/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-fun.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:52:38,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:52:38,563 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:52:38,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:52:38,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:52:38,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:52:38,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:52:38,602 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:52:38,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:52:38,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:52:38,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:52:38,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:52:38,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:52:38,609 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:52:38,609 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:52:38,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:52:38,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:52:38,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:52:38,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:52:38,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:52:38,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:52:38,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:52:38,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:52:38,612 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:52:38,612 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:52:38,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:52:38,612 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:52:38,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:52:38,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:52:38,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:52:38,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:52:38,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:52:38,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:52:38,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:52:38,614 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:52:38,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:52:38,615 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:52:38,615 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:52:38,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:52:38,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:52:38,616 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:52:38,616 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:52:38,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:52:38,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:52:38,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:52:38,858 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:52:38,859 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:52:38,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-fun.wvr_bound2.c [2023-08-04 02:52:40,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:52:40,313 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:52:40,314 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-fun.wvr_bound2.c [2023-08-04 02:52:40,321 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e6339ff/e677177d3e6a41368ebda2de0ba2ec31/FLAG2ff7d55b1 [2023-08-04 02:52:40,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e6339ff/e677177d3e6a41368ebda2de0ba2ec31 [2023-08-04 02:52:40,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:52:40,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:52:40,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:52:40,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:52:40,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:52:40,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773e32e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40, skipping insertion in model container [2023-08-04 02:52:40,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,367 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:52:40,494 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-fun.wvr_bound2.c[2843,2856] [2023-08-04 02:52:40,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:52:40,507 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:52:40,526 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-fun.wvr_bound2.c[2843,2856] [2023-08-04 02:52:40,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:52:40,536 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:52:40,537 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:52:40,542 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:52:40,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40 WrapperNode [2023-08-04 02:52:40,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:52:40,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:52:40,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:52:40,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:52:40,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,580 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 230 [2023-08-04 02:52:40,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:52:40,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:52:40,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:52:40,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:52:40,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:52:40,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:52:40,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:52:40,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:52:40,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (1/1) ... [2023-08-04 02:52:40,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:52:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:40,653 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) [2023-08-04 02:52:40,667 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 [2023-08-04 02:52:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:52:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:52:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:52:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:52:40,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:52:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:52:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:52:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:52:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:52:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:52:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:52:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:52:40,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:52:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:52:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:52:40,709 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:52:40,825 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:52:40,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:52:41,200 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:52:41,329 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:52:41,329 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 02:52:41,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:52:41 BoogieIcfgContainer [2023-08-04 02:52:41,332 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:52:41,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:52:41,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:52:41,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:52:41,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:52:40" (1/3) ... [2023-08-04 02:52:41,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd0e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:52:41, skipping insertion in model container [2023-08-04 02:52:41,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:52:40" (2/3) ... [2023-08-04 02:52:41,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd0e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:52:41, skipping insertion in model container [2023-08-04 02:52:41,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:52:41" (3/3) ... [2023-08-04 02:52:41,343 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-counter-fun.wvr_bound2.c [2023-08-04 02:52:41,350 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:52:41,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:52:41,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:52:41,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:52:41,418 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:52:41,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,578 INFO L124 PetriNetUnfolderBase]: 40/325 cut-off events. [2023-08-04 02:52:41,579 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:52:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 325 events. 40/325 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 888 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-04 02:52:41,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:52:41,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 185 transitions, 392 flow [2023-08-04 02:52:41,682 INFO L124 PetriNetUnfolderBase]: 40/325 cut-off events. [2023-08-04 02:52:41,682 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:52:41,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 325 events. 40/325 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 888 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-04 02:52:41,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-04 02:52:47,084 INFO L134 LiptonReduction]: Checked pairs total: 3210 [2023-08-04 02:52:47,085 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-04 02:52:47,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:52:47,116 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38454359, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:52:47,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:52:47,121 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:52:47,121 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-08-04 02:52:47,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:52:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:47,122 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:47,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:52:47,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -340537463, now seen corresponding path program 1 times [2023-08-04 02:52:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:47,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459349754] [2023-08-04 02:52:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:47,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:52:47,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:52:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:52:47,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:52:47,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:52:47,451 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:52:47,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:52:47,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:52:47,461 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:52:47,464 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:52:47,465 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:52:47,465 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:52:47,510 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:52:47,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,622 INFO L124 PetriNetUnfolderBase]: 141/900 cut-off events. [2023-08-04 02:52:47,622 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:52:47,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 900 events. 141/900 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4264 event pairs, 2 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 561. Up to 32 conditions per place. [2023-08-04 02:52:47,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,632 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:52:47,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:47,727 INFO L124 PetriNetUnfolderBase]: 141/900 cut-off events. [2023-08-04 02:52:47,727 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:52:47,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 900 events. 141/900 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4264 event pairs, 2 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 561. Up to 32 conditions per place. [2023-08-04 02:52:47,747 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 02:52:53,582 INFO L134 LiptonReduction]: Checked pairs total: 9938 [2023-08-04 02:52:53,582 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-04 02:52:53,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:52:53,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38454359, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:52:53,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:52:53,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:52:53,592 INFO L124 PetriNetUnfolderBase]: 9/71 cut-off events. [2023-08-04 02:52:53,592 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:52:53,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:53,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:53,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:52:53,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1506743171, now seen corresponding path program 1 times [2023-08-04 02:52:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963225995] [2023-08-04 02:52:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:52:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:53,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963225995] [2023-08-04 02:52:53,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963225995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:53,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112693751] [2023-08-04 02:52:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:53,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:53,801 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) [2023-08-04 02:52:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:52:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:53,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:52:53,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:52:53,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:52:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112693751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:53,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:52:53,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:52:53,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489418366] [2023-08-04 02:52:53,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:52:54,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:52:54,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:54,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:54,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:52:54,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:55,199 INFO L124 PetriNetUnfolderBase]: 8631/11210 cut-off events. [2023-08-04 02:52:55,199 INFO L125 PetriNetUnfolderBase]: For 1019/1019 co-relation queries the response was YES. [2023-08-04 02:52:55,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22684 conditions, 11210 events. 8631/11210 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 49318 event pairs, 2466 based on Foata normal form. 0/6365 useless extension candidates. Maximal degree in co-relation 6877. Up to 10703 conditions per place. [2023-08-04 02:52:55,240 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 27 selfloop transitions, 5 changer transitions 17/56 dead transitions. [2023-08-04 02:52:55,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 250 flow [2023-08-04 02:52:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:52:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:52:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 919 transitions. [2023-08-04 02:52:55,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45607940446650125 [2023-08-04 02:52:55,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 919 transitions. [2023-08-04 02:52:55,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 919 transitions. [2023-08-04 02:52:55,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:55,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 919 transitions. [2023-08-04 02:52:55,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,294 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 144 flow. Second operand 5 states and 919 transitions. [2023-08-04 02:52:55,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 250 flow [2023-08-04 02:52:55,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:52:55,301 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 99 flow [2023-08-04 02:52:55,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-04 02:52:55,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-04 02:52:55,306 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 99 flow [2023-08-04 02:52:55,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:55,307 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:55,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:52:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:55,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:52:55,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1716187609, now seen corresponding path program 1 times [2023-08-04 02:52:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:55,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389127052] [2023-08-04 02:52:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:55,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:52:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389127052] [2023-08-04 02:52:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389127052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:55,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:52:55,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:52:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700478173] [2023-08-04 02:52:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:52:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:52:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:52:55,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 02:52:55,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:55,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 02:52:55,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:55,855 INFO L124 PetriNetUnfolderBase]: 1762/2337 cut-off events. [2023-08-04 02:52:55,855 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-08-04 02:52:55,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4778 conditions, 2337 events. 