/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_chl-time-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:33:47,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:33:47,733 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:33:47,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:33:47,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:33:47,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:33:47,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:33:47,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:33:47,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:33:47,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:33:47,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:33:47,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:33:47,774 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:33:47,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:33:47,774 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:33:47,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:33:47,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:33:47,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:33:47,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:33:47,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:33:47,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:33:47,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:33:47,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:33:47,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:33:47,781 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:33:47,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:33:47,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:33:47,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:33:47,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:33:47,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:33:47,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:33:47,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:33:47,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:33:47,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:33:47,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:33:47,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:33:47,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:33:47,784 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:33:47,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:33:47,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:33:47,785 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:33:47,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:33:48,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:33:48,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:33:48,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:33:48,023 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:33:48,025 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:33:48,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-time-symm.wvr_bound2.c [2023-08-04 08:33:49,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:33:49,364 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:33:49,365 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-time-symm.wvr_bound2.c [2023-08-04 08:33:49,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8787674b1/8fae86909c94460fb866aa351f64e1ed/FLAG0ab0d3cd6 [2023-08-04 08:33:49,382 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8787674b1/8fae86909c94460fb866aa351f64e1ed [2023-08-04 08:33:49,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:33:49,385 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:33:49,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:33:49,386 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:33:49,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:33:49,393 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5d11f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49, skipping insertion in model container [2023-08-04 08:33:49,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,413 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:33:49,567 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_chl-time-symm.wvr_bound2.c[2656,2669] [2023-08-04 08:33:49,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:33:49,577 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:33:49,596 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_chl-time-symm.wvr_bound2.c[2656,2669] [2023-08-04 08:33:49,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:33:49,605 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:33:49,606 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:33:49,611 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:33:49,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49 WrapperNode [2023-08-04 08:33:49,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:33:49,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:33:49,613 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:33:49,613 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:33:49,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,624 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,648 INFO L138 Inliner]: procedures = 22, calls = 29, calls flagged for inlining = 9, calls inlined = 15, statements flattened = 186 [2023-08-04 08:33:49,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:33:49,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:33:49,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:33:49,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:33:49,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,661 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:33:49,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:33:49,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:33:49,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:33:49,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (1/1) ... [2023-08-04 08:33:49,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:33:49,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:49,710 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 08:33:49,729 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 08:33:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:33:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:33:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:33:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:33:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:33:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:33:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:33:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:33:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:33:49,745 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 08:33:49,858 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:33:49,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:33:50,187 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:33:50,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:33:50,409 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 08:33:50,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:33:50 BoogieIcfgContainer [2023-08-04 08:33:50,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:33:50,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:33:50,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:33:50,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:33:50,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:33:49" (1/3) ... [2023-08-04 08:33:50,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:33:50, skipping insertion in model container [2023-08-04 08:33:50,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:49" (2/3) ... [2023-08-04 08:33:50,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:33:50, skipping insertion in model container [2023-08-04 08:33:50,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:33:50" (3/3) ... [2023-08-04 08:33:50,421 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-time-symm.wvr_bound2.c [2023-08-04 08:33:50,426 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:33:50,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:33:50,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:33:50,433 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:33:50,481 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:33:50,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 113 transitions, 248 flow [2023-08-04 08:33:50,611 INFO L124 PetriNetUnfolderBase]: 26/246 cut-off events. [2023-08-04 08:33:50,611 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:33:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 26/246 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 716 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-04 08:33:50,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 113 transitions, 248 flow [2023-08-04 08:33:50,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 103 transitions, 224 flow [2023-08-04 08:33:50,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:50,639 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 224 flow [2023-08-04 08:33:50,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 224 flow [2023-08-04 08:33:50,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 224 flow [2023-08-04 08:33:50,689 INFO L124 PetriNetUnfolderBase]: 26/211 cut-off events. [2023-08-04 08:33:50,690 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:33:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 211 events. 26/211 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2023-08-04 08:33:50,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 564 [2023-08-04 08:33:54,104 INFO L134 LiptonReduction]: Checked pairs total: 1197 [2023-08-04 08:33:54,104 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-04 08:33:54,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:33:54,121 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;@2a1f77b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:54,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:33:54,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:54,127 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 08:33:54,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:54,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:54,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:33:54,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:54,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash 597919233, now seen corresponding path program 1 times [2023-08-04 08:33:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050257112] [2023-08-04 08:33:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:54,298 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 08:33:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:54,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050257112] [2023-08-04 08:33:54,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050257112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:54,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:54,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115183307] [2023-08-04 08:33:54,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:54,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:54,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:54,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 202 [2023-08-04 08:33:54,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 08:33:54,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:54,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 202 [2023-08-04 08:33:54,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:54,461 INFO L124 PetriNetUnfolderBase]: 57/146 cut-off events. [2023-08-04 08:33:54,462 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:33:54,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 146 events. 