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:51,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:51,404 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:51,404 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 16 states and 903 transitions. [2023-01-27 23:53:51,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 992 flow [2023-01-27 23:53:51,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 927 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-01-27 23:53:51,412 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 705 flow [2023-01-27 23:53:51,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=705, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-01-27 23:53:51,413 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 49 predicate places. [2023-01-27 23:53:51,413 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 705 flow [2023-01-27 23:53:51,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:51,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:51,413 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:51,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 23:53:51,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:51,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash 976616748, now seen corresponding path program 4 times [2023-01-27 23:53:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609310577] [2023-01-27 23:53:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609310577] [2023-01-27 23:53:51,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609310577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615072404] [2023-01-27 23:53:51,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:53:51,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:51,774 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) [2023-01-27 23:53:51,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 23:53:51,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:53:51,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 23:53:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:51,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615072404] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:52,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:52,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-27 23:53:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836552605] [2023-01-27 23:53:52,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:52,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:53:52,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:53:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:53:52,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:52,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 705 flow. Second operand has 16 states, 16 states have (on average 52.8125) internal successors, (845), 16 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:52,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:52,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:52,362 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2023-01-27 23:53:52,362 INFO L131 PetriNetUnfolder]: For 4314/4314 co-relation queries the response was YES. [2023-01-27 23:53:52,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 463 events. 258/463 cut-off events. For 4314/4314 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1636 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2419. Up to 237 conditions per place. [2023-01-27 23:53:52,366 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-01-27 23:53:52,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 1473 flow [2023-01-27 23:53:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:53:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:53:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 899 transitions. [2023-01-27 23:53:52,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2023-01-27 23:53:52,369 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 899 transitions. [2023-01-27 23:53:52,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 899 transitions. [2023-01-27 23:53:52,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:52,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 899 transitions. [2023-01-27 23:53:52,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.1875) internal successors, (899), 16 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,378 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,378 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 705 flow. Second operand 16 states and 899 transitions. [2023-01-27 23:53:52,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 1473 flow [2023-01-27 23:53:52,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1098 flow, removed 170 selfloop flow, removed 7 redundant places. [2023-01-27 23:53:52,390 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 769 flow [2023-01-27 23:53:52,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=769, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-01-27 23:53:52,391 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-01-27 23:53:52,391 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 769 flow [2023-01-27 23:53:52,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.8125) internal successors, (845), 16 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:52,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:52,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:52,596 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,SelfDestructingSolverStorable6 [2023-01-27 23:53:52,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:52,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash 921314670, now seen corresponding path program 5 times [2023-01-27 23:53:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:52,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138548189] [2023-01-27 23:53:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138548189] [2023-01-27 23:53:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138548189] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994949939] [2023-01-27 23:53:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:53:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:52,723 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) [2023-01-27 23:53:52,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 23:53:52,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 23:53:52,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:52,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 23:53:52,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:52,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994949939] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:52,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:52,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 23:53:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485947921] [2023-01-27 23:53:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:53:52,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:53:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:53:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:52,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 769 flow. Second operand has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:52,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:52,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:52,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:53,407 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2023-01-27 23:53:53,408 INFO L131 PetriNetUnfolder]: For 12085/12085 co-relation queries the response was YES. [2023-01-27 23:53:53,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 755 events. 