1762/2337 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8342 event pairs, 685 based on Foata normal form. 1/1405 useless extension candidates. Maximal degree in co-relation 1396. Up to 2193 conditions per place. [2023-08-04 02:52:55,869 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 25 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-04 02:52:55,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 156 flow [2023-08-04 02:52:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:52:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:52:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-04 02:52:55,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456575682382134 [2023-08-04 02:52:55,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-04 02:52:55,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-04 02:52:55,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:55,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-04 02:52:55,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,877 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 99 flow. Second operand 3 states and 552 transitions. [2023-08-04 02:52:55,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 156 flow [2023-08-04 02:52:55,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 153 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:52:55,879 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 95 flow [2023-08-04 02:52:55,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-04 02:52:55,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2023-08-04 02:52:55,880 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 95 flow [2023-08-04 02:52:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:55,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:55,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:55,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:52:55,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:52:55,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2106262063, now seen corresponding path program 1 times [2023-08-04 02:52:55,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:55,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153299440] [2023-08-04 02:52:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:52:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:55,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153299440] [2023-08-04 02:52:55,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153299440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713292781] [2023-08-04 02:52:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:55,933 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) [2023-08-04 02:52:55,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:52:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:56,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:52:56,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:52:56,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:52:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:52:56,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713292781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:52:56,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:52:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:52:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863111191] [2023-08-04 02:52:56,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:52:56,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:56,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:56,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:52:56,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:52:56,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:56,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:52:56,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:56,276 INFO L124 PetriNetUnfolderBase]: 1434/1874 cut-off events. [2023-08-04 02:52:56,276 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-04 02:52:56,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 1874 events. 1434/1874 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6183 event pairs, 357 based on Foata normal form. 3/1120 useless extension candidates. Maximal degree in co-relation 2803. Up to 1733 conditions per place. [2023-08-04 02:52:56,288 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 27 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-04 02:52:56,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 166 flow [2023-08-04 02:52:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:52:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:52:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 727 transitions. [2023-08-04 02:52:56,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509925558312655 [2023-08-04 02:52:56,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 727 transitions. [2023-08-04 02:52:56,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 727 transitions. [2023-08-04 02:52:56,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:56,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 727 transitions. [2023-08-04 02:52:56,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,298 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 95 flow. Second operand 4 states and 727 transitions. [2023-08-04 02:52:56,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 166 flow [2023-08-04 02:52:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:52:56,302 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 92 flow [2023-08-04 02:52:56,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-04 02:52:56,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-08-04 02:52:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 92 flow [2023-08-04 02:52:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:56,307 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:56,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:52:56,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:52:56,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:52:56,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 69605224, now seen corresponding path program 1 times [2023-08-04 02:52:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:56,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45719994] [2023-08-04 02:52:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:52:56,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:56,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45719994] [2023-08-04 02:52:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45719994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247717502] [2023-08-04 02:52:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:56,625 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) [2023-08-04 02:52:56,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:52:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:56,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:52:56,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:52:56,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:52:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247717502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:56,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:52:56,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:52:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121303672] [2023-08-04 02:52:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:52:56,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:52:56,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:56,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:52:56,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:56,935 INFO L124 PetriNetUnfolderBase]: 1002/1334 cut-off events. [2023-08-04 02:52:56,935 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-04 02:52:56,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 1334 events. 1002/1334 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4467 event pairs, 43 based on Foata normal form. 81/874 useless extension candidates. Maximal degree in co-relation 1025. Up to 558 conditions per place. [2023-08-04 02:52:56,939 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2023-08-04 02:52:56,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 214 flow [2023-08-04 02:52:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:52:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:52:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2023-08-04 02:52:56,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531017369727047 [2023-08-04 02:52:56,942 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2023-08-04 02:52:56,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2023-08-04 02:52:56,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:56,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2023-08-04 02:52:56,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,949 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 92 flow. Second operand 5 states and 913 transitions. [2023-08-04 02:52:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 214 flow [2023-08-04 02:52:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:52:56,951 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-04 02:52:56,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-04 02:52:56,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2023-08-04 02:52:56,953 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-04 02:52:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:52:56,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:52:56,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:52:56,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:52:57,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:57,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:52:57,161 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:52:57,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,240 INFO L124 PetriNetUnfolderBase]: 141/900 cut-off events. [2023-08-04 02:52:57,241 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:52:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 900 events. 141/900 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4264 event pairs, 2 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 561. Up to 32 conditions per place. [2023-08-04 02:52:57,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:52:57,249 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 211 transitions, 470 flow [2023-08-04 02:52:57,319 INFO L124 PetriNetUnfolderBase]: 141/900 cut-off events. [2023-08-04 02:52:57,320 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:52:57,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 900 events. 141/900 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4264 event pairs, 2 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 561. Up to 32 conditions per place. [2023-08-04 02:52:57,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 02:53:02,710 INFO L134 LiptonReduction]: Checked pairs total: 9756 [2023-08-04 02:53:02,711 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-04 02:53:02,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:53:02,713 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38454359, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:53:02,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:53:02,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:53:02,716 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-08-04 02:53:02,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:53:02,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:02,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:02,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 34505754, now seen corresponding path program 1 times [2023-08-04 02:53:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565931647] [2023-08-04 02:53:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:53:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565931647] [2023-08-04 02:53:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565931647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:53:02,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076785807] [2023-08-04 02:53:02,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:02,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:53:02,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 02:53:02,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:02,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:02,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 02:53:02,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:03,698 INFO L124 PetriNetUnfolderBase]: 8528/11041 cut-off events. [2023-08-04 02:53:03,699 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-04 02:53:03,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22388 conditions, 11041 events. 8528/11041 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 47475 event pairs, 3472 based on Foata normal form. 0/6250 useless extension candidates. Maximal degree in co-relation 6836. Up to 10604 conditions per place. [2023-08-04 02:53:03,755 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 39 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 02:53:03,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 232 flow [2023-08-04 02:53:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-04 02:53:03,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46980976013234077 [2023-08-04 02:53:03,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-04 02:53:03,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-04 02:53:03,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:03,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-04 02:53:03,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:03,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:03,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:03,767 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 144 flow. Second operand 3 states and 568 transitions. [2023-08-04 02:53:03,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 232 flow [2023-08-04 02:53:03,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:53:03,771 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 142 flow [2023-08-04 02:53:03,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-04 02:53:03,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 02:53:03,773 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 142 flow [2023-08-04 02:53:03,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:03,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:03,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:03,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:53:03,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:03,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1903626626, now seen corresponding path program 1 times [2023-08-04 02:53:03,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:03,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656499307] [2023-08-04 02:53:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:03,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:53:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:03,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656499307] [2023-08-04 02:53:03,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656499307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:03,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148519070] [2023-08-04 02:53:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:03,828 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) [2023-08-04 02:53:03,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:53:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:03,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:53:03,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:53:03,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:53:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148519070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:03,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:53:03,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:53:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661250991] [2023-08-04 02:53:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:03,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:03,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 02:53:03,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:03,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:03,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 02:53:03,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:04,758 INFO L124 PetriNetUnfolderBase]: 8490/11018 cut-off events. [2023-08-04 02:53:04,759 INFO L125 PetriNetUnfolderBase]: For 836/836 co-relation queries the response was YES. [2023-08-04 02:53:04,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22268 conditions, 11018 events. 