57/146 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 500 event pairs, 21 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 212. Up to 133 conditions per place. [2023-08-04 08:33:54,464 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 20 selfloop transitions, 2 changer transitions 1/25 dead transitions. [2023-08-04 08:33:54,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 114 flow [2023-08-04 08:33:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-04 08:33:54,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099009900990099 [2023-08-04 08:33:54,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-04 08:33:54,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-04 08:33:54,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:54,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-04 08:33:54,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 08:33:54,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:54,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:54,490 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 64 flow. Second operand 3 states and 309 transitions. [2023-08-04 08:33:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 114 flow [2023-08-04 08:33:54,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:54,494 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 66 flow [2023-08-04 08:33:54,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-04 08:33:54,498 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-04 08:33:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 66 flow [2023-08-04 08:33:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 08:33:54,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:54,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:33:54,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:54,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1409890279, now seen corresponding path program 1 times [2023-08-04 08:33:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:54,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413229452] [2023-08-04 08:33:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:54,636 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 08:33:54,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413229452] [2023-08-04 08:33:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413229452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688225017] [2023-08-04 08:33:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:54,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:54,644 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 08:33:54,645 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 08:33:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:54,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:54,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:54,713 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 08:33:54,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688225017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:54,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:54,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458461087] [2023-08-04 08:33:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:54,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:54,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 202 [2023-08-04 08:33:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 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 08:33:54,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:54,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 202 [2023-08-04 08:33:54,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:54,798 INFO L124 PetriNetUnfolderBase]: 55/144 cut-off events. [2023-08-04 08:33:54,798 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:33:54,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 144 events. 55/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 400 event pairs, 24 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 154. Up to 123 conditions per place. [2023-08-04 08:33:54,800 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 21 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 08:33:54,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 120 flow [2023-08-04 08:33:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-04 08:33:54,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115511551155115 [2023-08-04 08:33:54,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-04 08:33:54,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-04 08:33:54,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:54,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-04 08:33:54,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 08:33:54,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:54,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:54,820 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 66 flow. Second operand 3 states and 310 transitions. [2023-08-04 08:33:54,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 120 flow [2023-08-04 08:33:54,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:54,822 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 70 flow [2023-08-04 08:33:54,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-04 08:33:54,822 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-04 08:33:54,823 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 70 flow [2023-08-04 08:33:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 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 08:33:54,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:54,837 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 08:33:55,033 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 08:33:55,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:55,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2114024025, now seen corresponding path program 1 times [2023-08-04 08:33:55,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:55,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592155338] [2023-08-04 08:33:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:55,134 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 08:33:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:55,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592155338] [2023-08-04 08:33:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592155338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339465226] [2023-08-04 08:33:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:55,141 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 08:33:55,143 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 08:33:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:55,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:55,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:55,209 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 08:33:55,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:55,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339465226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:55,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:55,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113527823] [2023-08-04 08:33:55,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:55,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 202 [2023-08-04 08:33:55,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 08:33:55,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:55,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 202 [2023-08-04 08:33:55,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:55,285 INFO L124 PetriNetUnfolderBase]: 37/106 cut-off events. [2023-08-04 08:33:55,285 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:33:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 106 events. 37/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 242 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 117. Up to 79 conditions per place. [2023-08-04 08:33:55,286 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 25 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 08:33:55,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 140 flow [2023-08-04 08:33:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-04 08:33:55,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165016501650165 [2023-08-04 08:33:55,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-04 08:33:55,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-04 08:33:55,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:55,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-04 08:33:55,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 08:33:55,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:55,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:55,293 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 70 flow. Second operand 3 states and 313 transitions. [2023-08-04 08:33:55,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 140 flow [2023-08-04 08:33:55,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:55,296 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 78 flow [2023-08-04 08:33:55,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-04 08:33:55,297 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-04 08:33:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 78 flow [2023-08-04 08:33:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 08:33:55,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:55,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:55,307 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 08:33:55,503 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 08:33:55,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:55,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 171896158, now seen corresponding path program 1 times [2023-08-04 08:33:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:55,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502890358] [2023-08-04 08:33:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:55,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:55,588 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 08:33:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502890358] [2023-08-04 08:33:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502890358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252335980] [2023-08-04 08:33:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:55,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:55,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:55,593 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 08:33:55,616 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 08:33:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:55,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:55,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:55,681 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 08:33:55,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252335980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:55,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:55,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:33:55,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864243215] [2023-08-04 08:33:55,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:55,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:55,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:55,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 202 [2023-08-04 08:33:55,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 08:33:55,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:55,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 202 [2023-08-04 08:33:55,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:55,757 INFO L124 PetriNetUnfolderBase]: 34/101 cut-off events. [2023-08-04 08:33:55,757 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:33:55,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 101 events. 34/101 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 29 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 122. Up to 80 conditions per place. [2023-08-04 08:33:55,764 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 21 selfloop transitions, 2 changer transitions 2/27 dead transitions. [2023-08-04 08:33:55,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 134 flow [2023-08-04 08:33:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-04 08:33:55,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115511551155115 [2023-08-04 08:33:55,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-04 08:33:55,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-04 08:33:55,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:55,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-04 08:33:55,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 08:33:55,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:55,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 08:33:55,773 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 78 flow. Second operand 3 states and 310 transitions. [2023-08-04 08:33:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 134 flow [2023-08-04 08:33:55,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:55,774 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 80 flow [2023-08-04 08:33:55,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-04 08:33:55,775 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2023-08-04 08:33:55,775 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 80 flow [2023-08-04 08:33:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 08:33:55,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:55,776 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 08:33:55,791 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 08:33:55,988 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 08:33:55,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:55,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1795129319, now