412/755 cut-off events. For 12085/12085 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3336 event pairs, 44 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3958. Up to 227 conditions per place. [2023-01-27 23:53:53,412 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-01-27 23:53:53,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2087 flow [2023-01-27 23:53:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:53:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:53:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1236 transitions. [2023-01-27 23:53:53,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530791788856305 [2023-01-27 23:53:53,417 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1236 transitions. [2023-01-27 23:53:53,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1236 transitions. [2023-01-27 23:53:53,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:53,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1236 transitions. [2023-01-27 23:53:53,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 56.18181818181818) internal successors, (1236), 22 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:53,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:53,426 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:53,426 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 769 flow. Second operand 22 states and 1236 transitions. [2023-01-27 23:53:53,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2087 flow [2023-01-27 23:53:53,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1966 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-01-27 23:53:53,448 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1476 flow [2023-01-27 23:53:53,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1476, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-01-27 23:53:53,449 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-01-27 23:53:53,449 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1476 flow [2023-01-27 23:53:53,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:53,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:53,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:53,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 23:53:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:53,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:53,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1348517036, now seen corresponding path program 6 times [2023-01-27 23:53:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625432730] [2023-01-27 23:53:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625432730] [2023-01-27 23:53:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625432730] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100952361] [2023-01-27 23:53:53,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:53:53,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:53,759 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) [2023-01-27 23:53:53,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 23:53:53,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 23:53:53,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 23:53:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100952361] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:53,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:53,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 23:53:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266912660] [2023-01-27 23:53:53,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:53,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:53:53,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:53:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:53:53,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:53,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1476 flow. Second operand has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:53,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:53,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:53,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:54,573 INFO L130 PetriNetUnfolder]: 576/1035 cut-off events. [2023-01-27 23:53:54,573 INFO L131 PetriNetUnfolder]: For 32514/32514 co-relation queries the response was YES. [2023-01-27 23:53:54,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 1035 events. 576/1035 cut-off events. For 32514/32514 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4819 event pairs, 20 based on Foata normal form. 32/1067 useless extension candidates. Maximal degree in co-relation 7098. Up to 327 conditions per place. [2023-01-27 23:53:54,582 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 61 selfloop transitions, 128 changer transitions 48/237 dead transitions. [2023-01-27 23:53:54,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 237 transitions, 3592 flow [2023-01-27 23:53:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 23:53:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 23:53:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1517 transitions. [2023-01-27 23:53:54,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531063321385902 [2023-01-27 23:53:54,587 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1517 transitions. [2023-01-27 23:53:54,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1517 transitions. [2023-01-27 23:53:54,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:54,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1517 transitions. [2023-01-27 23:53:54,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.18518518518518) internal successors, (1517), 27 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:54,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:54,596 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:54,596 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1476 flow. Second operand 27 states and 1517 transitions. [2023-01-27 23:53:54,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 237 transitions, 3592 flow [2023-01-27 23:53:54,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 237 transitions, 3297 flow, removed 139 selfloop flow, removed 4 redundant places. [2023-01-27 23:53:54,658 INFO L231 Difference]: Finished difference. Result has 153 places, 150 transitions, 2479 flow [2023-01-27 23:53:54,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2479, PETRI_PLACES=153, PETRI_TRANSITIONS=150} [2023-01-27 23:53:54,659 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-01-27 23:53:54,659 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 150 transitions, 2479 flow [2023-01-27 23:53:54,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:54,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:54,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:54,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 23:53:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:54,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:54,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1293813567, now seen corresponding path program 7 times [2023-01-27 23:53:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563880419] [2023-01-27 23:53:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:55,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563880419] [2023-01-27 23:53:55,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563880419] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405715774] [2023-01-27 23:53:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:53:55,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:55,028 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) [2023-01-27 23:53:55,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 