/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:52:11,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:52:11,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:52:11,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:52:11,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:52:11,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:52:11,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:52:11,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:52:11,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:52:11,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:52:11,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:52:11,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:52:11,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:52:11,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:52:11,855 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:52:11,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:52:11,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:52:11,856 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:52:11,856 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:52:11,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:52:11,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:52:11,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:52:11,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:52:11,865 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:52:11,867 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:52:11,867 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:52:11,867 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:52:11,868 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:52:11,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:52:11,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:52:11,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:52:11,869 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:52:11,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:52:11,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:52:11,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:52:11,871 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:52:11,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:52:12,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:52:12,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:52:12,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:52:12,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:52:12,131 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:52:12,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 08:52:13,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:52:13,379 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:52:13,379 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 08:52:13,386 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17affdae/1107229bf42a4b5cb8a94abf652f8dd4/FLAG802c1c67e [2023-08-04 08:52:13,401 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17affdae/1107229bf42a4b5cb8a94abf652f8dd4 [2023-08-04 08:52:13,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:52:13,407 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:52:13,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:52:13,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:52:13,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:52:13,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7e4649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13, skipping insertion in model container [2023-08-04 08:52:13,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,437 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:52:13,578 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_parallel-misc-3.wvr_bound2.c[2572,2585] [2023-08-04 08:52:13,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:52:13,587 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:52:13,605 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_parallel-misc-3.wvr_bound2.c[2572,2585] [2023-08-04 08:52:13,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:52:13,615 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:52:13,615 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:52:13,621 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:52:13,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13 WrapperNode [2023-08-04 08:52:13,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:52:13,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:52:13,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:52:13,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:52:13,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,647 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-08-04 08:52:13,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:52:13,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:52:13,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:52:13,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:52:13,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,661 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:52:13,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:52:13,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:52:13,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:52:13,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (1/1) ... [2023-08-04 08:52:13,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:52:13,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:13,702 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 08:52:13,707 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 08:52:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:52:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:52:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:52:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:52:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:52:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:52:13,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:52:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:52:13,732 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 08:52:13,803 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:52:13,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:52:13,976 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:52:13,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:52:13,999 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:52:14,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:52:14 BoogieIcfgContainer [2023-08-04 08:52:14,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:52:14,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:52:14,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:52:14,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:52:14,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:52:13" (1/3) ... [2023-08-04 08:52:14,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13565366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:52:14, skipping insertion in model container [2023-08-04 08:52:14,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:52:13" (2/3) ... [2023-08-04 08:52:14,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13565366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:52:14, skipping insertion in model container [2023-08-04 08:52:14,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:52:14" (3/3) ... [2023-08-04 08:52:14,014 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 08:52:14,021 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:52:14,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:52:14,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:52:14,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:52:14,116 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:52:14,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,288 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 08:52:14,288 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:52:14,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 08:52:14,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:52:14,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:14,377 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 08:52:14,377 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:52:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 08:52:14,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 4608 [2023-08-04 08:52:17,145 INFO L134 LiptonReduction]: Checked pairs total: 4475 [2023-08-04 08:52:17,145 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 08:52:17,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:52:17,171 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;@29dd0936, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:52:17,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:52:17,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:52:17,175 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 08:52:17,175 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:52:17,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:17,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:52:17,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:17,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 483006427, now seen corresponding path program 1 times [2023-08-04 08:52:17,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:17,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875760456] [2023-08-04 08:52:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:17,327 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 08:52:17,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:17,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875760456] [2023-08-04 08:52:17,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875760456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:17,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:52:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596716853] [2023-08-04 08:52:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:17,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:52:17,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 233 [2023-08-04 08:52:17,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 08:52:17,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:17,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 233 [2023-08-04 08:52:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:17,431 INFO L124 PetriNetUnfolderBase]: 108/203 cut-off events. [2023-08-04 08:52:17,431 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:52:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 203 events. 