seen corresponding path program 1 times [2023-08-04 08:33:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068303565] [2023-08-04 08:33:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:56,110 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 08:33:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:56,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068303565] [2023-08-04 08:33:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068303565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:56,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14545745] [2023-08-04 08:33:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:56,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:56,112 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 08:33:56,140 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 08:33:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:56,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:56,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:56,219 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 08:33:56,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:56,248 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 08:33:56,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14545745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:56,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:56,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:56,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010082962] [2023-08-04 08:33:56,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:56,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-04 08:33:56,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 08:33:56,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:56,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-04 08:33:56,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:56,280 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:33:56,280 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:56,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:33:56,281 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:33:56,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2023-08-04 08:33:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 384 transitions. [2023-08-04 08:33:56,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752475247524752 [2023-08-04 08:33:56,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 384 transitions. [2023-08-04 08:33:56,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 384 transitions. [2023-08-04 08:33:56,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:56,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 384 transitions. [2023-08-04 08:33:56,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 08:33:56,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 08:33:56,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 08:33:56,286 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 80 flow. Second operand 4 states and 384 transitions. [2023-08-04 08:33:56,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2023-08-04 08:33:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:56,287 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 08:33:56,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 08:33:56,289 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -9 predicate places. [2023-08-04 08:33:56,289 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 08:33:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 08:33:56,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:33:56,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:56,500 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 08:33:56,500 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:33:56,502 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:33:56,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 113 transitions, 248 flow [2023-08-04 08:33:56,524 INFO L124 PetriNetUnfolderBase]: 26/246 cut-off events. [2023-08-04 08:33:56,524 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:33:56,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 26/246 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 716 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-04 08:33:56,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 113 transitions, 248 flow [2023-08-04 08:33:56,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 73 transitions, 156 flow [2023-08-04 08:33:56,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:56,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 73 transitions, 156 flow [2023-08-04 08:33:56,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 73 transitions, 156 flow [2023-08-04 08:33:56,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 73 transitions, 156 flow [2023-08-04 08:33:56,533 INFO L124 PetriNetUnfolderBase]: 2/102 cut-off events. [2023-08-04 08:33:56,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:56,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 102 events. 2/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-04 08:33:56,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 222 [2023-08-04 08:33:59,584 INFO L134 LiptonReduction]: Checked pairs total: 149 [2023-08-04 08:33:59,584 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 08:33:59,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:33:59,586 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;@2a1f77b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:59,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:33:59,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:59,589 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-08-04 08:33:59,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:59,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:59,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:33:59,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:33:59,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash 660942917, now seen corresponding path program 1 times [2023-08-04 08:33:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:59,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662107326] [2023-08-04 08:33:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:59,626 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 08:33:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:59,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662107326] [2023-08-04 08:33:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662107326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:59,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071954008] [2023-08-04 08:33:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:59,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 178 [2023-08-04 08:33:59,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 08:33:59,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:59,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 178 [2023-08-04 08:33:59,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:59,667 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-04 08:33:59,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 33 events. 9/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 2 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 60. Up to 24 conditions per place. [2023-08-04 08:33:59,667 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 9 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-08-04 08:33:59,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 58 flow [2023-08-04 08:33:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-04 08:33:59,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561797752808989 [2023-08-04 08:33:59,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-04 08:33:59,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-04 08:33:59,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:59,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-04 08:33:59,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 08:33:59,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 08:33:59,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 08:33:59,673 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 32 flow. Second operand 3 states and 297 transitions. [2023-08-04 08:33:59,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 58 flow [2023-08-04 08:33:59,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:33:59,674 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 40 flow [2023-08-04 08:33:59,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-08-04 08:33:59,675 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, 3 predicate places. [2023-08-04 08:33:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 40 flow [2023-08-04 08:33:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 08:33:59,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:59,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:33:59,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:33:59,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:33:59,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash -996747881, now seen corresponding path program 1 times [2023-08-04 08:33:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:59,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962291362] [2023-08-04 08:33:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:59,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:33:59,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:33:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:33:59,722 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:33:59,722 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:33:59,723 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:33:59,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:33:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:33:59,723 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:33:59,724 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:33:59,724 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:33:59,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:33:59,757 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:33:59,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 298 flow [2023-08-04 08:33:59,824 INFO L124 PetriNetUnfolderBase]: 117/786 cut-off events. [2023-08-04 08:33:59,824 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:33:59,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 883 conditions, 786 events. 117/786 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3835 event pairs, 2 based on Foata normal form. 0/666 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-08-04 08:33:59,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 125 transitions, 298 flow [2023-08-04 08:33:59,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 115 transitions, 270 flow [2023-08-04 08:33:59,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:59,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 115 transitions, 270 flow [2023-08-04 08:33:59,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 115 transitions, 270 flow [2023-08-04 08:33:59,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 115 transitions, 270 flow [2023-08-04 08:33:59,909 INFO L124 PetriNetUnfolderBase]: 117/654 cut-off events. [2023-08-04 08:33:59,910 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-04 08:33:59,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 654 events. 117/654 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2799 event pairs, 2 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 393. Up to 32 conditions per place. [2023-08-04 08:33:59,915 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 08:34:04,090 INFO L134 LiptonReduction]: Checked pairs total: 3672 [2023-08-04 08:34:04,090 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-04 08:34:04,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:34:04,092 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;@2a1f77b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:34:04,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:34:04,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:34:04,094 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 08:34:04,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:34:04,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:04,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:34:04,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:04,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash 875621988, now seen corresponding path program 1 times [2023-08-04 08:34:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949133484] [2023-08-04 08:34:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:04,119 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 08:34:04,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949133484] [2023-08-04 08:34:04,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949133484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:04,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:34:04,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279988229] [2023-08-04 08:34:04,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:04,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:34:04,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 216 [2023-08-04 08:34:04,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 08:34:04,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:04,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 216 [2023-08-04 08:34:04,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:04,453 INFO L124 PetriNetUnfolderBase]: 1053/1865 cut-off events. [2023-08-04 08:34:04,454 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2023-08-04 08:34:04,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1865 events. 