23:53:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:55,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 23:53:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:55,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405715774] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:55,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-27 23:53:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293544670] [2023-01-27 23:53:55,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:55,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 23:53:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 23:53:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-01-27 23:53:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:55,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 150 transitions, 2479 flow. Second operand has 25 states, 25 states have (on average 52.44) internal successors, (1311), 25 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:55,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:55,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:56,236 INFO L130 PetriNetUnfolder]: 808/1435 cut-off events. [2023-01-27 23:53:56,236 INFO L131 PetriNetUnfolder]: For 78546/78546 co-relation queries the response was YES. [2023-01-27 23:53:56,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12997 conditions, 1435 events. 808/1435 cut-off events. For 78546/78546 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6536 event pairs, 26 based on Foata normal form. 40/1475 useless extension candidates. Maximal degree in co-relation 12926. Up to 482 conditions per place. [2023-01-27 23:53:56,252 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 69 selfloop transitions, 183 changer transitions 70/322 dead transitions. [2023-01-27 23:53:56,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 322 transitions, 6716 flow [2023-01-27 23:53:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-27 23:53:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-27 23:53:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2126 transitions. [2023-01-27 23:53:56,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451188455008489 [2023-01-27 23:53:56,259 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2126 transitions. [2023-01-27 23:53:56,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2126 transitions. [2023-01-27 23:53:56,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:56,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2126 transitions. [2023-01-27 23:53:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.94736842105263) internal successors, (2126), 38 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:56,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:56,272 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:56,272 INFO L175 Difference]: Start difference. First operand has 153 places, 150 transitions, 2479 flow. Second operand 38 states and 2126 transitions. [2023-01-27 23:53:56,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 322 transitions, 6716 flow [2023-01-27 23:53:56,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 322 transitions, 5215 flow, removed 725 selfloop flow, removed 10 redundant places. [2023-01-27 23:53:56,406 INFO L231 Difference]: Finished difference. Result has 200 places, 211 transitions, 3680 flow [2023-01-27 23:53:56,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3680, PETRI_PLACES=200, PETRI_TRANSITIONS=211} [2023-01-27 23:53:56,408 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 182 predicate places. [2023-01-27 23:53:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 211 transitions, 3680 flow [2023-01-27 23:53:56,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.44) internal successors, (1311), 25 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:56,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:56,409 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:56,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:56,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 23:53:56,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:56,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 349678668, now seen corresponding path program 8 times [2023-01-27 23:53:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316574628] [2023-01-27 23:53:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316574628] [2023-01-27 23:53:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316574628] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282158261] [2023-01-27 23:53:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:53:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:57,006 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) [2023-01-27 23:53:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 23:53:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:53:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:53:57,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:57,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:57,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282158261] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:57,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:57,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-01-27 23:53:57,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655468614] [2023-01-27 23:53:57,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:57,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 23:53:57,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 23:53:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 23:53:57,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:57,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 211 transitions, 3680 flow. Second operand has 40 states, 40 states have (on average 52.3) internal successors, (2092), 40 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:57,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:57,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:58,860 INFO L130 PetriNetUnfolder]: 928/1675 cut-off events. [2023-01-27 23:53:58,861 INFO L131 PetriNetUnfolder]: For 135869/135869 co-relation queries the response was YES. [2023-01-27 23:53:58,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17193 conditions, 1675 events. 928/1675 cut-off events. For 135869/135869 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7463 event pairs, 271 based on Foata normal form. 80/1755 useless extension candidates. Maximal degree in co-relation 17103. Up to 1177 conditions per place. [2023-01-27 23:53:58,934 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 226 selfloop transitions, 61 changer transitions 75/362 dead transitions. [2023-01-27 23:53:58,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 362 transitions, 8202 flow [2023-01-27 23:53:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 23:53:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 23:53:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2231 transitions. [2023-01-27 23:53:58,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44979838709677417 [2023-01-27 23:53:58,938 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2231 transitions. [2023-01-27 23:53:58,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2231 transitions. [2023-01-27 23:53:58,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:58,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2231 transitions. [2023-01-27 23:53:58,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.775) internal successors, (2231), 40 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:58,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:58,949 