8490/11018 cut-off events. For 836/836 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49161 event pairs, 3438 based on Foata normal form. 0/6265 useless extension candidates. Maximal degree in co-relation 22230. Up to 10393 conditions per place. [2023-08-04 02:53:04,801 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 44 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 02:53:04,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 250 flow [2023-08-04 02:53:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-08-04 02:53:04,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47229114971050457 [2023-08-04 02:53:04,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-08-04 02:53:04,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-08-04 02:53:04,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:04,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-08-04 02:53:04,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:04,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:04,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:04,808 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 142 flow. Second operand 3 states and 571 transitions. [2023-08-04 02:53:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 250 flow [2023-08-04 02:53:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:53:04,813 INFO L231 Difference]: Finished difference. Result has 43 places, 47 transitions, 146 flow [2023-08-04 02:53:04,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=47} [2023-08-04 02:53:04,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-04 02:53:04,814 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 47 transitions, 146 flow [2023-08-04 02:53:04,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:04,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:04,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:04,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 02:53:05,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:05,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:05,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 50099893, now seen corresponding path program 1 times [2023-08-04 02:53:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149503886] [2023-08-04 02:53:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:53:05,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149503886] [2023-08-04 02:53:05,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149503886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610716159] [2023-08-04 02:53:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:05,064 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) [2023-08-04 02:53:05,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:53:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:05,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:53:05,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:53:05,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:53:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610716159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:05,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:53:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:53:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888422351] [2023-08-04 02:53:05,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:05,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:05,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:05,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 02:53:05,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:05,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:05,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 02:53:05,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:05,780 INFO L124 PetriNetUnfolderBase]: 7285/9576 cut-off events. [2023-08-04 02:53:05,781 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-04 02:53:05,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19653 conditions, 9576 events. 7285/9576 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 42983 event pairs, 2490 based on Foata normal form. 0/5676 useless extension candidates. Maximal degree in co-relation 6727. Up to 6832 conditions per place. [2023-08-04 02:53:05,826 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 02:53:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 290 flow [2023-08-04 02:53:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-04 02:53:05,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772539288668321 [2023-08-04 02:53:05,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-04 02:53:05,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-04 02:53:05,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:05,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-04 02:53:05,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:05,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:05,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:05,832 INFO L175 Difference]: Start difference. First operand has 43 places, 47 transitions, 146 flow. Second operand 3 states and 577 transitions. [2023-08-04 02:53:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 290 flow [2023-08-04 02:53:05,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:05,834 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 156 flow [2023-08-04 02:53:05,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-08-04 02:53:05,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 02:53:05,835 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 156 flow [2023-08-04 02:53:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:05,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:06,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:06,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:06,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1613815306, now seen corresponding path program 1 times [2023-08-04 02:53:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:06,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169882344] [2023-08-04 02:53:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:06,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:53:06,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169882344] [2023-08-04 02:53:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169882344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040123042] [2023-08-04 02:53:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:06,093 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) [2023-08-04 02:53:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:53:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:06,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:53:06,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:53:06,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:53:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040123042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:06,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:53:06,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:53:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465061643] [2023-08-04 02:53:06,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:06,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 02:53:06,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:06,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 02:53:06,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:06,891 INFO L124 PetriNetUnfolderBase]: 7162/9505 cut-off events. [2023-08-04 02:53:06,891 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 02:53:06,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20213 conditions, 9505 events. 7162/9505 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 42812 event pairs, 2789 based on Foata normal form. 0/5936 useless extension candidates. Maximal degree in co-relation 7255. Up to 7266 conditions per place. [2023-08-04 02:53:06,924 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 52 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 02:53:06,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 302 flow [2023-08-04 02:53:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-04 02:53:06,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772539288668321 [2023-08-04 02:53:06,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-04 02:53:06,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-04 02:53:06,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:06,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-04 02:53:06,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:06,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:06,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:06,930 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 156 flow. Second operand 3 states and 577 transitions. [2023-08-04 02:53:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 302 flow [2023-08-04 02:53:06,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:06,937 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 166 flow [2023-08-04 02:53:06,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-08-04 02:53:06,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-04 02:53:06,938 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 166 flow [2023-08-04 02:53:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:06,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:07,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:07,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:07,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash 673424956, now seen corresponding path program 1 times [2023-08-04 02:53:07,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:07,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041282427] [2023-08-04 02:53:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:53:07,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:07,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041282427] [2023-08-04 02:53:07,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041282427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:07,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003867690] [2023-08-04 02:53:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:07,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:07,200 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) [2023-08-04 02:53:07,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:53:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:07,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:53:07,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:53:07,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:53:07,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003867690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:07,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:07,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:53:07,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68119483] [2023-08-04 02:53:07,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:07,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:07,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:07,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:53:07,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:07,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:07,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:53:07,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:07,864 INFO L124 PetriNetUnfolderBase]: 6455/8558 cut-off events. [2023-08-04 02:53:07,864 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-04 02:53:07,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18397 conditions, 8558 events. 6455/8558 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38225 event pairs, 1919 based on Foata normal form. 3/5408 useless extension candidates. Maximal degree in co-relation 12370. Up to 8129 conditions per place. [2023-08-04 02:53:07,895 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 45 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 02:53:07,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 280 flow [2023-08-04 02:53:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:53:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:53:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-08-04 02:53:07,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609181141439206 [2023-08-04 02:53:07,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-08-04 02:53:07,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-08-04 02:53:07,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:07,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-08-04 02:53:07,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:07,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:07,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:07,902 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 166 flow. Second operand 4 states and 743 transitions. [2023-08-04 02:53:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 280 flow [2023-08-04 02:53:07,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:07,924 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 178 flow [2023-08-04 02:53:07,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-04 02:53:07,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-04 02:53:07,926 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 178 flow [2023-08-04 02:53:07,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:07,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:07,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:07,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:08,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:08,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:08,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash 437896530, now seen corresponding path program 1 times [2023-08-04 02:53:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:08,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979586071] [2023-08-04 02:53:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:08,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:53:08,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979586071] [2023-08-04 02:53:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979586071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970678605] [2023-08-04 02:53:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:08,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:08,200 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) [2023-08-04 02:53:08,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:53:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:08,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:53:08,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:53:08,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:53:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970678605] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:53:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968054917] [2023-08-04 02:53:08,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:08,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:08,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:53:08,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:08,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:08,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:53:08,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:09,039 INFO L124 PetriNetUnfolderBase]: 6116/8102 cut-off events. [2023-08-04 02:53:09,039 INFO L125 PetriNetUnfolderBase]: For 778/778 co-relation queries the response was YES. [2023-08-04 02:53:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17367 conditions, 8102 events. 6116/8102 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 36596 event pairs, 1699 based on Foata normal form. 27/5132 useless extension candidates. Maximal degree in co-relation 11406. Up to 6556 conditions per place. [2023-08-04 02:53:09,073 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 53 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 02:53:09,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 324 flow [2023-08-04 02:53:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:53:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:53:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2023-08-04 02:53:09,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658808933002481 [2023-08-04 02:53:09,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2023-08-04 02:53:09,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2023-08-04 02:53:09,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:09,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2023-08-04 02:53:09,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,081 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 178 flow. Second operand 4 states and 751 transitions. [2023-08-04 02:53:09,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 324 flow [2023-08-04 02:53:09,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 315 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:53:09,094 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 183 flow [2023-08-04 02:53:09,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-04 02:53:09,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-04 02:53:09,094 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 183 flow [2023-08-04 02:53:09,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:09,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:09,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:09,300 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,SelfDestructingSolverStorable10 [2023-08-04 02:53:09,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:09,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1588094830, now seen corresponding path program 1 times [2023-08-04 02:53:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022751029] [2023-08-04 02:53:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:53:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022751029] [2023-08-04 02:53:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022751029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721793383] [2023-08-04 02:53:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:09,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:09,357 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) [2023-08-04 02:53:09,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:53:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:09,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:53:09,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:53:09,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:53:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721793383] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:09,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:09,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:53:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497764348] [2023-08-04 02:53:09,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:09,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:53:09,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 179.4) internal successors, (897), 5 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) [2023-08-04 02:53:09,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:09,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:53:09,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:09,937 INFO L124 PetriNetUnfolderBase]: 4138/5533 cut-off events. [2023-08-04 02:53:09,937 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2023-08-04 02:53:09,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 5533 events. 