1053/1865 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9309 event pairs, 641 based on Foata normal form. 0/1653 useless extension candidates. Maximal degree in co-relation 1472. Up to 1725 conditions per place. [2023-08-04 08:34:04,462 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-04 08:34:04,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 176 flow [2023-08-04 08:34:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-08-04 08:34:04,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2023-08-04 08:34:04,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-08-04 08:34:04,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-08-04 08:34:04,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:04,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-08-04 08:34:04,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 08:34:04,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:04,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:04,469 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 106 flow. Second operand 3 states and 330 transitions. [2023-08-04 08:34:04,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 176 flow [2023-08-04 08:34:04,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:04,474 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 112 flow [2023-08-04 08:34:04,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-08-04 08:34:04,475 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2023-08-04 08:34:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 112 flow [2023-08-04 08:34:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 08:34:04,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:04,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:34:04,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:04,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -362730439, now seen corresponding path program 1 times [2023-08-04 08:34:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179776253] [2023-08-04 08:34:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:04,519 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 08:34:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179776253] [2023-08-04 08:34:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179776253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624507034] [2023-08-04 08:34:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:04,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:04,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:04,521 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 08:34:04,550 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 08:34:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:04,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:04,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:04,601 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 08:34:04,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:04,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624507034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:04,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:34:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752796075] [2023-08-04 08:34:04,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:04,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 216 [2023-08-04 08:34:04,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 08:34:04,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:04,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 216 [2023-08-04 08:34:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:04,908 INFO L124 PetriNetUnfolderBase]: 1047/1873 cut-off events. [2023-08-04 08:34:04,908 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-08-04 08:34:04,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 1873 events. 1047/1873 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9399 event pairs, 644 based on Foata normal form. 0/1675 useless extension candidates. Maximal degree in co-relation 3848. Up to 1679 conditions per place. [2023-08-04 08:34:04,918 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 08:34:04,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 192 flow [2023-08-04 08:34:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-04 08:34:04,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2023-08-04 08:34:04,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-04 08:34:04,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-04 08:34:04,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:04,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-04 08:34:04,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 08:34:04,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:04,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:04,923 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 112 flow. Second operand 3 states and 332 transitions. [2023-08-04 08:34:04,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 192 flow [2023-08-04 08:34:04,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:04,926 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 122 flow [2023-08-04 08:34:04,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-04 08:34:04,927 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 08:34:04,928 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 122 flow [2023-08-04 08:34:04,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 08:34:04,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:04,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:04,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:05,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:05,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 840423952, now seen corresponding path program 1 times [2023-08-04 08:34:05,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97158764] [2023-08-04 08:34:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:05,171 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 08:34:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97158764] [2023-08-04 08:34:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97158764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091339241] [2023-08-04 08:34:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:05,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:05,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:05,173 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 08:34:05,175 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 08:34:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:05,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:05,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:05,247 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 08:34:05,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091339241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:05,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:34:05,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763292035] [2023-08-04 08:34:05,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:05,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 216 [2023-08-04 08:34:05,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 08:34:05,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:05,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 216 [2023-08-04 08:34:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:05,558 INFO L124 PetriNetUnfolderBase]: 957/1759 cut-off events. [2023-08-04 08:34:05,558 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 08:34:05,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1759 events. 957/1759 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8870 event pairs, 620 based on Foata normal form. 0/1629 useless extension candidates. Maximal degree in co-relation 1684. Up to 1295 conditions per place. [2023-08-04 08:34:05,569 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 39 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 08:34:05,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 234 flow [2023-08-04 08:34:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-08-04 08:34:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200617283950617 [2023-08-04 08:34:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-08-04 08:34:05,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-08-04 08:34:05,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:05,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-08-04 08:34:05,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 08:34:05,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:05,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:05,574 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 122 flow. Second operand 3 states and 337 transitions. [2023-08-04 08:34:05,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 234 flow [2023-08-04 08:34:05,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:05,576 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 132 flow [2023-08-04 08:34:05,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-04 08:34:05,577 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 08:34:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 132 flow [2023-08-04 08:34:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 08:34:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:05,578 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 08:34:05,583 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 08:34:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:05,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:05,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 492180608, now seen corresponding path program 1 times [2023-08-04 08:34:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:05,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597755608] [2023-08-04 08:34:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:05,834 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 08:34:05,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597755608] [2023-08-04 08:34:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597755608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422743706] [2023-08-04 08:34:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:05,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:05,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:05,836 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 08:34:05,861 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 08:34:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:05,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:05,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:05,918 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 08:34:05,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:05,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422743706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:05,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:34:05,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946039451] [2023-08-04 08:34:05,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:05,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:05,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:05,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 216 [2023-08-04 08:34:05,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 08:34:05,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:05,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 216 [2023-08-04 08:34:05,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:06,234 INFO L124 PetriNetUnfolderBase]: 964/1818 cut-off events. [2023-08-04 08:34:06,235 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 08:34:06,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 1818 events. 