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:58,949 INFO L175 Difference]: Start difference. First operand has 200 places, 211 transitions, 3680 flow. Second operand 40 states and 2231 transitions. [2023-01-27 23:53:58,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 362 transitions, 8202 flow [2023-01-27 23:53:59,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 362 transitions, 6960 flow, removed 596 selfloop flow, removed 6 redundant places. [2023-01-27 23:53:59,146 INFO L231 Difference]: Finished difference. Result has 255 places, 241 transitions, 4403 flow [2023-01-27 23:53:59,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4403, PETRI_PLACES=255, PETRI_TRANSITIONS=241} [2023-01-27 23:53:59,146 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2023-01-27 23:53:59,147 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 241 transitions, 4403 flow [2023-01-27 23:53:59,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 52.3) internal successors, (2092), 40 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:59,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:59,148 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:59,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:59,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:59,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:53:59,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:59,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1705541234, now seen corresponding path program 9 times [2023-01-27 23:53:59,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:59,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502057648] [2023-01-27 23:53:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:59,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:59,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502057648] [2023-01-27 23:53:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502057648] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235040058] [2023-01-27 23:53:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:53:59,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:59,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:53:59,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 23:53:59,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-01-27 23:53:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:53:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:53:59,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:54:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:00,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235040058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:54:00,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:54:00,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-01-27 23:54:00,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464631564] [2023-01-27 23:54:00,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:54:00,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 23:54:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 23:54:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 23:54:00,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:54:00,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 241 transitions, 4403 flow. Second operand has 41 states, 41 states have (on average 52.31707317073171) internal successors, (2145), 41 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:00,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:00,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:54:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:01,870 INFO L130 PetriNetUnfolder]: 1208/2235 cut-off events. [2023-01-27 23:54:01,870 INFO L131 PetriNetUnfolder]: For 351814/351814 co-relation queries the response was YES. [2023-01-27 23:54:01,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27010 conditions, 2235 events. 1208/2235 cut-off events. For 351814/351814 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10788 event pairs, 170 based on Foata normal form. 80/2315 useless extension candidates. Maximal degree in co-relation 26897. Up to 878 conditions per place. [2023-01-27 23:54:01,911 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 188 selfloop transitions, 185 changer transitions 87/460 dead transitions. [2023-01-27 23:54:01,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 460 transitions, 10588 flow [2023-01-27 23:54:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-27 23:54:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-27 23:54:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2568 transitions. [2023-01-27 23:54:01,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021037868162694 [2023-01-27 23:54:01,915 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2568 transitions. [2023-01-27 23:54:01,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2568 transitions. [2023-01-27 23:54:01,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:01,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2568 transitions. [2023-01-27 23:54:01,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.82608695652174) internal successors, (2568), 46 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:01,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 124.0) internal successors, (5828), 47 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:01,938 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 124.0) internal successors, (5828), 47 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:01,938 INFO L175 Difference]: Start difference. First operand has 255 places, 241 transitions, 4403 flow. Second operand 46 states and 2568 transitions. [2023-01-27 23:54:01,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 460 transitions, 10588 flow [2023-01-27 23:54:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 460 transitions, 9469 flow, removed 532 selfloop flow, removed 14 redundant places. [2023-01-27 23:54:02,641 INFO L231 Difference]: Finished difference. Result has 306 places, 310 transitions, 6121 flow [2023-01-27 23:54:02,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6121, PETRI_PLACES=306, PETRI_TRANSITIONS=310} [2023-01-27 23:54:02,642 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 288 predicate places. [2023-01-27 23:54:02,642 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 310 transitions, 6121 flow [2023-01-27 23:54:02,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 52.31707317073171) internal successors, (2145), 41 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:02,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:02,643 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:02,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 23:54:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:02,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:54:02,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 473632138, now seen corresponding path program 10 times [2023-01-27 23:54:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:02,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000772574] [2023-01-27 23:54:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:03,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000772574] [2023-01-27 23:54:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000772574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:54:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582841786] [2023-01-27 23:54:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:54:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:03,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:54:03,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 