108/203 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 588 event pairs, 21 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 308. Up to 183 conditions per place. [2023-08-04 08:52:17,433 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 23 selfloop transitions, 2 changer transitions 3/30 dead transitions. [2023-08-04 08:52:17,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 134 flow [2023-08-04 08:52:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-04 08:52:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47782546494992845 [2023-08-04 08:52:17,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-04 08:52:17,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-04 08:52:17,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:17,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-04 08:52:17,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 08:52:17,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:17,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:17,457 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 78 flow. Second operand 3 states and 334 transitions. [2023-08-04 08:52:17,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 134 flow [2023-08-04 08:52:17,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:52:17,461 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 76 flow [2023-08-04 08:52:17,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 08:52:17,465 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 08:52:17,465 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 76 flow [2023-08-04 08:52:17,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 08:52:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:17,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:52:17,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:17,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 963928898, now seen corresponding path program 1 times [2023-08-04 08:52:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917706586] [2023-08-04 08:52:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:17,554 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 08:52:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917706586] [2023-08-04 08:52:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917706586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98077553] [2023-08-04 08:52:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:17,565 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 08:52:17,590 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 08:52:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:17,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:17,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:17,646 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 08:52:17,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98077553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759777130] [2023-08-04 08:52:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:17,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:17,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 233 [2023-08-04 08:52:17,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 08:52:17,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:17,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 233 [2023-08-04 08:52:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:17,731 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-08-04 08:52:17,731 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 08:52:17,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 195 events. 106/195 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 447 event pairs, 24 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 302. Up to 168 conditions per place. [2023-08-04 08:52:17,732 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 25 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 08:52:17,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 142 flow [2023-08-04 08:52:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 08:52:17,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4792560801144492 [2023-08-04 08:52:17,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 08:52:17,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 08:52:17,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:17,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 08:52:17,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 08:52:17,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:17,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:17,739 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 76 flow. Second operand 3 states and 335 transitions. [2023-08-04 08:52:17,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 142 flow [2023-08-04 08:52:17,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:52:17,741 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 74 flow [2023-08-04 08:52:17,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-04 08:52:17,742 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-08-04 08:52:17,742 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 74 flow [2023-08-04 08:52:17,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 08:52:17,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:17,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:17,751 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 08:52:17,949 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 08:52:17,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:17,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1374397269, now seen corresponding path program 1 times [2023-08-04 08:52:17,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:17,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455493408] [2023-08-04 08:52:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,042 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 08:52:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455493408] [2023-08-04 08:52:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455493408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119459599] [2023-08-04 08:52:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:18,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:18,050 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 08:52:18,052 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 08:52:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:18,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:18,118 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 08:52:18,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119459599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:18,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:18,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504375790] [2023-08-04 08:52:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 233 [2023-08-04 08:52:18,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 08:52:18,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:18,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 233 [2023-08-04 08:52:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:18,200 INFO L124 PetriNetUnfolderBase]: 74/143 cut-off events. [2023-08-04 08:52:18,200 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:52:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 143 events. 74/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 280 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 139. Up to 106 conditions per place. [2023-08-04 08:52:18,202 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-04 08:52:18,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 156 flow [2023-08-04 08:52:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-04 08:52:18,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48354792560801146 [2023-08-04 08:52:18,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-04 08:52:18,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-04 08:52:18,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:18,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-04 08:52:18,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 08:52:18,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,211 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 74 flow. Second operand 3 states and 338 transitions. [2023-08-04 08:52:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 156 flow [2023-08-04 08:52:18,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:52:18,214 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 82 flow [2023-08-04 08:52:18,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-04 08:52:18,215 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-04 08:52:18,215 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 82 flow [2023-08-04 08:52:18,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 08:52:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:18,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:18,227 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 08:52:18,421 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,SelfDestructingSolverStorable2 [2023-08-04 08:52:18,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:18,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1840908504, now seen corresponding path program 1 times [2023-08-04 08:52:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913335893] [2023-08-04 08:52:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,497 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 08:52:18,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:18,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913335893] [2023-08-04 08:52:18,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913335893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487080154] [2023-08-04 08:52:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:18,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:18,501 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 08:52:18,515 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 08:52:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:18,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:18,573 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 08:52:18,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:18,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487080154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:18,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:18,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:52:18,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590048472] [2023-08-04 08:52:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:18,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:18,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:18,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 233 [2023-08-04 08:52:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 08:52:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 233 [2023-08-04 08:52:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:18,644 INFO L124 PetriNetUnfolderBase]: 69/136 cut-off events. [2023-08-04 08:52:18,645 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:52:18,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 136 events. 