964/1818 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9182 event pairs, 675 based on Foata normal form. 0/1785 useless extension candidates. Maximal degree in co-relation 1963. Up to 1281 conditions per place. [2023-08-04 08:34:06,243 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 40 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:34:06,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 246 flow [2023-08-04 08:34:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-08-04 08:34:06,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200617283950617 [2023-08-04 08:34:06,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-08-04 08:34:06,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-08-04 08:34:06,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:06,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-08-04 08:34:06,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 08:34:06,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:06,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 08:34:06,248 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 132 flow. Second operand 3 states and 337 transitions. [2023-08-04 08:34:06,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 246 flow [2023-08-04 08:34:06,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:06,250 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 142 flow [2023-08-04 08:34:06,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-04 08:34:06,252 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 08:34:06,252 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 142 flow [2023-08-04 08:34:06,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 08:34:06,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:06,252 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 08:34:06,260 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 08:34:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:06,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:06,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2142848241, now seen corresponding path program 1 times [2023-08-04 08:34:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501697461] [2023-08-04 08:34:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:06,506 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 08:34:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:06,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501697461] [2023-08-04 08:34:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501697461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:06,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106815515] [2023-08-04 08:34:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:06,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:06,507 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 08:34:06,510 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 08:34:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:06,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:06,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:06,619 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 08:34:06,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:06,636 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 08:34:06,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106815515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:06,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:34:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330815745] [2023-08-04 08:34:06,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:06,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:06,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:06,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-04 08:34:06,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 102.6) internal successors, (513), 5 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 08:34:06,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:06,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-04 08:34:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:06,941 INFO L124 PetriNetUnfolderBase]: 862/1622 cut-off events. [2023-08-04 08:34:06,941 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 08:34:06,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 1622 events. 862/1622 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8050 event pairs, 387 based on Foata normal form. 2/1624 useless extension candidates. Maximal degree in co-relation 2162. Up to 1465 conditions per place. [2023-08-04 08:34:06,948 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 34 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-08-04 08:34:06,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2023-08-04 08:34:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-08-04 08:34:06,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-08-04 08:34:06,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-08-04 08:34:06,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-08-04 08:34:06,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:06,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-08-04 08:34:06,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 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 08:34:06,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:06,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:06,954 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 142 flow. Second operand 4 states and 428 transitions. [2023-08-04 08:34:06,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2023-08-04 08:34:06,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:06,960 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 154 flow [2023-08-04 08:34:06,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 08:34:06,961 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-04 08:34:06,961 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 154 flow [2023-08-04 08:34:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.6) internal successors, (513), 5 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 08:34:06,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:06,961 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 08:34:06,969 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 08:34:07,167 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,SelfDestructingSolverStorable11 [2023-08-04 08:34:07,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:07,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:07,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2122721807, now seen corresponding path program 1 times [2023-08-04 08:34:07,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:07,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675958583] [2023-08-04 08:34:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:07,220 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 08:34:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675958583] [2023-08-04 08:34:07,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675958583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309490432] [2023-08-04 08:34:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:07,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:07,222 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 08:34:07,225 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 08:34:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:07,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:07,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:07,318 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 08:34:07,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:07,332 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 08:34:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309490432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:07,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:34:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339998015] [2023-08-04 08:34:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:07,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-04 08:34:07,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 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 08:34:07,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:07,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-04 08:34:07,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:07,601 INFO L124 PetriNetUnfolderBase]: 810/1526 cut-off events. [2023-08-04 08:34:07,601 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 08:34:07,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 1526 events. 810/1526 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7225 event pairs, 364 based on Foata normal form. 8/1534 useless extension candidates. Maximal degree in co-relation 2191. Up to 1245 conditions per place. [2023-08-04 08:34:07,609 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 38 selfloop transitions, 3 changer transitions 1/46 dead transitions. [2023-08-04 08:34:07,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 256 flow [2023-08-04 08:34:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-08-04 08:34:07,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 08:34:07,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-08-04 08:34:07,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-08-04 08:34:07,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:07,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-08-04 08:34:07,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:07,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:07,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:07,615 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 154 flow. Second operand 4 states and 432 transitions. [2023-08-04 08:34:07,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 256 flow [2023-08-04 08:34:07,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 247 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:07,620 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 159 flow [2023-08-04 08:34:07,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-08-04 08:34:07,621 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-08-04 08:34:07,621 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 159 flow [2023-08-04 08:34:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 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 08:34:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:07,621 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 08:34:07,630 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 08:34:07,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:34:07,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:07,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1976731863, now seen corresponding path program 1 times [2023-08-04 08:34:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754158825] [2023-08-04 08:34:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:07,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:07,912 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 08:34:07,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:07,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754158825] [2023-08-04 08:34:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754158825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306197470] [2023-08-04 08:34:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:07,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:07,914 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 08:34:07,923 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 08:34:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:08,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:08,017 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 08:34:08,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:08,032 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 08:34:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306197470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:08,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:34:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639321119] [2023-08-04 08:34:08,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:08,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-04 08:34:08,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 08:34:08,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:08,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-04 08:34:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:08,252 INFO L124 PetriNetUnfolderBase]: 534/1034 cut-off events. [2023-08-04 08:34:08,252 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 08:34:08,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1034 events. 