23:54:03,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:54:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:54:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:54:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:54:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:03,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:54:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:03,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582841786] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:54:03,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:54:03,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-01-27 23:54:03,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627906429] [2023-01-27 23:54:03,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:54:03,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 23:54:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 23:54:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 23:54:03,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:54:03,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 310 transitions, 6121 flow. Second operand has 40 states, 40 states have (on average 52.3) internal successors, (2092), 40 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:03,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:03,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:54:03,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:05,568 INFO L130 PetriNetUnfolder]: 1680/3155 cut-off events. [2023-01-27 23:54:05,568 INFO L131 PetriNetUnfolder]: For 824616/824616 co-relation queries the response was YES. [2023-01-27 23:54:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46364 conditions, 3155 events. 1680/3155 cut-off events. For 824616/824616 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17015 event pairs, 56 based on Foata normal form. 80/3235 useless extension candidates. Maximal degree in co-relation 46230. Up to 1318 conditions per place. [2023-01-27 23:54:05,607 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 120 selfloop transitions, 384 changer transitions 105/609 dead transitions. [2023-01-27 23:54:05,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 609 transitions, 16202 flow [2023-01-27 23:54:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-27 23:54:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-27 23:54:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3071 transitions. [2023-01-27 23:54:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45029325513196483 [2023-01-27 23:54:05,618 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3071 transitions. [2023-01-27 23:54:05,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3071 transitions. [2023-01-27 23:54:05,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:05,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3071 transitions. [2023-01-27 23:54:05,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 55.836363636363636) internal successors, (3071), 55 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:05,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 124.0) internal successors, (6944), 56 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:05,638 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 124.0) internal successors, (6944), 56 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:05,638 INFO L175 Difference]: Start difference. First operand has 306 places, 310 transitions, 6121 flow. Second operand 55 states and 3071 transitions. [2023-01-27 23:54:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 609 transitions, 16202 flow [2023-01-27 23:54:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 609 transitions, 14264 flow, removed 928 selfloop flow, removed 14 redundant places. [2023-01-27 23:54:07,203 INFO L231 Difference]: Finished difference. Result has 372 places, 433 transitions, 9593 flow [2023-01-27 23:54:07,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4609, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=9593, PETRI_PLACES=372, PETRI_TRANSITIONS=433} [2023-01-27 23:54:07,204 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 354 predicate places. [2023-01-27 23:54:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 433 transitions, 9593 flow [2023-01-27 23:54:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 52.3) internal successors, (2092), 40 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:07,205 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:07,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 23:54:07,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 23:54:07,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:54:07,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1615342368, now seen corresponding path program 11 times [2023-01-27 23:54:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:07,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473296795] [2023-01-27 23:54:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473296795] [2023-01-27 23:54:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473296795] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:54:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128964128] [2023-01-27 23:54:07,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:54:07,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:07,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:07,692 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:54:07,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 23:54:07,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-01-27 23:54:07,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:54:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:54:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:54:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:07,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:54:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:54:08,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128964128] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:54:08,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:54:08,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-01-27 23:54:08,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938432065] [2023-01-27 23:54:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:54:08,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 23:54:08,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 23:54:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 23:54:08,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:54:08,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 433 transitions, 9593 flow. Second operand has 41 states, 41 states have (on average 52.31707317073171) internal successors, (2145), 41 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:08,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:08,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:54:08,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:11,052 INFO L130 PetriNetUnfolder]: 2144/3975 cut-off events. [2023-01-27 23:54:11,052 INFO L131 PetriNetUnfolder]: For 1634078/1634078 co-relation queries the response was YES. [2023-01-27 23:54:11,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71668 conditions, 3975 events. 