69/136 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 250 event pairs, 29 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 142. Up to 111 conditions per place. [2023-08-04 08:52:18,648 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 25 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-04 08:52:18,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 150 flow [2023-08-04 08:52:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 08:52:18,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4792560801144492 [2023-08-04 08:52:18,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 08:52:18,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 08:52:18,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:18,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 08:52:18,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 08:52:18,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,662 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 82 flow. Second operand 3 states and 335 transitions. [2023-08-04 08:52:18,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 150 flow [2023-08-04 08:52:18,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:18,663 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 84 flow [2023-08-04 08:52:18,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 08:52:18,664 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 08:52:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 84 flow [2023-08-04 08:52:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 08:52:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:18,665 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 08:52:18,673 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 08:52:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:18,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:18,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -195019900, now seen corresponding path program 1 times [2023-08-04 08:52:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:18,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001071758] [2023-08-04 08:52:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,944 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 08:52:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001071758] [2023-08-04 08:52:18,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001071758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152958180] [2023-08-04 08:52:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:18,946 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 08:52:18,949 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 08:52:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:19,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:19,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:19,044 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 08:52:19,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:19,073 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 08:52:19,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152958180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:19,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:19,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:52:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129065585] [2023-08-04 08:52:19,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:19,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:19,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 233 [2023-08-04 08:52:19,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 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 08:52:19,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:19,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 233 [2023-08-04 08:52:19,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:19,122 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 08:52:19,122 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:52:19,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 08:52:19,123 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 08:52:19,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 9 transitions, 40 flow [2023-08-04 08:52:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-08-04 08:52:19,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44420600858369097 [2023-08-04 08:52:19,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-08-04 08:52:19,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-08-04 08:52:19,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:19,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-08-04 08:52:19,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:19,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 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 08:52:19,129 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 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 08:52:19,129 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 84 flow. Second operand 4 states and 414 transitions. [2023-08-04 08:52:19,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 9 transitions, 40 flow [2023-08-04 08:52:19,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:19,129 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 08:52:19,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 08:52:19,130 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -12 predicate places. [2023-08-04 08:52:19,130 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 08:52:19,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 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 08:52:19,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:52:19,145 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 08:52:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:19,338 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:52:19,340 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:52:19,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,362 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 08:52:19,362 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:52:19,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 08:52:19,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:52:19,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 08:52:19,382 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 08:52:19,382 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:52:19,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 08:52:19,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 4608 [2023-08-04 08:52:21,877 INFO L134 LiptonReduction]: Checked pairs total: 4596 [2023-08-04 08:52:21,877 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 08:52:21,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:52:21,881 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;@29dd0936, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:52:21,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:52:21,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:52:21,884 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-08-04 08:52:21,884 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:52:21,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:21,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:52:21,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:52:21,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1148633395, now seen corresponding path program 1 times [2023-08-04 08:52:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:21,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066228881] [2023-08-04 08:52:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:52:21,905 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:52:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:52:21,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:52:21,933 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:52:21,935 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:52:21,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:52:21,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:52:21,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:52:21,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:52:21,940 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:52:21,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:52:21,966 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:52:21,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,042 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 08:52:22,042 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:52:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 08:52:22,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:52:22,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 08:52:22,126 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 08:52:22,126 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:52:22,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 08:52:22,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 12528 [2023-08-04 08:52:24,065 INFO L134 LiptonReduction]: Checked pairs total: 44197 [2023-08-04 08:52:24,065 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 08:52:24,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:52:24,068 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;@29dd0936, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:52:24,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:52:24,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:52:24,069 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 08:52:24,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:52:24,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:24,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:52:24,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:24,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 891540290, now seen corresponding path program 1 times [2023-08-04 08:52:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:24,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841766308] [2023-08-04 08:52:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:24,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:24,096 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 08:52:24,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:24,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841766308] [2023-08-04 08:52:24,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841766308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:24,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:24,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:52:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27638825] [2023-08-04 08:52:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:52:24,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 08:52:24,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 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 08:52:24,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 08:52:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:25,435 INFO L124 PetriNetUnfolderBase]: 15063/19492 cut-off events. [2023-08-04 08:52:25,436 INFO L125 PetriNetUnfolderBase]: For 1210/1210 co-relation queries the response was YES. [2023-08-04 08:52:25,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39037 conditions, 19492 events. 