534/1034 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4317 event pairs, 215 based on Foata normal form. 32/1066 useless extension candidates. Maximal degree in co-relation 1905. Up to 444 conditions per place. [2023-08-04 08:34:08,257 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 43 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-04 08:34:08,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 290 flow [2023-08-04 08:34:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-04 08:34:08,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057870370370371 [2023-08-04 08:34:08,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:08,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 08:34:08,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:08,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:08,263 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 159 flow. Second operand 4 states and 437 transitions. [2023-08-04 08:34:08,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 290 flow [2023-08-04 08:34:08,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 280 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:08,266 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 170 flow [2023-08-04 08:34:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-04 08:34:08,267 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-08-04 08:34:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 170 flow [2023-08-04 08:34:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 08:34:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:08,268 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 08:34:08,277 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 08:34:08,473 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,SelfDestructingSolverStorable13 [2023-08-04 08:34:08,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:08,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1591949613, now seen corresponding path program 1 times [2023-08-04 08:34:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:08,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683529501] [2023-08-04 08:34:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,539 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 08:34:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683529501] [2023-08-04 08:34:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683529501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335846672] [2023-08-04 08:34:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:08,541 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 08:34:08,544 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 08:34:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:08,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:08,650 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 08:34:08,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:08,663 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 08:34:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335846672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:08,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:08,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:34:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567598165] [2023-08-04 08:34:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:08,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-04 08:34:08,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 103.4) internal successors, (517), 5 states have internal predecessors, (517), 0 states have call successors, (0), 0 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 08:34:08,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:08,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-04 08:34:08,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:08,898 INFO L124 PetriNetUnfolderBase]: 530/1023 cut-off events. [2023-08-04 08:34:08,898 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 08:34:08,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1023 events. 530/1023 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4235 event pairs, 439 based on Foata normal form. 9/1032 useless extension candidates. Maximal degree in co-relation 2086. Up to 749 conditions per place. [2023-08-04 08:34:08,903 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 43 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2023-08-04 08:34:08,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 302 flow [2023-08-04 08:34:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-04 08:34:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057870370370371 [2023-08-04 08:34:08,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:08,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-04 08:34:08,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 08:34:08,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:08,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:08,910 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 170 flow. Second operand 4 states and 437 transitions. [2023-08-04 08:34:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 302 flow [2023-08-04 08:34:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 298 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:08,913 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 174 flow [2023-08-04 08:34:08,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-04 08:34:08,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-04 08:34:08,915 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 174 flow [2023-08-04 08:34:08,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.4) internal successors, (517), 5 states have internal predecessors, (517), 0 states have call successors, (0), 0 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 08:34:08,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:08,915 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 08:34:08,923 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 08:34:09,120 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,SelfDestructingSolverStorable14 [2023-08-04 08:34:09,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:09,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1687145646, now seen corresponding path program 1 times [2023-08-04 08:34:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:09,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551712797] [2023-08-04 08:34:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:34:10,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:10,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551712797] [2023-08-04 08:34:10,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551712797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:10,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875398] [2023-08-04 08:34:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:10,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:10,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:10,126 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 08:34:10,135 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 08:34:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:34:10,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:34:10,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:34:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:12,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:12,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 7 [2023-08-04 08:34:12,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400269292] [2023-08-04 08:34:12,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:12,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:34:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:34:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:34:12,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 216 [2023-08-04 08:34:12,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 97.875) internal successors, (783), 8 states have internal predecessors, (783), 0 states have call successors, (0), 0 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 08:34:12,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:12,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 216 [2023-08-04 08:34:12,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:12,758 INFO L124 PetriNetUnfolderBase]: 725/1389 cut-off events. [2023-08-04 08:34:12,758 INFO L125 PetriNetUnfolderBase]: For 1106/1106 co-relation queries the response was YES. [2023-08-04 08:34:12,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3636 conditions, 1389 events. 725/1389 cut-off events. For 1106/1106 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6926 event pairs, 108 based on Foata normal form. 1/1382 useless extension candidates. Maximal degree in co-relation 3529. Up to 670 conditions per place. [2023-08-04 08:34:12,763 INFO L140 encePairwiseOnDemand]: 211/216 looper letters, 42 selfloop transitions, 2 changer transitions 35/83 dead transitions. [2023-08-04 08:34:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 559 flow [2023-08-04 08:34:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-08-04 08:34:12,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2023-08-04 08:34:12,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-08-04 08:34:12,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-08-04 08:34:12,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:12,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-08-04 08:34:12,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 08:34:12,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:12,768 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:12,769 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 174 flow. Second operand 4 states and 434 transitions. [2023-08-04 08:34:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 559 flow [2023-08-04 08:34:12,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 539 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:12,776 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 188 flow [2023-08-04 08:34:12,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-04 08:34:12,777 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-08-04 08:34:12,777 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 188 flow [2023-08-04 08:34:12,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.875) internal successors, (783), 8 states have internal predecessors, (783), 0 states have call successors, (0), 0 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 08:34:12,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:12,778 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 08:34:12,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:12,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:34:12,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:12,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash -69880598, now seen corresponding path program 2 times [2023-08-04 08:34:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:12,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909157952] [2023-08-04 08:34:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:34:13,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:13,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909157952] [2023-08-04 08:34:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909157952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:13,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:13,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:34:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118515345] [2023-08-04 08:34:13,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:13,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:34:13,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:34:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:34:13,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 216 [2023-08-04 08:34:13,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 08:34:13,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:13,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 216 [2023-08-04 08:34:13,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:13,899 INFO L124 PetriNetUnfolderBase]: 286/677 cut-off events. [2023-08-04 08:34:13,899 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-08-04 08:34:13,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 677 events. 