2144/3975 cut-off events. For 1634078/1634078 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 22155 event pairs, 32 based on Foata normal form. 84/4059 useless extension candidates. Maximal degree in co-relation 71507. Up to 1674 conditions per place. [2023-01-27 23:54:11,103 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 112 selfloop transitions, 525 changer transitions 133/770 dead transitions. [2023-01-27 23:54:11,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 770 transitions, 24905 flow [2023-01-27 23:54:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-01-27 23:54:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-01-27 23:54:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3912 transitions. [2023-01-27 23:54:11,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45069124423963136 [2023-01-27 23:54:11,108 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3912 transitions. [2023-01-27 23:54:11,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3912 transitions. [2023-01-27 23:54:11,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:11,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3912 transitions. [2023-01-27 23:54:11,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.885714285714286) internal successors, (3912), 70 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:11,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 124.0) internal successors, (8804), 71 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:11,122 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 124.0) internal successors, (8804), 71 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:11,122 INFO L175 Difference]: Start difference. First operand has 372 places, 433 transitions, 9593 flow. Second operand 70 states and 3912 transitions. [2023-01-27 23:54:11,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 770 transitions, 24905 flow [2023-01-27 23:54:13,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 770 transitions, 19336 flow, removed 2687 selfloop flow, removed 19 redundant places. [2023-01-27 23:54:13,771 INFO L231 Difference]: Finished difference. Result has 458 places, 554 transitions, 12941 flow [2023-01-27 23:54:13,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=12941, PETRI_PLACES=458, PETRI_TRANSITIONS=554} [2023-01-27 23:54:13,772 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 440 predicate places. [2023-01-27 23:54:13,772 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 554 transitions, 12941 flow [2023-01-27 23:54:13,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 52.31707317073171) internal successors, (2145), 41 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:13,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:13,773 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:13,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 23:54:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 23:54:13,981 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:54:13,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2048673579, now seen corresponding path program 12 times [2023-01-27 23:54:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340216728] [2023-01-27 23:54:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:14,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:14,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340216728] [2023-01-27 23:54:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340216728] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:54:14,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434353515] [2023-01-27 23:54:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:54:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:14,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:54:14,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 23:54:14,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-01-27 23:54:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:54:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:54:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:54:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:14,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:54:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:15,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434353515] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:54:15,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:54:15,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2023-01-27 23:54:15,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337613581] [2023-01-27 23:54:15,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:54:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 23:54:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 23:54:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2023-01-27 23:54:15,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:54:15,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 554 transitions, 12941 flow. Second operand has 46 states, 46 states have (on average 52.26086956521739) internal successors, (2404), 46 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:15,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:15,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:54:15,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:19,112 INFO L130 PetriNetUnfolder]: 2588/4771 cut-off events. [2023-01-27 23:54:19,113 INFO L131 PetriNetUnfolder]: For 2182803/2182803 co-relation queries the response was YES. [2023-01-27 23:54:19,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97107 conditions, 4771 events. 2588/4771 cut-off events. For 2182803/2182803 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 26360 event pairs, 12 based on Foata normal form. 64/4835 useless extension candidates. Maximal degree in co-relation 96909. Up to 2002 conditions per place. [2023-01-27 23:54:19,179 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 124 selfloop transitions, 634 changer transitions 164/922 dead transitions. [2023-01-27 23:54:19,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 922 transitions, 34734 flow [2023-01-27 23:54:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-27 23:54:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-27 23:54:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4744 transitions. [2023-01-27 23:54:19,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45009487666034154 [2023-01-27 23:54:19,184 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4744 transitions. [2023-01-27 23:54:19,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4744 transitions. [2023-01-27 23:54:19,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:19,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4744 transitions. [2023-01-27 23:54:19,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 55.811764705882354) internal successors, (4744), 85 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:19,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 124.0) internal successors, (10664), 86 states have internal predecessors, (10664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:19,202 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 124.0) internal successors, (10664), 86 states have internal predecessors, (10664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:19,202 INFO L175 Difference]: Start difference. First operand has 458 places, 554 transitions, 12941 flow. Second operand 85 states and 4744 transitions. [2023-01-27 23:54:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 922 transitions, 34734 flow [2023-01-27 23:54:23,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 922 transitions, 26791 flow, removed 3777 selfloop flow, removed 28 redundant places. [2023-01-27 23:54:23,819 INFO L231 Difference]: Finished difference. Result has 545 places, 665 transitions, 15758 flow [2023-01-27 23:54:23,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8970, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=15758, PETRI_PLACES=545, PETRI_TRANSITIONS=665} [2023-01-27 23:54:23,820 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 