15063/19492 cut-off events. For 1210/1210 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 100643 event pairs, 5055 based on Foata normal form. 0/14933 useless extension candidates. Maximal degree in co-relation 9742. Up to 18313 conditions per place. [2023-08-04 08:52:25,655 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 51 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 08:52:25,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 312 flow [2023-08-04 08:52:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 08:52:25,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553939393939394 [2023-08-04 08:52:25,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 08:52:25,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 08:52:25,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:25,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 08:52:25,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 08:52:25,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:25,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:25,661 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 192 flow. Second operand 3 states and 457 transitions. [2023-08-04 08:52:25,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 312 flow [2023-08-04 08:52:25,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:52:25,668 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 196 flow [2023-08-04 08:52:25,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 08:52:25,670 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 08:52:25,670 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 196 flow [2023-08-04 08:52:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 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 08:52:25,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:25,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:52:25,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:25,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 730169687, now seen corresponding path program 1 times [2023-08-04 08:52:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:25,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145688820] [2023-08-04 08:52:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:25,715 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 08:52:25,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145688820] [2023-08-04 08:52:25,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145688820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657087423] [2023-08-04 08:52:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:25,717 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 08:52:25,740 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 08:52:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:25,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:25,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:25,789 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 08:52:25,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:25,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657087423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:25,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:25,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755409202] [2023-08-04 08:52:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:25,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:25,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 08:52:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 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 08:52:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 08:52:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:27,078 INFO L124 PetriNetUnfolderBase]: 15047/19518 cut-off events. [2023-08-04 08:52:27,078 INFO L125 PetriNetUnfolderBase]: For 1025/1025 co-relation queries the response was YES. [2023-08-04 08:52:27,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39066 conditions, 19518 events. 15047/19518 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 102389 event pairs, 5353 based on Foata normal form. 0/15019 useless extension candidates. Maximal degree in co-relation 22271. Up to 17892 conditions per place. [2023-08-04 08:52:27,207 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 62 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 08:52:27,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 360 flow [2023-08-04 08:52:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 08:52:27,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648484848484848 [2023-08-04 08:52:27,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 08:52:27,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 08:52:27,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:27,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 08:52:27,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 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 08:52:27,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:27,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:27,213 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 196 flow. Second operand 3 states and 466 transitions. [2023-08-04 08:52:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 360 flow [2023-08-04 08:52:27,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:52:27,217 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 203 flow [2023-08-04 08:52:27,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 08:52:27,217 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 08:52:27,217 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 203 flow [2023-08-04 08:52:27,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 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 08:52:27,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:27,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:27,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:52:27,423 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 08:52:27,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:27,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1897150258, now seen corresponding path program 1 times [2023-08-04 08:52:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:27,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633578346] [2023-08-04 08:52:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:27,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:27,467 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 08:52:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:27,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633578346] [2023-08-04 08:52:27,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633578346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:27,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075251770] [2023-08-04 08:52:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:27,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:27,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:27,471 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 08:52:27,497 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 08:52:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:27,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:27,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:27,551 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 08:52:27,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075251770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217573413] [2023-08-04 08:52:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:27,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 08:52:27,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 08:52:27,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:27,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 08:52:27,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:28,553 INFO L124 PetriNetUnfolderBase]: 12667/16698 cut-off events. [2023-08-04 08:52:28,553 INFO L125 PetriNetUnfolderBase]: For 1111/1111 co-relation queries the response was YES. [2023-08-04 08:52:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33991 conditions, 16698 events. 12667/16698 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 88380 event pairs, 4360 based on Foata normal form. 0/13312 useless extension candidates. Maximal degree in co-relation 7874. Up to 11538 conditions per place. [2023-08-04 08:52:28,635 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 71 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 08:52:28,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 412 flow [2023-08-04 08:52:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 08:52:28,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745454545454546 [2023-08-04 08:52:28,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 08:52:28,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 08:52:28,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:28,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 08:52:28,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 08:52:28,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:28,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:28,640 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 203 flow. Second operand 3 states and 474 transitions. [2023-08-04 08:52:28,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 412 flow [2023-08-04 08:52:28,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:28,644 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 213 flow [2023-08-04 08:52:28,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 08:52:28,644 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 08:52:28,645 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 213 flow [2023-08-04 08:52:28,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 08:52:28,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:28,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:28,659 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 08:52:28,859 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 08:52:28,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:28,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1704198307, now seen corresponding path program 1 times [2023-08-04 08:52:28,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927294751] [2023-08-04 08:52:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:28,896 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 08:52:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927294751] [2023-08-04 08:52:28,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927294751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268536251] [2023-08-04 08:52:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:28,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:28,898 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 08:52:28,900 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 08:52:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:28,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:28,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:28,962 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 08:52:28,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268536251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:28,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:52:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023555165] [2023-08-04 08:52:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:28,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:28,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:28,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 08:52:28,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 08:52:28,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:28,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 08:52:28,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:29,922 INFO L124 PetriNetUnfolderBase]: 12385/16454 cut-off events. [2023-08-04 08:52:29,922 INFO L125 PetriNetUnfolderBase]: For 2082/2082 co-relation queries the response was YES. [2023-08-04 08:52:29,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34531 conditions, 16454 events. 