4138/5533 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22774 event pairs, 747 based on Foata normal form. 108/3588 useless extension candidates. Maximal degree in co-relation 10564. Up to 2084 conditions per place. [2023-08-04 02:53:09,961 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 59 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-04 02:53:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 362 flow [2023-08-04 02:53:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:53:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:53:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-04 02:53:09,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696029776674938 [2023-08-04 02:53:09,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-04 02:53:09,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-04 02:53:09,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:09,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-04 02:53:09,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:09,968 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 183 flow. Second operand 4 states and 757 transitions. [2023-08-04 02:53:09,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 362 flow [2023-08-04 02:53:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 352 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:53:09,976 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 194 flow [2023-08-04 02:53:09,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 02:53:09,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-04 02:53:09,977 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 194 flow [2023-08-04 02:53:09,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.4) internal successors, (897), 5 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) [2023-08-04 02:53:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:09,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:09,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:10,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:10,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1641256620, now seen corresponding path program 1 times [2023-08-04 02:53:10,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:10,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267487884] [2023-08-04 02:53:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:10,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:53:10,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267487884] [2023-08-04 02:53:10,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267487884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654339616] [2023-08-04 02:53:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:10,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:10,238 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) [2023-08-04 02:53:10,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:53:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:10,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:53:10,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:53:10,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:53:10,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654339616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:10,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:10,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:53:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371671735] [2023-08-04 02:53:10,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:10,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:10,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:10,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 02:53:10,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 179.8) internal successors, (899), 5 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) [2023-08-04 02:53:10,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:10,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 02:53:10,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:10,801 INFO L124 PetriNetUnfolderBase]: 4122/5506 cut-off events. [2023-08-04 02:53:10,801 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-04 02:53:10,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 5506 events. 4122/5506 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22603 event pairs, 1861 based on Foata normal form. 13/3474 useless extension candidates. Maximal degree in co-relation 11110. Up to 4665 conditions per place. [2023-08-04 02:53:10,819 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 59 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-08-04 02:53:10,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 374 flow [2023-08-04 02:53:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:53:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:53:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-04 02:53:10,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696029776674938 [2023-08-04 02:53:10,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-04 02:53:10,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-04 02:53:10,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:10,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-04 02:53:10,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:10,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:10,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:10,825 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 194 flow. Second operand 4 states and 757 transitions. [2023-08-04 02:53:10,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 374 flow [2023-08-04 02:53:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:10,834 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 198 flow [2023-08-04 02:53:10,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-04 02:53:10,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-08-04 02:53:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 198 flow [2023-08-04 02:53:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.8) internal successors, (899), 5 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) [2023-08-04 02:53:10,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:10,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:10,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:11,035 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,SelfDestructingSolverStorable12 [2023-08-04 02:53:11,036 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:11,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -207476330, now seen corresponding path program 1 times [2023-08-04 02:53:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342809244] [2023-08-04 02:53:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:53:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342809244] [2023-08-04 02:53:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342809244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 02:53:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075960196] [2023-08-04 02:53:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:53:11,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 403 [2023-08-04 02:53:11,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:11,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:11,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 403 [2023-08-04 02:53:11,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:11,750 INFO L124 PetriNetUnfolderBase]: 4909/6391 cut-off events. [2023-08-04 02:53:11,750 INFO L125 PetriNetUnfolderBase]: For 3430/3430 co-relation queries the response was YES. [2023-08-04 02:53:11,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 6391 events. 4909/6391 cut-off events. For 3430/3430 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25196 event pairs, 500 based on Foata normal form. 1/3952 useless extension candidates. Maximal degree in co-relation 14536. Up to 5460 conditions per place. [2023-08-04 02:53:11,778 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 69 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2023-08-04 02:53:11,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 506 flow [2023-08-04 02:53:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-04 02:53:11,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793217535153017 [2023-08-04 02:53:11,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-04 02:53:11,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-04 02:53:11,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:11,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-04 02:53:11,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:11,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:11,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:11,785 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 198 flow. Second operand 3 states and 602 transitions. [2023-08-04 02:53:11,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 506 flow [2023-08-04 02:53:11,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 490 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:53:11,794 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 223 flow [2023-08-04 02:53:11,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-08-04 02:53:11,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-08-04 02:53:11,796 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 223 flow [2023-08-04 02:53:11,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:11,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:11,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 02:53:11,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:11,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1508435556, now seen corresponding path program 1 times [2023-08-04 02:53:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:11,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781127679] [2023-08-04 02:53:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:53:11,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:11,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781127679] [2023-08-04 02:53:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781127679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:53:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169714131] [2023-08-04 02:53:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:53:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:53:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:53:12,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:12,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:12,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:12,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:12,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:12,788 INFO L124 PetriNetUnfolderBase]: 5640/8146 cut-off events. [2023-08-04 02:53:12,788 INFO L125 PetriNetUnfolderBase]: For 5733/5733 co-relation queries the response was YES. [2023-08-04 02:53:12,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21513 conditions, 8146 events. 5640/8146 cut-off events. For 5733/5733 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 42908 event pairs, 3006 based on Foata normal form. 870/9014 useless extension candidates. Maximal degree in co-relation 21026. Up to 6025 conditions per place. [2023-08-04 02:53:12,817 INFO L140 encePairwiseOnDemand]: 395/403 looper letters, 44 selfloop transitions, 2 changer transitions 67/121 dead transitions. [2023-08-04 02:53:12,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 121 transitions, 761 flow [2023-08-04 02:53:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 950 transitions. [2023-08-04 02:53:12,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47146401985111663 [2023-08-04 02:53:12,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 950 transitions. [2023-08-04 02:53:12,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 950 transitions. [2023-08-04 02:53:12,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:12,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 950 transitions. [2023-08-04 02:53:12,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:12,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:12,825 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:12,825 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 223 flow. Second operand 5 states and 950 transitions. [2023-08-04 02:53:12,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 121 transitions, 761 flow [2023-08-04 02:53:12,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 121 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:12,850 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 248 flow [2023-08-04 02:53:12,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-08-04 02:53:12,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2023-08-04 02:53:12,850 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 248 flow [2023-08-04 02:53:12,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:12,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:12,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:12,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:53:12,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:12,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1605722959, now seen corresponding path program 1 times [2023-08-04 02:53:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:12,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538318208] [2023-08-04 02:53:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:53:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538318208] [2023-08-04 02:53:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538318208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949614290] [2023-08-04 02:53:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:12,942 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) [2023-08-04 02:53:12,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:53:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:13,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:53:13,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:53:13,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:53:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949614290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:13,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:53:13,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-04 02:53:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639903068] [2023-08-04 02:53:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:53:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:53:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 02:53:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:13,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:13,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:13,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:13,821 INFO L124 PetriNetUnfolderBase]: 5176/7256 cut-off events. [2023-08-04 02:53:13,822 INFO L125 PetriNetUnfolderBase]: For 9205/9205 co-relation queries the response was YES. [2023-08-04 02:53:13,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19771 conditions, 7256 events. 