286/677 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3188 event pairs, 79 based on Foata normal form. 1/673 useless extension candidates. Maximal degree in co-relation 2140. Up to 443 conditions per place. [2023-08-04 08:34:13,902 INFO L140 encePairwiseOnDemand]: 211/216 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-04 08:34:13,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 466 flow [2023-08-04 08:34:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-08-04 08:34:13,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849537037037037 [2023-08-04 08:34:13,903 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-08-04 08:34:13,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-08-04 08:34:13,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:13,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-08-04 08:34:13,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 08:34:13,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:13,906 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 08:34:13,906 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 188 flow. Second operand 4 states and 419 transitions. [2023-08-04 08:34:13,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 466 flow [2023-08-04 08:34:13,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 456 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:13,909 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-04 08:34:13,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-04 08:34:13,910 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-04 08:34:13,910 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-04 08:34:13,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 08:34:13,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:34:13,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:34:13,910 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:13,911 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:34:13,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 298 flow [2023-08-04 08:34:13,960 INFO L124 PetriNetUnfolderBase]: 117/786 cut-off events. [2023-08-04 08:34:13,960 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:34:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 883 conditions, 786 events. 117/786 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3835 event pairs, 2 based on Foata normal form. 0/666 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-08-04 08:34:13,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 125 transitions, 298 flow [2023-08-04 08:34:13,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 81 transitions, 186 flow [2023-08-04 08:34:13,962 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:34:13,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 81 transitions, 186 flow [2023-08-04 08:34:13,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 81 transitions, 186 flow [2023-08-04 08:34:13,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 81 transitions, 186 flow [2023-08-04 08:34:13,973 INFO L124 PetriNetUnfolderBase]: 3/175 cut-off events. [2023-08-04 08:34:13,974 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:34:13,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 175 events. 3/175 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 281 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 146. Up to 9 conditions per place. [2023-08-04 08:34:13,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-04 08:34:17,957 INFO L134 LiptonReduction]: Checked pairs total: 614 [2023-08-04 08:34:17,958 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-04 08:34:17,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:34:17,959 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;@2a1f77b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:34:17,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:34:17,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:34:17,962 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 08:34:17,963 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:34:17,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:17,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:34:17,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:34:17,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 453620154, now seen corresponding path program 1 times [2023-08-04 08:34:17,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:17,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318888246] [2023-08-04 08:34:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:17,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318888246] [2023-08-04 08:34:17,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318888246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:17,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:17,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:34:17,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025419837] [2023-08-04 08:34:17,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:17,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:34:17,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 192 [2023-08-04 08:34:17,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 08:34:17,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:17,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 192 [2023-08-04 08:34:17,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:18,044 INFO L124 PetriNetUnfolderBase]: 119/250 cut-off events. [2023-08-04 08:34:18,044 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 08:34:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 250 events. 119/250 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 72 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 224. Up to 214 conditions per place. [2023-08-04 08:34:18,045 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-04 08:34:18,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 96 flow [2023-08-04 08:34:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-04 08:34:18,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2023-08-04 08:34:18,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-04 08:34:18,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-04 08:34:18,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:18,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-04 08:34:18,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 08:34:18,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 08:34:18,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 08:34:18,049 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 58 flow. Second operand 3 states and 314 transitions. [2023-08-04 08:34:18,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 96 flow [2023-08-04 08:34:18,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 92 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 08:34:18,050 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 66 flow [2023-08-04 08:34:18,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-04 08:34:18,051 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-04 08:34:18,051 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 66 flow [2023-08-04 08:34:18,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 08:34:18,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:18,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:34:18,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:34:18,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:34:18,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2013643596, now seen corresponding path program 1 times [2023-08-04 08:34:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:18,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110024859] [2023-08-04 08:34:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:34:18,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110024859] [2023-08-04 08:34:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110024859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240040732] [2023-08-04 08:34:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:18,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:18,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:18,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:18,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:34:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:18,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:34:18,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:34:18,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240040732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:18,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:18,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:34:18,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307257002] [2023-08-04 08:34:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:18,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:34:18,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 192 [2023-08-04 08:34:18,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 08:34:18,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:18,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 192 [2023-08-04 08:34:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:18,275 INFO L124 PetriNetUnfolderBase]: 115/242 cut-off events. [2023-08-04 08:34:18,275 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 08:34:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 242 events. 115/242 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 872 event pairs, 42 based on Foata normal form. 4/246 useless extension candidates. Maximal degree in co-relation 302. Up to 193 conditions per place. [2023-08-04 08:34:18,277 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 15 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-04 08:34:18,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 112 flow [2023-08-04 08:34:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:34:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:34:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-08-04 08:34:18,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-04 08:34:18,279 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-08-04 08:34:18,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-08-04 08:34:18,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:18,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-08-04 08:34:18,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 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 08:34:18,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:18,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:18,282 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 66 flow. Second operand 5 states and 510 transitions. [2023-08-04 08:34:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 112 flow [2023-08-04 08:34:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:18,283 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 80 flow [2023-08-04 08:34:18,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-04 08:34:18,283 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-08-04 08:34:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 80 flow [2023-08-04 08:34:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 08:34:18,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:18,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:18,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:18,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:18,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:34:18,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1341376206, now seen corresponding path program 1 times [2023-08-04 08:34:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:18,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510293248] [2023-08-04 08:34:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510293248] [2023-08-04 08:34:18,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510293248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120237752] [2023-08-04 08:34:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:18,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:18,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:18,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:34:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:18,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:18,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:18,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120237752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:18,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:34:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083566942] [2023-08-04 08:34:18,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:18,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:18,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 192 [2023-08-04 08:34:18,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:18,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:18,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 192 [2023-08-04 08:34:18,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:18,696 INFO L124 PetriNetUnfolderBase]: 88/179 cut-off events. [2023-08-04 08:34:18,697 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 08:34:18,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 179 events. 