12385/16454 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 87424 event pairs, 4928 based on Foata normal form. 0/13462 useless extension candidates. Maximal degree in co-relation 10558. Up to 12503 conditions per place. [2023-08-04 08:52:30,008 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 72 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 08:52:30,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 424 flow [2023-08-04 08:52:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 08:52:30,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745454545454546 [2023-08-04 08:52:30,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 08:52:30,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 08:52:30,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:30,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 08:52:30,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 08:52:30,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:30,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:30,014 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 213 flow. Second operand 3 states and 474 transitions. [2023-08-04 08:52:30,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 424 flow [2023-08-04 08:52:30,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:30,036 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 223 flow [2023-08-04 08:52:30,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 08:52:30,037 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 08:52:30,037 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 223 flow [2023-08-04 08:52:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 08:52:30,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:30,038 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] [2023-08-04 08:52:30,046 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 08:52:30,245 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 08:52:30,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:30,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1755744910, now seen corresponding path program 1 times [2023-08-04 08:52:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494516761] [2023-08-04 08:52:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:30,286 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 08:52:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494516761] [2023-08-04 08:52:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494516761] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216533292] [2023-08-04 08:52:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:30,288 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 08:52:30,316 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 08:52:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:30,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:30,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:30,373 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 08:52:30,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:30,387 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 08:52:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216533292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:30,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:30,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:52:30,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548915333] [2023-08-04 08:52:30,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:30,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:30,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:30,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:30,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 08:52:30,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 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 08:52:30,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:30,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 08:52:30,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:31,206 INFO L124 PetriNetUnfolderBase]: 11361/15006 cut-off events. [2023-08-04 08:52:31,207 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 08:52:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 15006 events. 11361/15006 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78266 event pairs, 2363 based on Foata normal form. 4/12415 useless extension candidates. Maximal degree in co-relation 22946. Up to 13894 conditions per place. [2023-08-04 08:52:31,260 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 65 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2023-08-04 08:52:31,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 401 flow [2023-08-04 08:52:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 08:52:31,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445454545454546 [2023-08-04 08:52:31,262 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 08:52:31,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 08:52:31,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:31,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 08:52:31,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 08:52:31,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:31,265 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:31,265 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 223 flow. Second operand 4 states and 599 transitions. [2023-08-04 08:52:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 401 flow [2023-08-04 08:52:31,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:31,300 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 235 flow [2023-08-04 08:52:31,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2023-08-04 08:52:31,301 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 08:52:31,301 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 235 flow [2023-08-04 08:52:31,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 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 08:52:31,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:31,301 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] [2023-08-04 08:52:31,306 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 08:52:31,504 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 08:52:31,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:31,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 836244348, now seen corresponding path program 1 times [2023-08-04 08:52:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:31,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579570684] [2023-08-04 08:52:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:31,553 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 08:52:31,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579570684] [2023-08-04 08:52:31,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579570684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175572736] [2023-08-04 08:52:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:31,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:31,555 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 08:52:31,575 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 08:52:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:31,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:31,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:31,635 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 08:52:31,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:31,647 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 08:52:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175572736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:31,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:31,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:52:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338374002] [2023-08-04 08:52:31,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 08:52:31,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 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 08:52:31,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:31,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 08:52:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:32,515 INFO L124 PetriNetUnfolderBase]: 10741/14194 cut-off events. [2023-08-04 08:52:32,516 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 08:52:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29999 conditions, 14194 events. 