5176/7256 cut-off events. For 9205/9205 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35202 event pairs, 2561 based on Foata normal form. 435/7690 useless extension candidates. Maximal degree in co-relation 19746. Up to 6026 conditions per place. [2023-08-04 02:53:13,846 INFO L140 encePairwiseOnDemand]: 396/403 looper letters, 45 selfloop transitions, 2 changer transitions 32/87 dead transitions. [2023-08-04 02:53:13,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 562 flow [2023-08-04 02:53:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:53:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:53:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 746 transitions. [2023-08-04 02:53:13,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627791563275434 [2023-08-04 02:53:13,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 746 transitions. [2023-08-04 02:53:13,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 746 transitions. [2023-08-04 02:53:13,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:13,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 746 transitions. [2023-08-04 02:53:13,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:13,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:13,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:13,851 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 248 flow. Second operand 4 states and 746 transitions. [2023-08-04 02:53:13,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 562 flow [2023-08-04 02:53:13,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 546 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-04 02:53:13,865 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 254 flow [2023-08-04 02:53:13,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-08-04 02:53:13,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2023-08-04 02:53:13,866 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 254 flow [2023-08-04 02:53:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:13,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:13,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:13,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:14,072 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 [2023-08-04 02:53:14,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:14,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1741070509, now seen corresponding path program 1 times [2023-08-04 02:53:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:14,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376673217] [2023-08-04 02:53:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:14,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376673217] [2023-08-04 02:53:14,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376673217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641248351] [2023-08-04 02:53:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:14,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:14,197 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) [2023-08-04 02:53:14,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:53:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:14,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:53:14,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:14,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641248351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:14,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:53:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174550707] [2023-08-04 02:53:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:53:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:53:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:53:14,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:14,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 254 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:14,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:14,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:15,457 INFO L124 PetriNetUnfolderBase]: 8326/11132 cut-off events. [2023-08-04 02:53:15,457 INFO L125 PetriNetUnfolderBase]: For 10400/10400 co-relation queries the response was YES. [2023-08-04 02:53:15,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30920 conditions, 11132 events. 8326/11132 cut-off events. For 10400/10400 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 53654 event pairs, 871 based on Foata normal form. 196/11328 useless extension candidates. Maximal degree in co-relation 30889. Up to 4866 conditions per place. [2023-08-04 02:53:15,506 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 140 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2023-08-04 02:53:15,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 151 transitions, 1005 flow [2023-08-04 02:53:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 969 transitions. [2023-08-04 02:53:15,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480893300248139 [2023-08-04 02:53:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 969 transitions. [2023-08-04 02:53:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 969 transitions. [2023-08-04 02:53:15,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:15,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 969 transitions. [2023-08-04 02:53:15,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:15,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:15,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:15,513 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 254 flow. Second operand 5 states and 969 transitions. [2023-08-04 02:53:15,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 151 transitions, 1005 flow [2023-08-04 02:53:15,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 151 transitions, 973 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-04 02:53:15,532 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 271 flow [2023-08-04 02:53:15,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-04 02:53:15,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2023-08-04 02:53:15,532 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 271 flow [2023-08-04 02:53:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:15,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:15,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:15,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:15,738 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 [2023-08-04 02:53:15,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:15,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -348547653, now seen corresponding path program 1 times [2023-08-04 02:53:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896317056] [2023-08-04 02:53:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:53:15,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896317056] [2023-08-04 02:53:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896317056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:15,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126457778] [2023-08-04 02:53:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:15,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:15,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:53:15,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:15,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:15,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:53:15,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:17,423 INFO L124 PetriNetUnfolderBase]: 13306/18237 cut-off events. [2023-08-04 02:53:17,423 INFO L125 PetriNetUnfolderBase]: For 20670/20670 co-relation queries the response was YES. [2023-08-04 02:53:17,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53450 conditions, 18237 events. 13306/18237 cut-off events. For 20670/20670 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 99356 event pairs, 3385 based on Foata normal form. 184/18420 useless extension candidates. Maximal degree in co-relation 53418. Up to 8250 conditions per place. [2023-08-04 02:53:17,507 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 144 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2023-08-04 02:53:17,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 157 transitions, 1065 flow [2023-08-04 02:53:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 976 transitions. [2023-08-04 02:53:17,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843672456575682 [2023-08-04 02:53:17,510 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 976 transitions. [2023-08-04 02:53:17,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 976 transitions. [2023-08-04 02:53:17,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:17,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 976 transitions. [2023-08-04 02:53:17,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:17,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:17,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:17,515 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 271 flow. Second operand 5 states and 976 transitions. [2023-08-04 02:53:17,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 157 transitions, 1065 flow [2023-08-04 02:53:17,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 157 transitions, 1060 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:17,592 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 315 flow [2023-08-04 02:53:17,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-04 02:53:17,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2023-08-04 02:53:17,593 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 315 flow [2023-08-04 02:53:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:17,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 02:53:17,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:17,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1417929716, now seen corresponding path program 1 times [2023-08-04 02:53:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000475147] [2023-08-04 02:53:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:17,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000475147] [2023-08-04 02:53:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000475147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:17,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:17,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314062013] [2023-08-04 02:53:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:17,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:53:17,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:17,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:17,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:53:17,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:19,662 INFO L124 PetriNetUnfolderBase]: 14374/19932 cut-off events. [2023-08-04 02:53:19,662 INFO L125 PetriNetUnfolderBase]: For 34354/34354 co-relation queries the response was YES. [2023-08-04 02:53:19,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63792 conditions, 19932 events. 14374/19932 cut-off events. For 34354/34354 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 113596 event pairs, 3476 based on Foata normal form. 184/20116 useless extension candidates. Maximal degree in co-relation 63757. Up to 8888 conditions per place. [2023-08-04 02:53:19,756 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 155 selfloop transitions, 6 changer transitions 0/167 dead transitions. [2023-08-04 02:53:19,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 167 transitions, 1185 flow [2023-08-04 02:53:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 980 transitions. [2023-08-04 02:53:19,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48635235732009924 [2023-08-04 02:53:19,763 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 980 transitions. [2023-08-04 02:53:19,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 980 transitions. [2023-08-04 02:53:19,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:19,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 980 transitions. [2023-08-04 02:53:19,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:19,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:19,769 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:19,769 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 315 flow. Second operand 5 states and 980 transitions. [2023-08-04 02:53:19,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 167 transitions, 1185 flow [2023-08-04 02:53:19,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 167 transitions, 1150 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:19,882 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 338 flow [2023-08-04 02:53:19,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2023-08-04 02:53:19,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2023-08-04 02:53:19,883 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 338 flow [2023-08-04 02:53:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:19,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:19,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 02:53:19,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:19,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1060258309, now seen corresponding path program 2 times [2023-08-04 02:53:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:19,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798459746] [2023-08-04 02:53:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:53:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798459746] [2023-08-04 02:53:20,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798459746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357088159] [2023-08-04 02:53:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:53:20,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:20,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:20,094 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:53:20,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:53:20,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:53:20,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:53:20,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:53:20,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:53:20,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:53:20,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357088159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:20,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:20,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 02:53:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539670744] [2023-08-04 02:53:20,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:20,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 02:53:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 02:53:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 02:53:20,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 173.1) internal successors, (1731), 10 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:20,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:20,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:22,855 INFO L124 PetriNetUnfolderBase]: 18604/25724 cut-off events. [2023-08-04 02:53:22,855 INFO L125 PetriNetUnfolderBase]: For 52714/52714 co-relation queries the response was YES. [2023-08-04 02:53:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86248 conditions, 25724 events. 18604/25724 cut-off events. For 52714/52714 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 151348 event pairs, 4507 based on Foata normal form. 196/25919 useless extension candidates. Maximal degree in co-relation 86210. Up to 9023 conditions per place. [2023-08-04 02:53:22,984 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 147 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-08-04 02:53:22,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 166 transitions, 1214 flow [2023-08-04 02:53:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2023-08-04 02:53:22,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823821339950372 [2023-08-04 02:53:22,986 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2023-08-04 02:53:22,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2023-08-04 02:53:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2023-08-04 02:53:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:22,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:22,990 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 338 flow. Second operand 5 states and 972 transitions. [2023-08-04 02:53:22,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 166 transitions, 1214 flow [2023-08-04 02:53:23,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 166 transitions, 1182 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-04 02:53:23,096 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 422 flow [2023-08-04 02:53:23,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-08-04 02:53:23,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2023-08-04 02:53:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 422 flow [2023-08-04 02:53:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.1) internal successors, (1731), 10 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:23,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:23,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:23,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-04 02:53:23,302 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:23,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1146285676, now seen corresponding path program 2 times [2023-08-04 02:53:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:23,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772155956] [2023-08-04 02:53:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772155956] [2023-08-04 02:53:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772155956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:23,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:23,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348949908] [2023-08-04 02:53:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:23,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:23,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-04 02:53:23,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:23,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:23,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-04 02:53:23,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:26,198 INFO L124 PetriNetUnfolderBase]: 20014/28104 cut-off events. [2023-08-04 02:53:26,198 INFO L125 PetriNetUnfolderBase]: For 70088/70088 co-relation queries the response was YES. [2023-08-04 02:53:26,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96675 conditions, 28104 events. 