88/179 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 543 event pairs, 28 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 215. Up to 141 conditions per place. [2023-08-04 08:34:18,698 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 15 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-04 08:34:18,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 118 flow [2023-08-04 08:34:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-08-04 08:34:18,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53515625 [2023-08-04 08:34:18,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-08-04 08:34:18,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-08-04 08:34:18,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:18,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-08-04 08:34:18,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 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 08:34:18,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 08:34:18,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 08:34:18,703 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 80 flow. Second operand 4 states and 411 transitions. [2023-08-04 08:34:18,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 118 flow [2023-08-04 08:34:18,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 113 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:18,703 INFO L231 Difference]: Finished difference. Result has 33 places, 17 transitions, 73 flow [2023-08-04 08:34:18,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2023-08-04 08:34:18,704 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-04 08:34:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 73 flow [2023-08-04 08:34:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:18,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:18,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:18,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:18,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:34:18,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1110842205, now seen corresponding path program 1 times [2023-08-04 08:34:18,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059797721] [2023-08-04 08:34:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:34:18,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:18,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059797721] [2023-08-04 08:34:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059797721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:18,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:18,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:34:18,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237261417] [2023-08-04 08:34:18,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:18,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:34:18,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:34:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:34:18,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 192 [2023-08-04 08:34:18,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 08:34:18,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:18,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 192 [2023-08-04 08:34:18,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:18,998 INFO L124 PetriNetUnfolderBase]: 56/123 cut-off events. [2023-08-04 08:34:18,998 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 08:34:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 123 events. 56/123 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 320 event pairs, 8 based on Foata normal form. 16/139 useless extension candidates. Maximal degree in co-relation 190. Up to 60 conditions per place. [2023-08-04 08:34:18,999 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 08:34:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 117 flow [2023-08-04 08:34:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-04 08:34:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403645833333334 [2023-08-04 08:34:19,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-04 08:34:19,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-04 08:34:19,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:19,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-04 08:34:19,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 08:34:19,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 08:34:19,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 08:34:19,004 INFO L175 Difference]: Start difference. First operand has 33 places, 17 transitions, 73 flow. Second operand 4 states and 415 transitions. [2023-08-04 08:34:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 117 flow [2023-08-04 08:34:19,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:19,005 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 08:34:19,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 08:34:19,005 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-04 08:34:19,005 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 08:34:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 08:34:19,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:34:19,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:34:19,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:34:19,010 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 08:34:19,010 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (2/2) [2023-08-04 08:34:19,010 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:34:19,010 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:34:19,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:34:19 BasicIcfg [2023-08-04 08:34:19,016 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:34:19,016 INFO L158 Benchmark]: Toolchain (without parser) took 29631.35ms. Allocated memory was 411.0MB in the beginning and 715.1MB in the end (delta: 304.1MB). Free memory was 365.8MB in the beginning and 572.2MB in the end (delta: -206.3MB). Peak memory consumption was 99.6MB. Max. memory is 16.0GB. [2023-08-04 08:34:19,017 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 339.7MB. Free memory was 296.3MB in the beginning and 296.1MB in the end (delta: 154.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:34:19,018 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.60ms. Allocated memory is still 411.0MB. Free memory was 365.8MB in the beginning and 354.2MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:34:19,019 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.12ms. Allocated memory is still 411.0MB. Free memory was 354.2MB in the beginning and 352.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:34:19,019 INFO L158 Benchmark]: Boogie Preprocessor took 25.69ms. Allocated memory is still 411.0MB. Free memory was 352.2MB in the beginning and 350.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:34:19,019 INFO L158 Benchmark]: RCFGBuilder took 733.58ms. Allocated memory is still 411.0MB. Free memory was 350.9MB in the beginning and 299.7MB in the end (delta: 51.2MB). Peak memory consumption was 52.4MB. Max. memory is 16.0GB. [2023-08-04 08:34:19,020 INFO L158 Benchmark]: TraceAbstraction took 28602.67ms. Allocated memory was 411.0MB in the beginning and 715.1MB in the end (delta: 304.1MB). Free memory was 298.9MB in the beginning and 572.2MB in the end (delta: -273.3MB). Peak memory consumption was 32.5MB. Max. memory is 16.0GB. [2023-08-04 08:34:19,021 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 339.7MB. Free memory was 296.3MB in the beginning and 296.1MB in the end (delta: 154.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 225.60ms. Allocated memory is still 411.0MB. Free memory was 365.8MB in the beginning and 354.2MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.12ms. Allocated memory is still 411.0MB. Free memory was 354.2MB in the beginning and 352.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.69ms. Allocated memory is still 411.0MB. Free memory was 352.2MB in the beginning and 350.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 733.58ms. Allocated memory is still 411.0MB. Free memory was 350.9MB in the beginning and 299.7MB in the end (delta: 51.2MB). Peak memory consumption was 52.4MB. Max. memory is 16.0GB. * TraceAbstraction took 28602.67ms. Allocated memory was 411.0MB in the beginning and 715.1MB in the end (delta: 304.1MB). Free memory was 298.9MB in the beginning and 572.2MB in the end (delta: -273.3MB). Peak memory consumption was 32.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 99 PlacesBefore, 24 PlacesAfterwards, 103 TransitionsBefore, 23 TransitionsAfterwards, 564 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 89 TotalNumberOfCompositions, 1197 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 845, independent: 818, independent conditional: 0, independent unconditional: 818, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 329, independent: 319, independent conditional: 0, independent unconditional: 319, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 845, independent: 499, independent conditional: 0, independent unconditional: 499, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 329, unknown conditional: 0, unknown unconditional: 329] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 22, Positive conditional cache size: 0, Positive unconditional cache size: 22, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 77 PlacesBefore, 16 PlacesAfterwards, 73 TransitionsBefore, 11 TransitionsAfterwards, 222 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 65 TotalNumberOfCompositions, 149 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 149, independent: 149, independent conditional: 0, independent unconditional: 149, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 108, independent: 108, independent conditional: 0, independent unconditional: 108, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 149, independent: 41, independent conditional: 0, independent unconditional: 41, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 108, unknown conditional: 0, unknown unconditional: 108] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 111 PlacesBefore, 34 PlacesAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 91 TotalNumberOfCompositions, 3672 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3041, independent: 2989, independent conditional: 0, independent unconditional: 2989, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 755, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3041, independent: 2246, independent conditional: 0, independent unconditional: 2246, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 755, unknown conditional: 0, unknown unconditional: 755] , Statistics on independence cache: Total cache size (in pairs): 82, Positive cache size: 80, Positive conditional cache size: 0, Positive unconditional cache size: 80, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 89 PlacesBefore, 26 PlacesAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 67 TotalNumberOfCompositions, 614 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 523, independent: 515, independent conditional: 0, independent unconditional: 515, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 300, independent: 296, independent conditional: 0, independent unconditional: 296, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 523, independent: 219, independent conditional: 0, independent unconditional: 219, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 300, unknown conditional: 0, unknown unconditional: 300] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 80]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.0s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 232 IncrementalHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 23 mSDtfsCounter, 232 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 424 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 121 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.2s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 297 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 219 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 976 IncrementalHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 22 mSDtfsCounter, 976 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 378 GetRequests, 337 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=9, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 442 NumberOfCodeBlocks, 442 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 577 ConstructedInterpolants, 0 QuantifiedInterpolants, 3799 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1094 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 214/235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.2s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 121 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 96 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175 IncrementalHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 1 mSDtfsCounter, 175 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 206 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 42/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:34:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...