10741/14194 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 73336 event pairs, 2964 based on Foata normal form. 48/11845 useless extension candidates. Maximal degree in co-relation 21245. Up to 10579 conditions per place. [2023-08-04 08:52:32,700 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 83 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2023-08-04 08:52:32,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 485 flow [2023-08-04 08:52:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-04 08:52:32,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609090909090909 [2023-08-04 08:52:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-04 08:52:32,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-04 08:52:32,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:32,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-04 08:52:32,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 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 08:52:32,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:32,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:32,706 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 235 flow. Second operand 4 states and 617 transitions. [2023-08-04 08:52:32,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 485 flow [2023-08-04 08:52:32,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 476 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:52:32,725 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 246 flow [2023-08-04 08:52:32,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-04 08:52:32,726 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-04 08:52:32,726 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 246 flow [2023-08-04 08:52:32,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 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 08:52:32,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:32,727 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] [2023-08-04 08:52:32,734 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 08:52:32,932 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 08:52:32,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:32,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1357685016, now seen corresponding path program 1 times [2023-08-04 08:52:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:32,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38411298] [2023-08-04 08:52:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:32,970 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 08:52:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38411298] [2023-08-04 08:52:32,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38411298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473374123] [2023-08-04 08:52:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:32,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:32,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:32,972 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 08:52:32,975 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 08:52:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:33,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:33,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:33,060 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 08:52:33,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:33,076 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 08:52:33,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473374123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:33,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:33,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:52:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513174739] [2023-08-04 08:52:33,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:33,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:33,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 08:52:33,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 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 08:52:33,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:33,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 08:52:33,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:33,674 INFO L124 PetriNetUnfolderBase]: 8342/11114 cut-off events. [2023-08-04 08:52:33,674 INFO L125 PetriNetUnfolderBase]: For 2552/2552 co-relation queries the response was YES. [2023-08-04 08:52:33,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 11114 events. 8342/11114 cut-off events. For 2552/2552 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55441 event pairs, 1945 based on Foata normal form. 168/9333 useless extension candidates. Maximal degree in co-relation 22140. Up to 4918 conditions per place. [2023-08-04 08:52:33,738 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-04 08:52:33,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 540 flow [2023-08-04 08:52:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-04 08:52:33,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 08:52:33,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-04 08:52:33,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-04 08:52:33,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:33,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-04 08:52:33,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 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 08:52:33,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:33,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:33,745 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 246 flow. Second operand 4 states and 625 transitions. [2023-08-04 08:52:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 540 flow [2023-08-04 08:52:33,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 536 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:33,762 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 262 flow [2023-08-04 08:52:33,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-08-04 08:52:33,763 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 16 predicate places. [2023-08-04 08:52:33,763 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 262 flow [2023-08-04 08:52:33,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 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 08:52:33,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:33,764 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] [2023-08-04 08:52:33,780 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 08:52:33,975 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 08:52:33,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:33,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 827134512, now seen corresponding path program 1 times [2023-08-04 08:52:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309954684] [2023-08-04 08:52:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:34,038 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 08:52:34,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309954684] [2023-08-04 08:52:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309954684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256654055] [2023-08-04 08:52:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:34,041 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 08:52:34,064 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 08:52:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:34,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:34,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:34,135 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 08:52:34,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:34,149 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 08:52:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256654055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:34,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:34,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:52:34,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172191945] [2023-08-04 08:52:34,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:34,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 08:52:34,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 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 08:52:34,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:34,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 08:52:34,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:34,753 INFO L124 PetriNetUnfolderBase]: 8322/11081 cut-off events. [2023-08-04 08:52:34,754 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2023-08-04 08:52:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24999 conditions, 11081 events. 8322/11081 cut-off events. For 3736/3736 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55476 event pairs, 3834 based on Foata normal form. 15/9103 useless extension candidates. Maximal degree in co-relation 23100. Up to 9420 conditions per place. [2023-08-04 08:52:34,826 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 93 selfloop transitions, 3 changer transitions 1/122 dead transitions. [2023-08-04 08:52:34,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 558 flow [2023-08-04 08:52:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-04 08:52:34,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 08:52:34,828 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-04 08:52:34,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-04 08:52:34,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:34,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-04 08:52:34,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 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 08:52:34,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:34,832 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:34,832 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 262 flow. Second operand 4 states and 625 transitions. [2023-08-04 08:52:34,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 558 flow [2023-08-04 08:52:34,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 554 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:34,857 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 272 flow [2023-08-04 08:52:34,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2023-08-04 08:52:34,858 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2023-08-04 08:52:34,858 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 272 flow [2023-08-04 08:52:34,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 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 08:52:34,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:34,859 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] [2023-08-04 08:52:34,864 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 08:52:35,063 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,SelfDestructingSolverStorable13 [2023-08-04 08:52:35,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:35,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -301482166, now seen corresponding path program 1 times [2023-08-04 08:52:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188567505] [2023-08-04 08:52:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:52:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188567505] [2023-08-04 08:52:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188567505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:35,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:35,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:52:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754225094] [2023-08-04 08:52:35,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:35,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:52:35,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 275 [2023-08-04 08:52:35,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 08:52:35,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:35,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 275 [2023-08-04 08:52:35,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:35,918 INFO L124 PetriNetUnfolderBase]: 12070/16266 cut-off events. [2023-08-04 08:52:35,918 INFO L125 PetriNetUnfolderBase]: For 6375/6375 co-relation queries the response was YES. [2023-08-04 08:52:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35941 conditions, 16266 events. 