20014/28104 cut-off events. For 70088/70088 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 168251 event pairs, 7571 based on Foata normal form. 196/28300 useless extension candidates. Maximal degree in co-relation 96634. Up to 11501 conditions per place. [2023-08-04 02:53:26,356 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 153 selfloop transitions, 14 changer transitions 0/173 dead transitions. [2023-08-04 02:53:26,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 173 transitions, 1314 flow [2023-08-04 02:53:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 979 transitions. [2023-08-04 02:53:26,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858560794044665 [2023-08-04 02:53:26,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 979 transitions. [2023-08-04 02:53:26,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 979 transitions. [2023-08-04 02:53:26,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:26,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 979 transitions. [2023-08-04 02:53:26,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:26,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:26,362 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:26,362 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 422 flow. Second operand 5 states and 979 transitions. [2023-08-04 02:53:26,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 173 transitions, 1314 flow [2023-08-04 02:53:26,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1284 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:26,618 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 510 flow [2023-08-04 02:53:26,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2023-08-04 02:53:26,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2023-08-04 02:53:26,618 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 510 flow [2023-08-04 02:53:26,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:26,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:26,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 02:53:26,619 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:26,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 617961028, now seen corresponding path program 3 times [2023-08-04 02:53:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:26,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164524527] [2023-08-04 02:53:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:26,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:53:26,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:26,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164524527] [2023-08-04 02:53:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164524527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:26,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833407927] [2023-08-04 02:53:26,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:53:26,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:26,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:53:26,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:53:26,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 02:53:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:53:26,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:53:26,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:53:26,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:53:26,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833407927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:26,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:26,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:53:26,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403006054] [2023-08-04 02:53:26,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:26,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:53:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:53:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:53:26,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:26,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 510 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:26,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:26,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:29,965 INFO L124 PetriNetUnfolderBase]: 21178/29007 cut-off events. [2023-08-04 02:53:29,965 INFO L125 PetriNetUnfolderBase]: For 75129/75129 co-relation queries the response was YES. [2023-08-04 02:53:30,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104221 conditions, 29007 events. 21178/29007 cut-off events. For 75129/75129 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 170464 event pairs, 3093 based on Foata normal form. 196/29202 useless extension candidates. Maximal degree in co-relation 104177. Up to 16034 conditions per place. [2023-08-04 02:53:30,151 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 144 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2023-08-04 02:53:30,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 164 transitions, 1291 flow [2023-08-04 02:53:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 965 transitions. [2023-08-04 02:53:30,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47890818858560796 [2023-08-04 02:53:30,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 965 transitions. [2023-08-04 02:53:30,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 965 transitions. [2023-08-04 02:53:30,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:30,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 965 transitions. [2023-08-04 02:53:30,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:30,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:30,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:30,158 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 510 flow. Second operand 5 states and 965 transitions. [2023-08-04 02:53:30,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 164 transitions, 1291 flow [2023-08-04 02:53:30,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 164 transitions, 1266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:30,423 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 556 flow [2023-08-04 02:53:30,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=556, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2023-08-04 02:53:30,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2023-08-04 02:53:30,423 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 556 flow [2023-08-04 02:53:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:30,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:30,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:30,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:53:30,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:30,629 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:30,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1046284117, now seen corresponding path program 1 times [2023-08-04 02:53:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:30,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731142507] [2023-08-04 02:53:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:53:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731142507] [2023-08-04 02:53:30,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731142507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:30,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:30,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989472569] [2023-08-04 02:53:30,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:30,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:53:30,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 556 flow. Second operand has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:30,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:30,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:53:30,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:34,257 INFO L124 PetriNetUnfolderBase]: 22432/32831 cut-off events. [2023-08-04 02:53:34,257 INFO L125 PetriNetUnfolderBase]: For 119565/122129 co-relation queries the response was YES. [2023-08-04 02:53:34,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116019 conditions, 32831 events. 22432/32831 cut-off events. For 119565/122129 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 216056 event pairs, 7143 based on Foata normal form. 3001/35719 useless extension candidates. Maximal degree in co-relation 115973. Up to 10251 conditions per place. [2023-08-04 02:53:34,458 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 160 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2023-08-04 02:53:34,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 183 transitions, 1493 flow [2023-08-04 02:53:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 977 transitions. [2023-08-04 02:53:34,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484863523573201 [2023-08-04 02:53:34,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 977 transitions. [2023-08-04 02:53:34,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 977 transitions. [2023-08-04 02:53:34,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:34,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 977 transitions. [2023-08-04 02:53:34,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.4) internal successors, (977), 5 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:34,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:34,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:34,464 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 556 flow. Second operand 5 states and 977 transitions. [2023-08-04 02:53:34,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 183 transitions, 1493 flow [2023-08-04 02:53:34,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 183 transitions, 1463 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 02:53:34,771 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 573 flow [2023-08-04 02:53:34,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2023-08-04 02:53:34,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2023-08-04 02:53:34,772 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 573 flow [2023-08-04 02:53:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:34,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:34,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:34,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 02:53:34,773 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:34,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -812915421, now seen corresponding path program 2 times [2023-08-04 02:53:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:34,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701636447] [2023-08-04 02:53:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:34,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:53:34,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:34,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701636447] [2023-08-04 02:53:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701636447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:34,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:34,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037441643] [2023-08-04 02:53:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:34,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:34,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:53:34,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 573 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:34,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:34,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:53:34,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:39,243 INFO L124 PetriNetUnfolderBase]: 26811/40087 cut-off events. [2023-08-04 02:53:39,243 INFO L125 PetriNetUnfolderBase]: For 151700/153818 co-relation queries the response was YES. [2023-08-04 02:53:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147244 conditions, 40087 events. 26811/40087 cut-off events. For 151700/153818 co-relation queries the response was YES. Maximal size of possible extension queue 1366. Compared 284662 event pairs, 5625 based on Foata normal form. 2466/42481 useless extension candidates. Maximal degree in co-relation 147196. Up to 12410 conditions per place. [2023-08-04 02:53:39,528 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 156 selfloop transitions, 15 changer transitions 0/180 dead transitions. [2023-08-04 02:53:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 180 transitions, 1519 flow [2023-08-04 02:53:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 973 transitions. [2023-08-04 02:53:39,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48287841191067 [2023-08-04 02:53:39,530 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 973 transitions. [2023-08-04 02:53:39,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 973 transitions. [2023-08-04 02:53:39,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:39,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 973 transitions. [2023-08-04 02:53:39,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:39,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:39,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:39,534 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 573 flow. Second operand 5 states and 973 transitions. [2023-08-04 02:53:39,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 180 transitions, 1519 flow [2023-08-04 02:53:40,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 180 transitions, 1475 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:53:40,193 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 601 flow [2023-08-04 02:53:40,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2023-08-04 02:53:40,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2023-08-04 02:53:40,194 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 601 flow [2023-08-04 02:53:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:40,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:40,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:40,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 02:53:40,194 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:40,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1992125327, now seen corresponding path program 3 times [2023-08-04 02:53:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424919210] [2023-08-04 02:53:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:53:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:40,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424919210] [2023-08-04 02:53:40,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424919210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:40,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:40,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:40,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714317112] [2023-08-04 02:53:40,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:40,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-04 02:53:40,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 80 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:40,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:40,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-04 02:53:40,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:45,765 INFO L124 PetriNetUnfolderBase]: 32846/49538 cut-off events. [2023-08-04 02:53:45,766 INFO L125 PetriNetUnfolderBase]: For 220340/223278 co-relation queries the response was YES. [2023-08-04 02:53:46,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187124 conditions, 49538 events. 32846/49538 cut-off events. For 220340/223278 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 371471 event pairs, 8439 based on Foata normal form. 4041/53423 useless extension candidates. Maximal degree in co-relation 187074. Up to 15882 conditions per place. [2023-08-04 02:53:46,189 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 153 selfloop transitions, 28 changer transitions 0/190 dead transitions. [2023-08-04 02:53:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 190 transitions, 1679 flow [2023-08-04 02:53:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 970 transitions. [2023-08-04 02:53:46,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813895781637717 [2023-08-04 02:53:46,375 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 970 transitions. [2023-08-04 02:53:46,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 970 transitions. [2023-08-04 02:53:46,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:46,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 970 transitions. [2023-08-04 02:53:46,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:46,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:46,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:46,379 INFO L175 Difference]: Start difference. First operand has 105 places, 80 transitions, 601 flow. Second operand 5 states and 970 transitions. [2023-08-04 02:53:46,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 190 transitions, 1679 flow [2023-08-04 02:53:47,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 190 transitions, 1635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:53:47,273 INFO L231 Difference]: Finished difference. Result has 110 places, 94 transitions, 822 flow [2023-08-04 02:53:47,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=822, PETRI_PLACES=110, PETRI_TRANSITIONS=94} [2023-08-04 02:53:47,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2023-08-04 02:53:47,274 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 94 transitions, 822 flow [2023-08-04 02:53:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:47,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:47,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:47,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 02:53:47,274 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:47,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1352954860, now seen corresponding path program 1 times [2023-08-04 02:53:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014652054] [2023-08-04 02:53:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:53:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014652054] [2023-08-04 02:53:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014652054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:47,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:53:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:53:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268233379] [2023-08-04 02:53:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:47,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:53:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:53:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:47,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-04 02:53:47,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 94 transitions, 822 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:47,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:47,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-04 02:53:47,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:52,585 INFO L124 PetriNetUnfolderBase]: 30685/46462 cut-off events. [2023-08-04 02:53:52,585 INFO L125 PetriNetUnfolderBase]: For 241103/243315 co-relation queries the response was YES. [2023-08-04 02:53:52,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192059 conditions, 46462 events. 