527 predicate places. [2023-01-27 23:54:23,821 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 665 transitions, 15758 flow [2023-01-27 23:54:23,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 52.26086956521739) internal successors, (2404), 46 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:23,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:23,822 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:23,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 23:54:24,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 23:54:24,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:54:24,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2091543568, now seen corresponding path program 13 times [2023-01-27 23:54:24,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:24,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953855420] [2023-01-27 23:54:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953855420] [2023-01-27 23:54:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953855420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:54:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706967302] [2023-01-27 23:54:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:54:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:24,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:54:24,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 23:54:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:25,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 23:54:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:54:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:25,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:54:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706967302] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:54:26,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:54:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 85 [2023-01-27 23:54:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436610365] [2023-01-27 23:54:26,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:54:26,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-01-27 23:54:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-01-27 23:54:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1745, Invalid=5737, Unknown=0, NotChecked=0, Total=7482 [2023-01-27 23:54:26,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:54:26,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 665 transitions, 15758 flow. Second operand has 87 states, 87 states have (on average 52.12643678160919) internal successors, (4535), 87 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:26,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:26,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:54:26,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:30,934 INFO L130 PetriNetUnfolder]: 2848/5235 cut-off events. [2023-01-27 23:54:30,935 INFO L131 PetriNetUnfolder]: For 3313683/3313683 co-relation queries the response was YES. [2023-01-27 23:54:30,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118785 conditions, 5235 events. 2848/5235 cut-off events. For 3313683/3313683 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 29019 event pairs, 28 based on Foata normal form. 12/5247 useless extension candidates. Maximal degree in co-relation 118557. Up to 2182 conditions per place. [2023-01-27 23:54:31,014 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 137 selfloop transitions, 695 changer transitions 170/1002 dead transitions. [2023-01-27 23:54:31,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1002 transitions, 36281 flow [2023-01-27 23:54:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-01-27 23:54:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-01-27 23:54:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4898 transitions. [2023-01-27 23:54:31,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2023-01-27 23:54:31,020 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4898 transitions. [2023-01-27 23:54:31,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4898 transitions. [2023-01-27 23:54:31,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:31,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4898 transitions. [2023-01-27 23:54:31,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 55.65909090909091) internal successors, (4898), 88 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 124.0) internal successors, (11036), 89 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:31,037 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 124.0) internal successors, (11036), 89 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:31,037 INFO L175 Difference]: Start difference. First operand has 545 places, 665 transitions, 15758 flow. Second operand 88 states and 4898 transitions. [2023-01-27 23:54:31,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1002 transitions, 36281 flow [2023-01-27 23:54:38,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1002 transitions, 28597 flow, removed 3704 selfloop flow, removed 20 redundant places. [2023-01-27 23:54:38,507 INFO L231 Difference]: Finished difference. Result has 620 places, 730 transitions, 14532 flow [2023-01-27 23:54:38,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=11300, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=14532, PETRI_PLACES=620, PETRI_TRANSITIONS=730} [2023-01-27 23:54:38,508 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 602 predicate places. [2023-01-27 23:54:38,508 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 730 transitions, 14532 flow [2023-01-27 23:54:38,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 52.12643678160919) internal successors, (4535), 87 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:38,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:38,509 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:38,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 23:54:38,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 23:54:38,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:54:38,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash 97653521, now seen corresponding path program 14 times [2023-01-27 23:54:38,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:38,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687174121] [2023-01-27 23:54:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687174121] [2023-01-27 23:54:39,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687174121] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:54:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803435011] [2023-01-27 23:54:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:54:39,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:54:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:39,084 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:54:39,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 23:54:39,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:54:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:54:39,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 23:54:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:54:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:39,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:54:39,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803435011] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:39,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 23:54:39,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2023-01-27 23:54:39,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34348867] [2023-01-27 23:54:39,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:39,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 23:54:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 23:54:39,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2023-01-27 23:54:39,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 124 [2023-01-27 23:54:39,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 730 transitions, 14532 flow. Second operand has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:39,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:39,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 124 [2023-01-27 23:54:39,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:58,547 INFO L130 PetriNetUnfolder]: 30156/45600 cut-off events. [2023-01-27 23:54:58,547 INFO L131 PetriNetUnfolder]: For 31142387/31142387 co-relation queries the response was YES. [2023-01-27 23:54:59,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977709 conditions, 45600 events. 