12070/16266 cut-off events. For 6375/6375 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 89425 event pairs, 2129 based on Foata normal form. 489/13570 useless extension candidates. Maximal degree in co-relation 35719. Up to 10678 conditions per place. [2023-08-04 08:52:36,010 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 85 selfloop transitions, 3 changer transitions 1/114 dead transitions. [2023-08-04 08:52:36,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 607 flow [2023-08-04 08:52:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 08:52:36,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576969696969697 [2023-08-04 08:52:36,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 08:52:36,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 08:52:36,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:36,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 08:52:36,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:36,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:36,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:36,015 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 272 flow. Second operand 3 states and 476 transitions. [2023-08-04 08:52:36,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 607 flow [2023-08-04 08:52:36,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 599 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:52:36,044 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 287 flow [2023-08-04 08:52:36,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-04 08:52:36,044 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 21 predicate places. [2023-08-04 08:52:36,044 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 287 flow [2023-08-04 08:52:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 08:52:36,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:36,045 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 08:52:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 08:52:36,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:36,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 824485065, now seen corresponding path program 1 times [2023-08-04 08:52:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507318215] [2023-08-04 08:52:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:52:36,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507318215] [2023-08-04 08:52:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507318215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:52:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348068265] [2023-08-04 08:52:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:52:36,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 275 [2023-08-04 08:52:36,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 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 08:52:36,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:36,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 275 [2023-08-04 08:52:36,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:37,602 INFO L124 PetriNetUnfolderBase]: 16637/22862 cut-off events. [2023-08-04 08:52:37,602 INFO L125 PetriNetUnfolderBase]: For 10169/10169 co-relation queries the response was YES. [2023-08-04 08:52:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52061 conditions, 22862 events. 16637/22862 cut-off events. For 10169/10169 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 130295 event pairs, 2568 based on Foata normal form. 691/18884 useless extension candidates. Maximal degree in co-relation 51832. Up to 14929 conditions per place. [2023-08-04 08:52:37,766 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 84 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2023-08-04 08:52:37,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 597 flow [2023-08-04 08:52:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 08:52:37,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709090909090909 [2023-08-04 08:52:37,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 08:52:37,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 08:52:37,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:37,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 08:52:37,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 08:52:37,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:37,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:37,772 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 287 flow. Second operand 3 states and 471 transitions. [2023-08-04 08:52:37,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 597 flow [2023-08-04 08:52:37,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:37,817 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 305 flow [2023-08-04 08:52:37,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-04 08:52:37,817 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 23 predicate places. [2023-08-04 08:52:37,817 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 305 flow [2023-08-04 08:52:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 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 08:52:37,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:37,818 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, 1, 1, 1] [2023-08-04 08:52:37,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:52:37,818 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:37,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash 537253982, now seen corresponding path program 1 times [2023-08-04 08:52:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:37,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297265136] [2023-08-04 08:52:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:52:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297265136] [2023-08-04 08:52:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297265136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:37,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:52:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827678509] [2023-08-04 08:52:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:37,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:52:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 275 [2023-08-04 08:52:37,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 08:52:37,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:37,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 275 [2023-08-04 08:52:37,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:41,579 INFO L124 PetriNetUnfolderBase]: 43566/55994 cut-off events. [2023-08-04 08:52:41,579 INFO L125 PetriNetUnfolderBase]: For 33484/33484 co-relation queries the response was YES. [2023-08-04 08:52:41,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136358 conditions, 55994 events. 43566/55994 cut-off events. For 33484/33484 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 300029 event pairs, 5350 based on Foata normal form. 383/48250 useless extension candidates. Maximal degree in co-relation 136072. Up to 50521 conditions per place. [2023-08-04 08:52:41,956 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 84 selfloop transitions, 3 changer transitions 3/110 dead transitions. [2023-08-04 08:52:41,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 609 flow [2023-08-04 08:52:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 08:52:41,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2023-08-04 08:52:41,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 08:52:41,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 08:52:41,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:41,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 08:52:41,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 08:52:41,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:41,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 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 08:52:41,960 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 305 flow. Second operand 3 states and 465 transitions. [2023-08-04 08:52:41,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 609 flow [2023-08-04 08:52:42,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:42,005 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 317 flow [2023-08-04 08:52:42,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-08-04 08:52:42,006 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2023-08-04 08:52:42,006 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 317 flow [2023-08-04 08:52:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 08:52:42,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:42,006 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, 1, 1, 1] [2023-08-04 08:52:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:52:42,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:42,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 200593138, now seen corresponding path program 1 times [2023-08-04 08:52:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84000536] [2023-08-04 08:52:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:52:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84000536] [2023-08-04 08:52:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84000536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:52:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872121970] [2023-08-04 08:52:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:52:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:52:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:52:42,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-04 08:52:42,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 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 08:52:42,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:42,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-04 08:52:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:53,589 INFO L124 PetriNetUnfolderBase]: 117150/158647 cut-off events. [2023-08-04 08:52:53,589 INFO L125 PetriNetUnfolderBase]: For 97498/97498 co-relation queries the response was YES. [2023-08-04 08:52:54,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389215 conditions, 158647 events. 