30685/46462 cut-off events. For 241103/243315 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 348224 event pairs, 7855 based on Foata normal form. 2593/48728 useless extension candidates. Maximal degree in co-relation 192006. Up to 19335 conditions per place. [2023-08-04 02:53:52,989 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 160 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2023-08-04 02:53:52,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 198 transitions, 1853 flow [2023-08-04 02:53:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:53:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:53:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 976 transitions. [2023-08-04 02:53:52,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843672456575682 [2023-08-04 02:53:52,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 976 transitions. [2023-08-04 02:53:52,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 976 transitions. [2023-08-04 02:53:52,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:52,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 976 transitions. [2023-08-04 02:53:52,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:52,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:52,995 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:52,995 INFO L175 Difference]: Start difference. First operand has 110 places, 94 transitions, 822 flow. Second operand 5 states and 976 transitions. [2023-08-04 02:53:52,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 198 transitions, 1853 flow [2023-08-04 02:53:54,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 198 transitions, 1821 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:53:54,417 INFO L231 Difference]: Finished difference. Result has 114 places, 97 transitions, 911 flow [2023-08-04 02:53:54,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=911, PETRI_PLACES=114, PETRI_TRANSITIONS=97} [2023-08-04 02:53:54,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2023-08-04 02:53:54,417 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 97 transitions, 911 flow [2023-08-04 02:53:54,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:54,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 02:53:54,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:54,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1229549153, now seen corresponding path program 1 times [2023-08-04 02:53:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:54,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260546772] [2023-08-04 02:53:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:54,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260546772] [2023-08-04 02:53:54,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260546772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:54,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848083630] [2023-08-04 02:53:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:54,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:53:54,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 02:53:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:54,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:53:54,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:54,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:53:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:53:54,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848083630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:53:54,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:53:54,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:53:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212611401] [2023-08-04 02:53:54,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:53:54,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:53:54,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:53:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:53:54,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:53:54,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 97 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:53:54,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:54,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:53:54,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:54:01,583 INFO L124 PetriNetUnfolderBase]: 41612/62350 cut-off events. [2023-08-04 02:54:01,583 INFO L125 PetriNetUnfolderBase]: For 389719/404522 co-relation queries the response was YES. [2023-08-04 02:54:01,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269535 conditions, 62350 events. 41612/62350 cut-off events. For 389719/404522 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 461671 event pairs, 7521 based on Foata normal form. 8696/70593 useless extension candidates. Maximal degree in co-relation 269481. Up to 36206 conditions per place. [2023-08-04 02:54:02,109 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 197 selfloop transitions, 12 changer transitions 0/221 dead transitions. [2023-08-04 02:54:02,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 221 transitions, 2404 flow [2023-08-04 02:54:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:54:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:54:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 954 transitions. [2023-08-04 02:54:02,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47344913151364765 [2023-08-04 02:54:02,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 954 transitions. [2023-08-04 02:54:02,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 954 transitions. [2023-08-04 02:54:02,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:54:02,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 954 transitions. [2023-08-04 02:54:02,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:02,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:02,115 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:02,115 INFO L175 Difference]: Start difference. First operand has 114 places, 97 transitions, 911 flow. Second operand 5 states and 954 transitions. [2023-08-04 02:54:02,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 221 transitions, 2404 flow [2023-08-04 02:54:04,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 221 transitions, 2268 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-04 02:54:04,150 INFO L231 Difference]: Finished difference. Result has 118 places, 100 transitions, 917 flow [2023-08-04 02:54:04,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=917, PETRI_PLACES=118, PETRI_TRANSITIONS=100} [2023-08-04 02:54:04,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2023-08-04 02:54:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 100 transitions, 917 flow [2023-08-04 02:54:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:04,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:54:04,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:54:04,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 02:54:04,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 02:54:04,351 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:54:04,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:54:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1396354277, now seen corresponding path program 1 times [2023-08-04 02:54:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:54:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724280233] [2023-08-04 02:54:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:54:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:54:04,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:54:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724280233] [2023-08-04 02:54:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724280233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:54:04,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:54:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:54:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882236265] [2023-08-04 02:54:04,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:54:04,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:54:04,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:54:04,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:54:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:54:04,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:54:04,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 100 transitions, 917 flow. Second operand has 5 states, 5 states have (on average 177.4) internal successors, (887), 5 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:04,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:54:04,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:54:04,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:54:12,916 INFO L124 PetriNetUnfolderBase]: 48761/76017 cut-off events. [2023-08-04 02:54:12,917 INFO L125 PetriNetUnfolderBase]: For 498882/510919 co-relation queries the response was YES. [2023-08-04 02:54:13,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336620 conditions, 76017 events. 48761/76017 cut-off events. For 498882/510919 co-relation queries the response was YES. Maximal size of possible extension queue 2501. Compared 616040 event pairs, 10770 based on Foata normal form. 9325/84664 useless extension candidates. Maximal degree in co-relation 336563. Up to 27597 conditions per place. [2023-08-04 02:54:13,882 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 182 selfloop transitions, 15 changer transitions 3/214 dead transitions. [2023-08-04 02:54:13,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 214 transitions, 2202 flow [2023-08-04 02:54:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:54:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:54:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 971 transitions. [2023-08-04 02:54:13,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818858560794045 [2023-08-04 02:54:13,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 971 transitions. [2023-08-04 02:54:13,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 971 transitions. [2023-08-04 02:54:13,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:54:13,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 971 transitions. [2023-08-04 02:54:13,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.2) internal successors, (971), 5 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:13,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:13,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:13,888 INFO L175 Difference]: Start difference. First operand has 118 places, 100 transitions, 917 flow. Second operand 5 states and 971 transitions. [2023-08-04 02:54:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 214 transitions, 2202 flow [2023-08-04 02:54:16,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 214 transitions, 2166 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-04 02:54:16,917 INFO L231 Difference]: Finished difference. Result has 123 places, 101 transitions, 951 flow [2023-08-04 02:54:16,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=951, PETRI_PLACES=123, PETRI_TRANSITIONS=101} [2023-08-04 02:54:16,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2023-08-04 02:54:16,918 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 101 transitions, 951 flow [2023-08-04 02:54:16,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.4) internal successors, (887), 5 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:16,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:54:16,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:54:16,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 02:54:16,919 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:54:16,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:54:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1008267095, now seen corresponding path program 4 times [2023-08-04 02:54:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:54:16,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969709716] [2023-08-04 02:54:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:54:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:54:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:54:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969709716] [2023-08-04 02:54:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969709716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:54:16,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:54:16,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:54:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304334731] [2023-08-04 02:54:16,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:54:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:54:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:54:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:54:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:54:17,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-04 02:54:17,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 101 transitions, 951 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:17,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:54:17,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-04 02:54:17,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:54:25,966 INFO L124 PetriNetUnfolderBase]: 44849/70187 cut-off events. [2023-08-04 02:54:25,966 INFO L125 PetriNetUnfolderBase]: For 497877/505492 co-relation queries the response was YES. [2023-08-04 02:54:26,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314289 conditions, 70187 events. 44849/70187 cut-off events. For 497877/505492 co-relation queries the response was YES. Maximal size of possible extension queue 2448. Compared 577239 event pairs, 9758 based on Foata normal form. 7906/77447 useless extension candidates. Maximal degree in co-relation 314230. Up to 24215 conditions per place. [2023-08-04 02:54:26,753 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 206 selfloop transitions, 32 changer transitions 6/255 dead transitions. [2023-08-04 02:54:26,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 255 transitions, 2746 flow [2023-08-04 02:54:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:54:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:54:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1152 transitions. [2023-08-04 02:54:26,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47642679900744417 [2023-08-04 02:54:26,755 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1152 transitions. [2023-08-04 02:54:26,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1152 transitions. [2023-08-04 02:54:26,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:54:26,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1152 transitions. [2023-08-04 02:54:26,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:26,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:26,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:26,759 INFO L175 Difference]: Start difference. First operand has 123 places, 101 transitions, 951 flow. Second operand 6 states and 1152 transitions. [2023-08-04 02:54:26,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 255 transitions, 2746 flow [2023-08-04 02:54:30,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 2662 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:54:30,966 INFO L231 Difference]: Finished difference. Result has 130 places, 122 transitions, 1377 flow [2023-08-04 02:54:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1377, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2023-08-04 02:54:30,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2023-08-04 02:54:30,967 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 1377 flow [2023-08-04 02:54:30,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:30,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:54:30,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:54:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-04 02:54:30,968 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:54:30,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:54:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1526236185, now seen corresponding path program 5 times [2023-08-04 02:54:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:54:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539167744] [2023-08-04 02:54:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:54:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:54:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:54:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539167744] [2023-08-04 02:54:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539167744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:54:31,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:54:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:54:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526477941] [2023-08-04 02:54:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:54:31,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:54:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:54:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:54:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:54:31,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-04 02:54:31,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 1377 flow. Second operand has 5 states, 5 states have (on average 177.4) internal successors, (887), 5 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:31,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:54:31,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-04 02:54:31,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:54:40,433 INFO L124 PetriNetUnfolderBase]: 48258/75530 cut-off events. [2023-08-04 02:54:40,433 INFO L125 PetriNetUnfolderBase]: For 587905/593801 co-relation queries the response was YES. [2023-08-04 02:54:40,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361703 conditions, 75530 events. 