30156/45600 cut-off events. For 31142387/31142387 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 294835 event pairs, 282 based on Foata normal form. 1157/46757 useless extension candidates. Maximal degree in co-relation 977472. Up to 18636 conditions per place. [2023-01-27 23:54:59,631 INFO L137 encePairwiseOnDemand]: 121/124 looper letters, 0 selfloop transitions, 0 changer transitions 8573/8573 dead transitions. [2023-01-27 23:54:59,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 8573 transitions, 178855 flow [2023-01-27 23:54:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:54:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:54:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1442 transitions. [2023-01-27 23:54:59,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056100981767181 [2023-01-27 23:54:59,634 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1442 transitions. [2023-01-27 23:54:59,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1442 transitions. [2023-01-27 23:54:59,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:59,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1442 transitions. [2023-01-27 23:54:59,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 62.69565217391305) internal successors, (1442), 23 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 124.0) internal successors, (2976), 24 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,637 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 124.0) internal successors, (2976), 24 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,637 INFO L175 Difference]: Start difference. First operand has 620 places, 730 transitions, 14532 flow. Second operand 23 states and 1442 transitions. [2023-01-27 23:54:59,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 8573 transitions, 178855 flow [2023-01-27 23:56:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 8573 transitions, 166535 flow, removed 656 selfloop flow, removed 55 redundant places. [2023-01-27 23:56:02,290 INFO L231 Difference]: Finished difference. Result has 586 places, 0 transitions, 0 flow [2023-01-27 23:56:02,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=12384, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=586, PETRI_TRANSITIONS=0} [2023-01-27 23:56:02,290 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 568 predicate places. [2023-01-27 23:56:02,291 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 0 transitions, 0 flow [2023-01-27 23:56:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:56:02,294 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:56:02,294 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:56:02,294 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:56:02,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 23:56:02,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 23:56:02,500 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2023-01-27 23:56:02,502 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:56:02,502 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:56:02,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:56:02 BasicIcfg [2023-01-27 23:56:02,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:56:02,505 INFO L158 Benchmark]: Toolchain (without parser) took 136276.50ms. Allocated memory was 404.8MB in the beginning and 11.7GB in the end (delta: 11.3GB). Free memory was 362.6MB in the beginning and 7.8GB in the end (delta: -7.5GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-01-27 23:56:02,505 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:56:02,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.35ms. Allocated memory is still 404.8MB. Free memory was 362.6MB in the beginning and 343.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 23:56:02,506 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.24ms. Allocated memory is still 404.8MB. Free memory was 343.3MB in the beginning and 341.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:56:02,507 INFO L158 Benchmark]: Boogie Preprocessor took 25.82ms. Allocated memory is still 404.8MB. Free memory was 341.4MB in the beginning and 340.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:56:02,507 INFO L158 Benchmark]: RCFGBuilder took 322.59ms. Allocated memory is still 404.8MB. Free memory was 340.1MB in the beginning and 327.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 23:56:02,507 INFO L158 Benchmark]: TraceAbstraction took 135563.60ms. Allocated memory was 404.8MB in the beginning and 11.7GB in the end (delta: 11.3GB). Free memory was 326.8MB in the beginning and 7.8GB in the end (delta: -7.5GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-01-27 23:56:02,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 328.35ms. Allocated memory is still 404.8MB. Free memory was 362.6MB in the beginning and 343.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.24ms. Allocated memory is still 404.8MB. Free memory was 343.3MB in the beginning and 341.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.82ms. Allocated memory is still 404.8MB. Free memory was 341.4MB in the beginning and 340.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 322.59ms. Allocated memory is still 404.8MB. Free memory was 340.1MB in the beginning and 327.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 135563.60ms. Allocated memory was 404.8MB in the beginning and 11.7GB in the end (delta: 11.3GB). Free memory was 326.8MB in the beginning and 7.8GB in the end (delta: -7.5GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 135.4s, OverallIterations: 17, TraceHistogramMax: 21, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 120.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6894 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6894 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 602 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4389 IncrementalHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 602 mSolverCounterUnsat, 0 mSDtfsCounter, 4389 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1228 GetRequests, 350 SyntacticMatches, 12 SemanticMatches, 866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25454 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15758occurred in iteration=15, InterpolantAutomatonStates: 558, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 652 NumberOfCodeBlocks, 651 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 868 ConstructedInterpolants, 0 QuantifiedInterpolants, 3624 SizeOfPredicates, 161 NumberOfNonLiveVariables, 2360 ConjunctsInSsa, 250 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 801/3398 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 23:56:02,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...