117150/158647 cut-off events. For 97498/97498 co-relation queries the response was YES. Maximal size of possible extension queue 5166. Compared 1122250 event pairs, 33563 based on Foata normal form. 0/128401 useless extension candidates. Maximal degree in co-relation 388602. Up to 74115 conditions per place. [2023-08-04 08:52:54,966 INFO L140 encePairwiseOnDemand]: 266/275 looper letters, 109 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-08-04 08:52:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 134 transitions, 779 flow [2023-08-04 08:52:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 08:52:54,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490909090909091 [2023-08-04 08:52:54,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 08:52:54,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 08:52:54,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:54,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 08:52:54,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 08:52:54,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:54,972 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:52:54,972 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 317 flow. Second operand 4 states and 604 transitions. [2023-08-04 08:52:54,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 134 transitions, 779 flow [2023-08-04 08:52:56,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 770 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:52:56,230 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 346 flow [2023-08-04 08:52:56,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-04 08:52:56,230 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2023-08-04 08:52:56,230 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 346 flow [2023-08-04 08:52:56,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 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 08:52:56,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:56,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2023-08-04 08:52:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:52:56,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:56,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash -525413462, now seen corresponding path program 1 times [2023-08-04 08:52:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:56,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868744551] [2023-08-04 08:52:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:52:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868744551] [2023-08-04 08:52:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868744551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:56,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:56,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:52:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299380220] [2023-08-04 08:52:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:56,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:52:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:52:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:52:56,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-04 08:52:56,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 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 08:52:56,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:56,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-04 08:52:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:53:35,157 INFO L124 PetriNetUnfolderBase]: 369230/509376 cut-off events. [2023-08-04 08:53:35,158 INFO L125 PetriNetUnfolderBase]: For 446892/477556 co-relation queries the response was YES. [2023-08-04 08:53:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337792 conditions, 509376 events. 369230/509376 cut-off events. For 446892/477556 co-relation queries the response was YES. Maximal size of possible extension queue 13545. Compared 4124287 event pairs, 116284 based on Foata normal form. 45896/525857 useless extension candidates. Maximal degree in co-relation 1336383. Up to 254343 conditions per place. [2023-08-04 08:53:39,206 INFO L140 encePairwiseOnDemand]: 266/275 looper letters, 103 selfloop transitions, 7 changer transitions 0/130 dead transitions. [2023-08-04 08:53:39,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 770 flow [2023-08-04 08:53:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:53:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:53:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 08:53:39,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445454545454546 [2023-08-04 08:53:39,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 08:53:39,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 08:53:39,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:53:39,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 08:53:39,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 08:53:39,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:53:39,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 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 08:53:39,211 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 346 flow. Second operand 4 states and 599 transitions. [2023-08-04 08:53:39,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 770 flow [2023-08-04 08:53:44,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:53:44,149 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 392 flow [2023-08-04 08:53:44,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2023-08-04 08:53:44,149 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 31 predicate places. [2023-08-04 08:53:44,149 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 392 flow [2023-08-04 08:53:44,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 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 08:53:44,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:53:44,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-08-04 08:53:44,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 08:53:44,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:53:44,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:53:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash 39232389, now seen corresponding path program 1 times [2023-08-04 08:53:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:53:44,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641756212] [2023-08-04 08:53:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:53:44,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:53:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:53:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:53:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:53:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641756212] [2023-08-04 08:53:44,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641756212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:53:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416852703] [2023-08-04 08:53:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:53:44,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:53:44,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:53:44,389 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 08:53:44,412 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 08:53:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:53:44,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 08:53:44,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:53:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:53:44,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:53:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:53:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416852703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:53:44,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:53:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 08:53:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113455954] [2023-08-04 08:53:44,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:53:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:53:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:53:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:53:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:53:44,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 08:53:44,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 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 08:53:44,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:53:44,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 08:53:44,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:46,632 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([798] L75-->L76-1: Formula: (not (= (mod v_~d2~0_99 256) 0)) InVars {~d2~0=v_~d2~0_99} OutVars{thread2Thread2of2ForFork1_#t~nondet4=|v_thread2Thread2of2ForFork1_#t~nondet4_13|, ~d2~0=v_~d2~0_99} AuxVars[] AssignedVars[thread2Thread2of2ForFork1_#t~nondet4][148], [Black: 283#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 992#(= ~g1~0 1), Black: 584#true, 1014#(not (= (* (div ~d2~0 256) 256) ~d2~0)), 587#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 423#(<= |ULTIMATE.start_main_~asdf~1#1| 1), thread2Thread1of2ForFork1InUse, 63#L54-2true, 53#L97-3true, 1008#(<= ~d1~0 (* 256 (div ~d1~0 256))), 997#(= ~g2~0 1), 108#L75true, thread1Thread1of2ForFork0InUse, Black: 1002#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 170#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 1007#(not (= (* 256 (div ~d1~0 256)) ~d1~0)), Black: 145#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 420#true, Black: 277#(<= |ULTIMATE.start_main_~asdf~3#1| 0), Black: 1015#(<= ~d2~0 (* (div ~d2~0 256) 256)), Black: 775#(<= |ULTIMATE.start_main_~asdf~3#1| 1), Black: 216#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 126#L76-1true, 1019#true]) [2023-08-04 08:55:46,632 INFO L294 olderBase$Statistics]: this new event has 60 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([865] L75-->L76-2: Formula: (and (not (= (mod |v_thread2Thread1of2ForFork1_#t~nondet4_19| 256) 0)) (not (= (mod v_~d2~0_105 256) 0))) InVars {~d2~0=v_~d2~0_105} OutVars{thread2Thread1of2ForFork1_#t~nondet4=|v_thread2Thread1of2ForFork1_#t~nondet4_19|, ~d2~0=v_~d2~0_105} AuxVars[] AssignedVars[thread2Thread1of2ForFork1_#t~nondet4][147], [Black: 283#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 992#(= ~g1~0 1), Black: 584#true, 1014#(not (= (* (div ~d2~0 256) 256) ~d2~0)), 587#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 423#(<= |ULTIMATE.start_main_~asdf~1#1| 1), thread2Thread1of2ForFork1InUse, 88#L76-2true, 63#L54-2true, 6#L75true, 53#L97-3true, 1008#(<= ~d1~0 (* 256 (div ~d1~0 256))), 997#(= ~g2~0 1), thread1Thread1of2ForFork0InUse, Black: 1002#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 170#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 1007#(not (= (* 256 (div ~d1~0 256)) ~d1~0)), Black: 145#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 420#true, Black: 277#(<= |ULTIMATE.start_main_~asdf~3#1| 0), Black: 1015#(<= ~d2~0 (* (div ~d2~0 256) 256)), Black: 775#(<= |ULTIMATE.start_main_~asdf~3#1| 1), Black: 216#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 1019#true]) [2023-08-04 08:55:46,632 INFO L294 olderBase$Statistics]: this new event has 60 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 08:55:46,632 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 08:55:46,633 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event