48258/75530 cut-off events. For 587905/593801 co-relation queries the response was YES. Maximal size of possible extension queue 2585. Compared 614669 event pairs, 14568 based on Foata normal form. 5853/80523 useless extension candidates. Maximal degree in co-relation 361640. Up to 43934 conditions per place. [2023-08-04 02:54:41,419 INFO L140 encePairwiseOnDemand]: 398/403 looper letters, 201 selfloop transitions, 20 changer transitions 2/241 dead transitions. [2023-08-04 02:54:41,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 241 transitions, 2815 flow [2023-08-04 02:54:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:54:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:54:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 966 transitions. [2023-08-04 02:54:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794044665012407 [2023-08-04 02:54:41,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 966 transitions. [2023-08-04 02:54:41,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 966 transitions. [2023-08-04 02:54:41,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:54:41,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 966 transitions. [2023-08-04 02:54:41,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:41,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:41,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:41,429 INFO L175 Difference]: Start difference. First operand has 130 places, 122 transitions, 1377 flow. Second operand 5 states and 966 transitions. [2023-08-04 02:54:41,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 241 transitions, 2815 flow [2023-08-04 02:54:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 241 transitions, 2777 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-04 02:54:45,326 INFO L231 Difference]: Finished difference. Result has 135 places, 130 transitions, 1515 flow [2023-08-04 02:54:45,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1515, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2023-08-04 02:54:45,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2023-08-04 02:54:45,327 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 1515 flow [2023-08-04 02:54:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.4) internal successors, (887), 5 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:45,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:54:45,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:54:45,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-04 02:54:45,327 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:54:45,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:54:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 203940869, now seen corresponding path program 2 times [2023-08-04 02:54:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:54:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146078305] [2023-08-04 02:54:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:54:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:54:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:54:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146078305] [2023-08-04 02:54:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146078305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:54:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192054340] [2023-08-04 02:54:45,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:54:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:54:45,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:54:45,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:54:45,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 02:54:45,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:54:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:54:45,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:54:45,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:54:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:54:45,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:54:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:54:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192054340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:54:45,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:54:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 02:54:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696702757] [2023-08-04 02:54:45,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:54:45,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 02:54:45,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:54:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 02:54:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-04 02:54:45,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-04 02:54:45,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 1515 flow. Second operand has 10 states, 10 states have (on average 175.2) internal successors, (1752), 10 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:54:45,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:54:45,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-04 02:54:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:55:01,957 INFO L124 PetriNetUnfolderBase]: 76810/121531 cut-off events. [2023-08-04 02:55:01,957 INFO L125 PetriNetUnfolderBase]: For 1062445/1086361 co-relation queries the response was YES. [2023-08-04 02:55:03,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593278 conditions, 121531 events. 76810/121531 cut-off events. For 1062445/1086361 co-relation queries the response was YES. Maximal size of possible extension queue 4313. Compared 1085874 event pairs, 8888 based on Foata normal form. 18007/138717 useless extension candidates. Maximal degree in co-relation 593212. Up to 27125 conditions per place. [2023-08-04 02:55:03,546 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 444 selfloop transitions, 90 changer transitions 6/561 dead transitions. [2023-08-04 02:55:03,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 561 transitions, 7266 flow [2023-08-04 02:55:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 02:55:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 02:55:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2091 transitions. [2023-08-04 02:55:03,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716896007218588 [2023-08-04 02:55:03,548 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2091 transitions. [2023-08-04 02:55:03,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2091 transitions. [2023-08-04 02:55:03,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:55:03,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2091 transitions. [2023-08-04 02:55:03,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0909090909091) internal successors, (2091), 11 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:55:03,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 403.0) internal successors, (4836), 12 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) [2023-08-04 02:55:03,553 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 403.0) internal successors, (4836), 12 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) [2023-08-04 02:55:03,553 INFO L175 Difference]: Start difference. First operand has 135 places, 130 transitions, 1515 flow. Second operand 11 states and 2091 transitions. [2023-08-04 02:55:03,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 561 transitions, 7266 flow [2023-08-04 02:55:13,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 561 transitions, 7200 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-04 02:55:13,378 INFO L231 Difference]: Finished difference. Result has 150 places, 200 transitions, 2700 flow [2023-08-04 02:55:13,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2700, PETRI_PLACES=150, PETRI_TRANSITIONS=200} [2023-08-04 02:55:13,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2023-08-04 02:55:13,378 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 200 transitions, 2700 flow [2023-08-04 02:55:13,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.2) internal successors, (1752), 10 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:55:13,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:55:13,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:55:13,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 02:55:13,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:55:13,580 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:55:13,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:55:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1787018885, now seen corresponding path program 3 times [2023-08-04 02:55:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:55:13,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878542469] [2023-08-04 02:55:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:55:13,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:55:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:55:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:55:13,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:55:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878542469] [2023-08-04 02:55:13,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878542469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:55:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080770633] [2023-08-04 02:55:13,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:55:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:55:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:55:13,655 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:55:13,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 02:55:13,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-04 02:55:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:55:13,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-04 02:55:13,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:55:13,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-04 02:55:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 02:55:13,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:55:13,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-04 02:55:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 02:55:14,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080770633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:55:14,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:55:14,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 02:55:14,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132147157] [2023-08-04 02:55:14,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:55:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 02:55:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:55:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 02:55:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 02:55:14,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 403 [2023-08-04 02:55:14,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 200 transitions, 2700 flow. Second operand has 11 states, 11 states have (on average 162.27272727272728) internal successors, (1785), 11 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:55:14,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:55:14,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 403 [2023-08-04 02:55:14,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:56:06,921 INFO L124 PetriNetUnfolderBase]: 198477/319162 cut-off events. [2023-08-04 02:56:06,921 INFO L125 PetriNetUnfolderBase]: For 3142085/3163182 co-relation queries the response was YES. [2023-08-04 02:56:09,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1683466 conditions, 319162 events. 198477/319162 cut-off events. For 3142085/3163182 co-relation queries the response was YES. Maximal size of possible extension queue 10854. Compared 3236411 event pairs, 30199 based on Foata normal form. 16918/334845 useless extension candidates. Maximal degree in co-relation 1633378. Up to 69420 conditions per place. [2023-08-04 02:56:10,582 INFO L140 encePairwiseOnDemand]: 392/403 looper letters, 761 selfloop transitions, 257 changer transitions 92/1139 dead transitions. [2023-08-04 02:56:10,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1139 transitions, 15338 flow [2023-08-04 02:56:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 02:56:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 02:56:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3381 transitions. [2023-08-04 02:56:10,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155674546166906 [2023-08-04 02:56:10,586 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3381 transitions. [2023-08-04 02:56:10,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3381 transitions. [2023-08-04 02:56:10,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:56:10,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3381 transitions. [2023-08-04 02:56:10,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 177.94736842105263) internal successors, (3381), 19 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:56:10,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 403.0) internal successors, (8060), 20 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:56:10,593 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 403.0) internal successors, (8060), 20 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:56:10,593 INFO L175 Difference]: Start difference. First operand has 150 places, 200 transitions, 2700 flow. Second operand 19 states and 3381 transitions. [2023-08-04 02:56:10,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 1139 transitions, 15338 flow [2023-08-04 03:01:38,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1139 transitions, 15294 flow, removed 22 selfloop flow, removed 0 redundant places. [2023-08-04 03:01:38,287 INFO L231 Difference]: Finished difference. Result has 183 places, 424 transitions, 7100 flow [2023-08-04 03:01:38,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7100, PETRI_PLACES=183, PETRI_TRANSITIONS=424} [2023-08-04 03:01:38,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2023-08-04 03:01:38,288 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 424 transitions, 7100 flow [2023-08-04 03:01:38,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 162.27272727272728) internal successors, (1785), 11 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:01:38,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:01:38,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:01:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 03:01:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:01:38,489 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:01:38,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:01:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash -250117941, now seen corresponding path program 1 times [2023-08-04 03:01:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:01:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76363112] [2023-08-04 03:01:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:01:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:01:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:01:38,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:01:38,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76363112] [2023-08-04 03:01:38,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76363112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:01:38,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:01:38,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 03:01:38,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890222928] [2023-08-04 03:01:38,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:01:38,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:01:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:01:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:01:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:01:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-04 03:01:38,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 424 transitions, 7100 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:01:38,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:01:38,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-04 03:01:38,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand