/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:47:11,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:47:11,924 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:47:11,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:47:11,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:47:11,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:47:11,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:47:11,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:47:11,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:47:11,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:47:11,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:47:11,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:47:11,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:47:11,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:47:11,978 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:47:11,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:47:11,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:47:11,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:47:11,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:47:11,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:47:11,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:47:11,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:47:11,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:47:11,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:47:11,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:47:11,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:47:11,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:47:11,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:47:11,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:47:11,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:47:11,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:47:11,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:47:11,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:47:11,984 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:47:11,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:47:11,985 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:47:11,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:47:12,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:47:12,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:47:12,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:47:12,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:47:12,221 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:47:12,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c [2023-08-04 08:47:13,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:47:13,568 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:47:13,568 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c [2023-08-04 08:47:13,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c823fc27f/82eed37e660f411e804d271a8ff064e2/FLAG1ffe3271c [2023-08-04 08:47:13,588 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c823fc27f/82eed37e660f411e804d271a8ff064e2 [2023-08-04 08:47:13,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:47:13,591 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:47:13,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:47:13,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:47:13,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:47:13,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc36ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13, skipping insertion in model container [2023-08-04 08:47:13,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,624 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:47:13,744 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c[2414,2427] [2023-08-04 08:47:13,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:47:13,752 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:47:13,770 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c[2414,2427] [2023-08-04 08:47:13,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:47:13,778 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:47:13,778 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:47:13,783 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:47:13,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13 WrapperNode [2023-08-04 08:47:13,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:47:13,785 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:47:13,785 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:47:13,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:47:13,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,814 INFO L138 Inliner]: procedures = 20, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 104 [2023-08-04 08:47:13,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:47:13,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:47:13,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:47:13,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:47:13,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,824 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,824 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:47:13,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:47:13,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:47:13,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:47:13,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (1/1) ... [2023-08-04 08:47:13,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:47:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:13,870 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 08:47:13,881 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 08:47:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:47:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:47:13,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:47:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:47:13,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:47:13,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:47:13,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:47:13,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:47:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:47:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:47:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:47:13,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:47:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:47:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:47:13,912 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 08:47:14,022 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:47:14,024 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:47:14,217 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:47:14,261 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:47:14,261 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:47:14,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:47:14 BoogieIcfgContainer [2023-08-04 08:47:14,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:47:14,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:47:14,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:47:14,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:47:14,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:47:13" (1/3) ... [2023-08-04 08:47:14,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53246c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:47:14, skipping insertion in model container [2023-08-04 08:47:14,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:13" (2/3) ... [2023-08-04 08:47:14,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53246c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:47:14, skipping insertion in model container [2023-08-04 08:47:14,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:47:14" (3/3) ... [2023-08-04 08:47:14,270 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-2-unrolled-atomic.wvr_bound2.c [2023-08-04 08:47:14,276 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:47:14,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:47:14,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:47:14,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:47:14,354 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:47:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,470 INFO L124 PetriNetUnfolderBase]: 34/257 cut-off events. [2023-08-04 08:47:14,471 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:47:14,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 257 events. 34/257 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 740 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2023-08-04 08:47:14,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:14,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:14,568 INFO L124 PetriNetUnfolderBase]: 34/257 cut-off events. [2023-08-04 08:47:14,568 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:47:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 257 events. 34/257 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 740 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2023-08-04 08:47:14,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 1392 [2023-08-04 08:47:17,489 INFO L134 LiptonReduction]: Checked pairs total: 2094 [2023-08-04 08:47:17,489 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-04 08:47:17,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:17,508 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;@59dfdd64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:17,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:17,512 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:17,512 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-04 08:47:17,512 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:17,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:17,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:47:17,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 473424744, now seen corresponding path program 1 times [2023-08-04 08:47:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:17,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304420882] [2023-08-04 08:47:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:17,681 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 08:47:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304420882] [2023-08-04 08:47:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304420882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:47:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993289884] [2023-08-04 08:47:17,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:17,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:17,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:17,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 234 [2023-08-04 08:47:17,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 78 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 08:47:17,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:17,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 234 [2023-08-04 08:47:17,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:17,819 INFO L124 PetriNetUnfolderBase]: 108/201 cut-off events. [2023-08-04 08:47:17,819 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 08:47:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 201 events. 108/201 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 555 event pairs, 21 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 304. Up to 183 conditions per place. [2023-08-04 08:47:17,821 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 23 selfloop transitions, 2 changer transitions 3/30 dead transitions. [2023-08-04 08:47:17,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 134 flow [2023-08-04 08:47:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-04 08:47:17,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-04 08:47:17,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-04 08:47:17,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-04 08:47:17,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:17,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-04 08:47:17,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:17,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:17,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:17,851 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 78 flow. Second operand 3 states and 325 transitions. [2023-08-04 08:47:17,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 134 flow [2023-08-04 08:47:17,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:17,855 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 76 flow [2023-08-04 08:47:17,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 08:47:17,859 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 08:47:17,860 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 76 flow [2023-08-04 08:47:17,860 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 08:47:17,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:17,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:47:17,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:17,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash 677091919, now seen corresponding path program 1 times [2023-08-04 08:47:17,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:17,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181200957] [2023-08-04 08:47:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:17,947 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 08:47:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181200957] [2023-08-04 08:47:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181200957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927658516] [2023-08-04 08:47:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:17,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:17,953 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 08:47:17,956 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 08:47:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:18,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:18,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:18,037 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 08:47:18,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927658516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:18,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:47:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642126280] [2023-08-04 08:47:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:18,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:18,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:18,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:18,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:18,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 234 [2023-08-04 08:47:18,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 76 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 08:47:18,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:18,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 234 [2023-08-04 08:47:18,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:18,123 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-08-04 08:47:18,123 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 08:47:18,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 195 events. 106/195 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 455 event pairs, 24 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 302. Up to 168 conditions per place. [2023-08-04 08:47:18,126 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 25 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 08:47:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 142 flow [2023-08-04 08:47:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-04 08:47:18,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46438746438746437 [2023-08-04 08:47:18,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-04 08:47:18,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-04 08:47:18,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:18,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-04 08:47:18,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,146 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 76 flow. Second operand 3 states and 326 transitions. [2023-08-04 08:47:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 142 flow [2023-08-04 08:47:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:47:18,147 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 74 flow [2023-08-04 08:47:18,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-04 08:47:18,148 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-08-04 08:47:18,148 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 74 flow [2023-08-04 08:47:18,149 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 08:47:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:18,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:47:18,349 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 08:47:18,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:18,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1124472180, now seen corresponding path program 1 times [2023-08-04 08:47:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:18,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168142200] [2023-08-04 08:47:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:18,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:18,443 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 08:47:18,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:18,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168142200] [2023-08-04 08:47:18,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168142200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:18,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27275819] [2023-08-04 08:47:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:18,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:18,446 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 08:47:18,449 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 08:47:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:18,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:18,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:18,505 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 08:47:18,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27275819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:18,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:18,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:47:18,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900778431] [2023-08-04 08:47:18,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:18,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 234 [2023-08-04 08:47:18,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 74 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 08:47:18,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:18,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 234 [2023-08-04 08:47:18,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:18,567 INFO L124 PetriNetUnfolderBase]: 74/143 cut-off events. [2023-08-04 08:47:18,567 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 08:47:18,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 143 events. 74/143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 139. Up to 106 conditions per place. [2023-08-04 08:47:18,568 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-04 08:47:18,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 156 flow [2023-08-04 08:47:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-04 08:47:18,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686609686609687 [2023-08-04 08:47:18,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-04 08:47:18,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-04 08:47:18,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:18,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-04 08:47:18,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:18,573 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 74 flow. Second operand 3 states and 329 transitions. [2023-08-04 08:47:18,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 156 flow [2023-08-04 08:47:18,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:18,575 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 82 flow [2023-08-04 08:47:18,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-04 08:47:18,575 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-04 08:47:18,576 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 82 flow [2023-08-04 08:47:18,576 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 08:47:18,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:18,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:18,584 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 08:47:18,781 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 08:47:18,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:18,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash -257736287, now seen corresponding path program 1 times [2023-08-04 08:47:18,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:18,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388442547] [2023-08-04 08:47:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:18,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:18,865 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 08:47:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388442547] [2023-08-04 08:47:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388442547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823701974] [2023-08-04 08:47:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:18,879 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 08:47:18,881 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 08:47:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:18,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:18,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:18,941 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 08:47:18,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823701974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:18,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:18,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:47:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137006773] [2023-08-04 08:47:18,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:18,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:18,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 234 [2023-08-04 08:47:18,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 82 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 08:47:18,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:18,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 234 [2023-08-04 08:47:18,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:18,997 INFO L124 PetriNetUnfolderBase]: 69/136 cut-off events. [2023-08-04 08:47:18,997 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-04 08:47:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 136 events. 69/136 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 250 event pairs, 29 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 142. Up to 111 conditions per place. [2023-08-04 08:47:18,998 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 25 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-04 08:47:18,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 150 flow [2023-08-04 08:47:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-04 08:47:19,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46438746438746437 [2023-08-04 08:47:19,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-04 08:47:19,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-04 08:47:19,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:19,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-04 08:47:19,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,010 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 82 flow. Second operand 3 states and 326 transitions. [2023-08-04 08:47:19,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 150 flow [2023-08-04 08:47:19,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:19,013 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 84 flow [2023-08-04 08:47:19,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 08:47:19,015 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 08:47:19,015 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 84 flow [2023-08-04 08:47:19,015 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 08:47:19,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:19,015 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 08:47:19,027 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 08:47:19,223 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 08:47:19,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:19,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1336635730, now seen corresponding path program 1 times [2023-08-04 08:47:19,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:19,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939439392] [2023-08-04 08:47:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:19,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:19,282 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 08:47:19,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:19,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939439392] [2023-08-04 08:47:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939439392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:19,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055649374] [2023-08-04 08:47:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:19,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:19,284 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 08:47:19,308 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 08:47:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:19,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:19,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:47:19,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:19,400 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 08:47:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055649374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:19,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:19,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:47:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881965494] [2023-08-04 08:47:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:19,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:19,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-04 08:47:19,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 84 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 08:47:19,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:19,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-04 08:47:19,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:19,437 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 08:47:19,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:19,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 08:47:19,437 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 08:47:19,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 9 transitions, 40 flow [2023-08-04 08:47:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-08-04 08:47:19,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2023-08-04 08:47:19,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-08-04 08:47:19,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-08-04 08:47:19,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:19,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-08-04 08:47:19,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,443 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 84 flow. Second operand 4 states and 402 transitions. [2023-08-04 08:47:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 9 transitions, 40 flow [2023-08-04 08:47:19,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:19,444 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 08:47:19,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 08:47:19,446 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -12 predicate places. [2023-08-04 08:47:19,446 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 08:47:19,447 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 08:47:19,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:47:19,457 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 08:47:19,657 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 08:47:19,657 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:47:19,659 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:47:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,688 INFO L124 PetriNetUnfolderBase]: 34/257 cut-off events. [2023-08-04 08:47:19,689 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:47:19,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 257 events. 34/257 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 740 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2023-08-04 08:47:19,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:19,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 264 flow [2023-08-04 08:47:19,714 INFO L124 PetriNetUnfolderBase]: 34/257 cut-off events. [2023-08-04 08:47:19,714 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:47:19,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 257 events. 34/257 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 740 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2023-08-04 08:47:19,716 INFO L119 LiptonReduction]: Number of co-enabled transitions 1392 [2023-08-04 08:47:21,900 INFO L134 LiptonReduction]: Checked pairs total: 2094 [2023-08-04 08:47:21,901 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 08:47:21,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:47:21,903 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;@59dfdd64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:21,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:47:21,906 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:21,906 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-08-04 08:47:21,906 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:21,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:21,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:47:21,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:21,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 712350698, now seen corresponding path program 1 times [2023-08-04 08:47:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702757955] [2023-08-04 08:47:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:21,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:21,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:47:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:21,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:47:21,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:47:21,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:47:21,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:47:21,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:47:21,943 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:47:21,944 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:47:21,944 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:47:21,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:47:21,960 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:47:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,022 INFO L124 PetriNetUnfolderBase]: 135/812 cut-off events. [2023-08-04 08:47:22,023 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:47:22,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 135/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3891 event pairs, 2 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 485. Up to 32 conditions per place. [2023-08-04 08:47:22,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:22,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:22,090 INFO L124 PetriNetUnfolderBase]: 135/812 cut-off events. [2023-08-04 08:47:22,090 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:47:22,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 135/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3891 event pairs, 2 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 485. Up to 32 conditions per place. [2023-08-04 08:47:22,100 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-08-04 08:47:24,780 INFO L134 LiptonReduction]: Checked pairs total: 11074 [2023-08-04 08:47:24,780 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 08:47:24,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:24,783 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;@59dfdd64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:24,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:24,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:24,785 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 08:47:24,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:24,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:24,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:47:24,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:24,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 836983049, now seen corresponding path program 1 times [2023-08-04 08:47:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:24,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895436575] [2023-08-04 08:47:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:24,822 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 08:47:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895436575] [2023-08-04 08:47:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895436575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:47:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864167289] [2023-08-04 08:47:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:24,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:24,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-08-04 08:47:24,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:24,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:24,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-08-04 08:47:24,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:25,035 INFO L124 PetriNetUnfolderBase]: 1950/2799 cut-off events. [2023-08-04 08:47:25,035 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-04 08:47:25,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 2799 events. 1950/2799 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10519 event pairs, 641 based on Foata normal form. 0/2583 useless extension candidates. Maximal degree in co-relation 2138. Up to 2621 conditions per place. [2023-08-04 08:47:25,050 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 35 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 08:47:25,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-04 08:47:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 08:47:25,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669260700389105 [2023-08-04 08:47:25,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 08:47:25,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 08:47:25,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:25,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 08:47:25,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,056 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 360 transitions. [2023-08-04 08:47:25,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-04 08:47:25,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:25,060 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 08:47:25,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-04 08:47:25,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:47:25,063 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 08:47:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:25,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:47:25,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:25,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 958106759, now seen corresponding path program 1 times [2023-08-04 08:47:25,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:25,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651737330] [2023-08-04 08:47:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:25,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:25,106 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 08:47:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:25,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651737330] [2023-08-04 08:47:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651737330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:25,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342294694] [2023-08-04 08:47:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:25,109 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 08:47:25,132 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 08:47:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:25,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:25,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:25,174 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 08:47:25,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342294694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:25,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:47:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047839766] [2023-08-04 08:47:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:25,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-08-04 08:47:25,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:25,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-08-04 08:47:25,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:25,393 INFO L124 PetriNetUnfolderBase]: 1944/2791 cut-off events. [2023-08-04 08:47:25,393 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2023-08-04 08:47:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5705 conditions, 2791 events. 1944/2791 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10443 event pairs, 644 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 5675. Up to 2550 conditions per place. [2023-08-04 08:47:25,409 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 08:47:25,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 234 flow [2023-08-04 08:47:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 08:47:25,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708171206225681 [2023-08-04 08:47:25,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 08:47:25,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 08:47:25,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:25,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 08:47:25,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,414 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 363 transitions. [2023-08-04 08:47:25,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 234 flow [2023-08-04 08:47:25,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:47:25,418 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 08:47:25,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-04 08:47:25,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 08:47:25,420 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 08:47:25,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:25,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:25,431 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 08:47:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:25,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:25,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1083524510, now seen corresponding path program 1 times [2023-08-04 08:47:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100886446] [2023-08-04 08:47:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:25,669 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 08:47:25,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100886446] [2023-08-04 08:47:25,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100886446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254395777] [2023-08-04 08:47:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:25,674 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 08:47:25,697 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 08:47:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:25,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:25,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:25,746 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 08:47:25,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:25,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254395777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:25,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:25,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:47:25,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829805820] [2023-08-04 08:47:25,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:25,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:25,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:25,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-08-04 08:47:25,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 138 flow. Second operand has 3 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 08:47:25,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:25,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-08-04 08:47:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:25,953 INFO L124 PetriNetUnfolderBase]: 1788/2611 cut-off events. [2023-08-04 08:47:25,954 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 08:47:25,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5424 conditions, 2611 events. 1788/2611 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9913 event pairs, 620 based on Foata normal form. 0/2475 useless extension candidates. Maximal degree in co-relation 2333. Up to 1936 conditions per place. [2023-08-04 08:47:25,971 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 08:47:25,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 274 flow [2023-08-04 08:47:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 08:47:25,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785992217898833 [2023-08-04 08:47:25,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 08:47:25,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 08:47:25,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:25,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 08:47:25,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:25,976 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 369 transitions. [2023-08-04 08:47:25,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 274 flow [2023-08-04 08:47:25,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:25,979 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 08:47:25,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 08:47:25,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:47:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 08:47:25,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 08:47:25,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:25,981 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 08:47:25,986 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 08:47:26,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:26,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:26,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1985688943, now seen corresponding path program 1 times [2023-08-04 08:47:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274532946] [2023-08-04 08:47:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:26,230 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 08:47:26,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274532946] [2023-08-04 08:47:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274532946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952514369] [2023-08-04 08:47:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:26,232 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 08:47:26,234 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 08:47:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:26,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:26,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:26,296 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 08:47:26,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952514369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:26,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:47:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078405138] [2023-08-04 08:47:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:26,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:26,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:26,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-08-04 08:47:26,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:26,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-08-04 08:47:26,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:26,521 INFO L124 PetriNetUnfolderBase]: 1807/2682 cut-off events. [2023-08-04 08:47:26,522 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 08:47:26,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5820 conditions, 2682 events. 1807/2682 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10240 event pairs, 675 based on Foata normal form. 0/2643 useless extension candidates. Maximal degree in co-relation 2650. Up to 1944 conditions per place. [2023-08-04 08:47:26,537 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 08:47:26,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 286 flow [2023-08-04 08:47:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 08:47:26,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785992217898833 [2023-08-04 08:47:26,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 08:47:26,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 08:47:26,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:26,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 08:47:26,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,542 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 369 transitions. [2023-08-04 08:47:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 286 flow [2023-08-04 08:47:26,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:26,546 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 08:47:26,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 08:47:26,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 08:47:26,547 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 08:47:26,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:26,547 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 08:47:26,553 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 08:47:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:26,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:26,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:26,753 INFO L85 PathProgramCache]: Analyzing trace with hash 814762603, now seen corresponding path program 1 times [2023-08-04 08:47:26,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:26,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454786160] [2023-08-04 08:47:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:26,803 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 08:47:26,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454786160] [2023-08-04 08:47:26,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454786160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:26,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269890892] [2023-08-04 08:47:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:26,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:26,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:26,805 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 08:47:26,808 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 08:47:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:26,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:26,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:26,880 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 08:47:26,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:26,898 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 08:47:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269890892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:26,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:26,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 08:47:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49989118] [2023-08-04 08:47:26,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:47:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:47:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:47:26,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-04 08:47:26,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:26,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:26,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-04 08:47:26,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:27,094 INFO L124 PetriNetUnfolderBase]: 1613/2388 cut-off events. [2023-08-04 08:47:27,095 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 08:47:27,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5294 conditions, 2388 events. 1613/2388 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8908 event pairs, 387 based on Foata normal form. 2/2386 useless extension candidates. Maximal degree in co-relation 3143. Up to 2205 conditions per place. [2023-08-04 08:47:27,110 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 08:47:27,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 264 flow [2023-08-04 08:47:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2023-08-04 08:47:27,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45428015564202334 [2023-08-04 08:47:27,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2023-08-04 08:47:27,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2023-08-04 08:47:27,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:27,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2023-08-04 08:47:27,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,115 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 467 transitions. [2023-08-04 08:47:27,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 264 flow [2023-08-04 08:47:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:27,121 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 08:47:27,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-04 08:47:27,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 08:47:27,122 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 08:47:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:27,122 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 08:47:27,131 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 08:47:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:47:27,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:27,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash 210022363, now seen corresponding path program 1 times [2023-08-04 08:47:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:27,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401755042] [2023-08-04 08:47:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:27,397 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 08:47:27,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401755042] [2023-08-04 08:47:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401755042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662423923] [2023-08-04 08:47:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:27,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:27,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:27,399 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 08:47:27,424 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 08:47:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:27,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:27,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:27,487 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 08:47:27,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:27,500 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 08:47:27,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662423923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:27,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:27,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:47:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8467494] [2023-08-04 08:47:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:27,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:27,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-04 08:47:27,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:27,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-04 08:47:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:27,725 INFO L124 PetriNetUnfolderBase]: 1521/2252 cut-off events. [2023-08-04 08:47:27,725 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 08:47:27,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 2252 events. 1521/2252 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8041 event pairs, 364 based on Foata normal form. 8/2256 useless extension candidates. Maximal degree in co-relation 2918. Up to 1848 conditions per place. [2023-08-04 08:47:27,738 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 49 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 08:47:27,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 08:47:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 08:47:27,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46206225680933855 [2023-08-04 08:47:27,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 08:47:27,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 08:47:27,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:27,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 08:47:27,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,745 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 475 transitions. [2023-08-04 08:47:27,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 08:47:27,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:47:27,750 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 08:47:27,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-04 08:47:27,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 08:47:27,751 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 08:47:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:27,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:27,752 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 08:47:27,761 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 08:47:27,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:27,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:27,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -936281831, now seen corresponding path program 1 times [2023-08-04 08:47:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:27,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20160519] [2023-08-04 08:47:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:28,011 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 08:47:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20160519] [2023-08-04 08:47:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20160519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998677496] [2023-08-04 08:47:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:28,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:28,013 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 08:47:28,044 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 08:47:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:28,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:28,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:28,112 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 08:47:28,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:28,124 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 08:47:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998677496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:28,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:47:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239946791] [2023-08-04 08:47:28,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:28,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-04 08:47:28,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:28,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-04 08:47:28,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:28,315 INFO L124 PetriNetUnfolderBase]: 1017/1532 cut-off events. [2023-08-04 08:47:28,315 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 08:47:28,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3413 conditions, 1532 events. 1017/1532 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4911 event pairs, 215 based on Foata normal form. 32/1560 useless extension candidates. Maximal degree in co-relation 2742. Up to 663 conditions per place. [2023-08-04 08:47:28,327 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 08:47:28,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 346 flow [2023-08-04 08:47:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 08:47:28,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678988326848249 [2023-08-04 08:47:28,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:28,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,334 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 481 transitions. [2023-08-04 08:47:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 346 flow [2023-08-04 08:47:28,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:47:28,339 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 08:47:28,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-04 08:47:28,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 08:47:28,339 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 08:47:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:28,341 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 08:47:28,351 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 08:47:28,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:47:28,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:28,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:28,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1301097675, now seen corresponding path program 1 times [2023-08-04 08:47:28,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:28,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255345996] [2023-08-04 08:47:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:28,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:28,601 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 08:47:28,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255345996] [2023-08-04 08:47:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255345996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207408748] [2023-08-04 08:47:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:28,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:28,604 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 08:47:28,629 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 08:47:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:28,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:28,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:28,692 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 08:47:28,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:28,705 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 08:47:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207408748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:28,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:28,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:47:28,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106234788] [2023-08-04 08:47:28,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:28,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:28,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:28,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:28,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:28,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-04 08:47:28,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:28,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-04 08:47:28,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:28,877 INFO L124 PetriNetUnfolderBase]: 1009/1517 cut-off events. [2023-08-04 08:47:28,877 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 08:47:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1517 events. 1009/1517 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4822 event pairs, 439 based on Foata normal form. 9/1522 useless extension candidates. Maximal degree in co-relation 2923. Up to 1160 conditions per place. [2023-08-04 08:47:28,884 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-04 08:47:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 358 flow [2023-08-04 08:47:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 08:47:28,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678988326848249 [2023-08-04 08:47:28,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:28,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 08:47:28,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,890 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 481 transitions. [2023-08-04 08:47:28,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 358 flow [2023-08-04 08:47:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:28,894 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 08:47:28,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-04 08:47:28,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 08:47:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 08:47:28,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:28,895 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 08:47:28,907 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 08:47:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:47:29,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:29,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2002612719, now seen corresponding path program 1 times [2023-08-04 08:47:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956033833] [2023-08-04 08:47:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:47:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956033833] [2023-08-04 08:47:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956033833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:29,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 08:47:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256857824] [2023-08-04 08:47:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 257 [2023-08-04 08:47:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 257 [2023-08-04 08:47:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:29,301 INFO L124 PetriNetUnfolderBase]: 898/1323 cut-off events. [2023-08-04 08:47:29,301 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2023-08-04 08:47:29,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 1323 events. 898/1323 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3964 event pairs, 445 based on Foata normal form. 1/1320 useless extension candidates. Maximal degree in co-relation 2999. Up to 1228 conditions per place. [2023-08-04 08:47:29,305 INFO L140 encePairwiseOnDemand]: 255/257 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2023-08-04 08:47:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 256 flow [2023-08-04 08:47:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 08:47:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669260700389105 [2023-08-04 08:47:29,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 08:47:29,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 08:47:29,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:29,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 08:47:29,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:29,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:29,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:29,310 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 190 flow. Second operand 3 states and 360 transitions. [2023-08-04 08:47:29,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 256 flow [2023-08-04 08:47:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 244 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-04 08:47:29,313 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-04 08:47:29,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-04 08:47:29,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 08:47:29,314 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-04 08:47:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:29,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:47:29,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 08:47:29,315 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:29,315 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:47:29,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,364 INFO L124 PetriNetUnfolderBase]: 135/812 cut-off events. [2023-08-04 08:47:29,364 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:47:29,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 135/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3891 event pairs, 2 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 485. Up to 32 conditions per place. [2023-08-04 08:47:29,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:29,369 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 139 transitions, 326 flow [2023-08-04 08:47:29,415 INFO L124 PetriNetUnfolderBase]: 135/812 cut-off events. [2023-08-04 08:47:29,415 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:47:29,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 135/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3891 event pairs, 2 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 485. Up to 32 conditions per place. [2023-08-04 08:47:29,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-08-04 08:47:31,893 INFO L134 LiptonReduction]: Checked pairs total: 10258 [2023-08-04 08:47:31,894 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 08:47:31,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:47:31,895 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;@59dfdd64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:31,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:47:31,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:31,899 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2023-08-04 08:47:31,899 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:47:31,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:31,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:47:31,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:31,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 588299785, now seen corresponding path program 1 times [2023-08-04 08:47:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:31,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11278926] [2023-08-04 08:47:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:31,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:31,932 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 08:47:31,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11278926] [2023-08-04 08:47:31,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11278926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397941410] [2023-08-04 08:47:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:31,941 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 08:47:31,945 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 08:47:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:32,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:47:32,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:32,041 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 08:47:32,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397941410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:32,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:47:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169874078] [2023-08-04 08:47:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:47:32,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-08-04 08:47:32,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:32,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-08-04 08:47:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:32,228 INFO L124 PetriNetUnfolderBase]: 1976/2859 cut-off events. [2023-08-04 08:47:32,228 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2023-08-04 08:47:32,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5840 conditions, 2859 events. 1976/2859 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11110 event pairs, 434 based on Foata normal form. 0/2638 useless extension candidates. Maximal degree in co-relation 2138. Up to 2644 conditions per place. [2023-08-04 08:47:32,235 INFO L140 encePairwiseOnDemand]: 249/254 looper letters, 23 selfloop transitions, 5 changer transitions 17/52 dead transitions. [2023-08-04 08:47:32,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 234 flow [2023-08-04 08:47:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:47:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:47:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-04 08:47:32,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452755905511811 [2023-08-04 08:47:32,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-04 08:47:32,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-04 08:47:32,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:32,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-04 08:47:32,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,242 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 5 states and 575 transitions. [2023-08-04 08:47:32,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 234 flow [2023-08-04 08:47:32,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:32,243 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 91 flow [2023-08-04 08:47:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 08:47:32,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 08:47:32,244 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 91 flow [2023-08-04 08:47:32,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:32,245 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:47:32,255 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 08:47:32,455 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 08:47:32,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:32,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1787668449, now seen corresponding path program 1 times [2023-08-04 08:47:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630898018] [2023-08-04 08:47:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:47:32,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:32,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630898018] [2023-08-04 08:47:32,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630898018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:32,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:47:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018876269] [2023-08-04 08:47:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:32,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:32,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 254 [2023-08-04 08:47:32,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:32,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 254 [2023-08-04 08:47:32,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:32,536 INFO L124 PetriNetUnfolderBase]: 381/571 cut-off events. [2023-08-04 08:47:32,536 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 08:47:32,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 571 events. 381/571 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1664 event pairs, 114 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 503. Up to 513 conditions per place. [2023-08-04 08:47:32,538 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 21 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 08:47:32,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 140 flow [2023-08-04 08:47:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-04 08:47:32,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45144356955380577 [2023-08-04 08:47:32,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-04 08:47:32,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-04 08:47:32,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:32,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-04 08:47:32,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,543 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 91 flow. Second operand 3 states and 344 transitions. [2023-08-04 08:47:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 140 flow [2023-08-04 08:47:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 137 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:32,544 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 87 flow [2023-08-04 08:47:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-04 08:47:32,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 08:47:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 87 flow [2023-08-04 08:47:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:32,545 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:47:32,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:32,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash 465053893, now seen corresponding path program 1 times [2023-08-04 08:47:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917740765] [2023-08-04 08:47:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:32,576 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 08:47:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917740765] [2023-08-04 08:47:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917740765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623713857] [2023-08-04 08:47:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:32,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:32,578 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 08:47:32,581 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 08:47:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:32,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:32,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:32,654 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 08:47:32,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:32,666 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 08:47:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623713857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:32,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:47:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143306537] [2023-08-04 08:47:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:32,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-08-04 08:47:32,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:32,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-08-04 08:47:32,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:32,721 INFO L124 PetriNetUnfolderBase]: 287/421 cut-off events. [2023-08-04 08:47:32,722 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 08:47:32,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 421 events. 287/421 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1036 event pairs, 48 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 514. Up to 361 conditions per place. [2023-08-04 08:47:32,723 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 23 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-04 08:47:32,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 150 flow [2023-08-04 08:47:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-04 08:47:32,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438976377952756 [2023-08-04 08:47:32,725 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-04 08:47:32,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-04 08:47:32,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:32,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-04 08:47:32,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,728 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 87 flow. Second operand 4 states and 451 transitions. [2023-08-04 08:47:32,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 150 flow [2023-08-04 08:47:32,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:32,729 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 84 flow [2023-08-04 08:47:32,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-04 08:47:32,730 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-04 08:47:32,730 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 84 flow [2023-08-04 08:47:32,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:32,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:32,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:32,738 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 08:47:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:47:32,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:32,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1435959306, now seen corresponding path program 1 times [2023-08-04 08:47:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495633028] [2023-08-04 08:47:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:32,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495633028] [2023-08-04 08:47:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495633028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:32,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538122661] [2023-08-04 08:47:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:32,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:32,980 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 08:47:32,982 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 08:47:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:33,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:47:33,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:33,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538122661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:47:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588856768] [2023-08-04 08:47:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:47:33,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-08-04 08:47:33,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:33,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:33,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-08-04 08:47:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:33,152 INFO L124 PetriNetUnfolderBase]: 223/333 cut-off events. [2023-08-04 08:47:33,152 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 08:47:33,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 333 events. 223/333 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 776 event pairs, 8 based on Foata normal form. 16/345 useless extension candidates. Maximal degree in co-relation 397. Up to 136 conditions per place. [2023-08-04 08:47:33,153 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-04 08:47:33,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 198 flow [2023-08-04 08:47:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:47:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:47:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-04 08:47:33,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44803149606299214 [2023-08-04 08:47:33,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-04 08:47:33,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-04 08:47:33,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:33,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-04 08:47:33,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:33,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:33,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:33,158 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 5 states and 569 transitions. [2023-08-04 08:47:33,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 198 flow [2023-08-04 08:47:33,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:47:33,159 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-04 08:47:33,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-04 08:47:33,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 08:47:33,160 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-04 08:47:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:33,160 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:47:33,160 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:47:33,168 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 08:47:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:33,366 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 08:47:33,367 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (2/2) [2023-08-04 08:47:33,367 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:47:33,367 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:47:33,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:47:33 BasicIcfg [2023-08-04 08:47:33,371 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:47:33,372 INFO L158 Benchmark]: Toolchain (without parser) took 19780.32ms. Allocated memory was 373.3MB in the beginning and 662.7MB in the end (delta: 289.4MB). Free memory was 323.2MB in the beginning and 319.8MB in the end (delta: 3.4MB). Peak memory consumption was 293.3MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,372 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 326.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:47:33,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.73ms. Allocated memory is still 373.3MB. Free memory was 322.8MB in the beginning and 311.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.04ms. Allocated memory is still 373.3MB. Free memory was 311.8MB in the beginning and 310.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,372 INFO L158 Benchmark]: Boogie Preprocessor took 23.11ms. Allocated memory is still 373.3MB. Free memory was 310.1MB in the beginning and 308.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,372 INFO L158 Benchmark]: RCFGBuilder took 423.84ms. Allocated memory is still 373.3MB. Free memory was 308.3MB in the beginning and 290.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,373 INFO L158 Benchmark]: TraceAbstraction took 19106.54ms. Allocated memory was 373.3MB in the beginning and 662.7MB in the end (delta: 289.4MB). Free memory was 290.2MB in the beginning and 319.8MB in the end (delta: -29.6MB). Peak memory consumption was 261.9MB. Max. memory is 16.0GB. [2023-08-04 08:47:33,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 326.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 191.73ms. Allocated memory is still 373.3MB. Free memory was 322.8MB in the beginning and 311.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.04ms. Allocated memory is still 373.3MB. Free memory was 311.8MB in the beginning and 310.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.11ms. Allocated memory is still 373.3MB. Free memory was 310.1MB in the beginning and 308.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 423.84ms. Allocated memory is still 373.3MB. Free memory was 308.3MB in the beginning and 290.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 19106.54ms. Allocated memory was 373.3MB in the beginning and 662.7MB in the end (delta: 289.4MB). Free memory was 290.2MB in the beginning and 319.8MB in the end (delta: -29.6MB). Peak memory consumption was 261.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 111 PlacesBefore, 27 PlacesAfterwards, 121 TransitionsBefore, 28 TransitionsAfterwards, 1392 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 13 ConcurrentYvCompositions, 9 ChoiceCompositions, 113 TotalNumberOfCompositions, 2094 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2088, independent: 2082, independent conditional: 0, independent unconditional: 2082, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 733, independent: 729, independent conditional: 0, independent unconditional: 729, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2088, independent: 1353, independent conditional: 0, independent unconditional: 1353, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 733, unknown conditional: 0, unknown unconditional: 733] , Statistics on independence cache: Total cache size (in pairs): 49, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, 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: 2.2s, 111 PlacesBefore, 27 PlacesAfterwards, 121 TransitionsBefore, 28 TransitionsAfterwards, 1392 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 13 ConcurrentYvCompositions, 9 ChoiceCompositions, 108 TotalNumberOfCompositions, 2094 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2088, independent: 2082, independent conditional: 0, independent unconditional: 2082, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 738, independent: 734, independent conditional: 0, independent unconditional: 734, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2088, independent: 1348, independent conditional: 0, independent unconditional: 1348, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 738, unknown conditional: 0, unknown unconditional: 738] , Statistics on independence cache: Total cache size (in pairs): 49, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, 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: 2.8s, 125 PlacesBefore, 41 PlacesAfterwards, 139 TransitionsBefore, 44 TransitionsAfterwards, 3312 CoEnabledTransitionPairs, 8 FixpointIterations, 46 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 17 ConcurrentYvCompositions, 11 ChoiceCompositions, 118 TotalNumberOfCompositions, 11074 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7829, independent: 7687, independent conditional: 0, independent unconditional: 7687, dependent: 142, dependent conditional: 0, dependent unconditional: 142, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1865, independent: 1838, independent conditional: 0, independent unconditional: 1838, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7829, independent: 5849, independent conditional: 0, independent unconditional: 5849, dependent: 115, dependent conditional: 0, dependent unconditional: 115, unknown: 1865, unknown conditional: 0, unknown unconditional: 1865] , Statistics on independence cache: Total cache size (in pairs): 283, Positive cache size: 275, Positive conditional cache size: 0, Positive unconditional cache size: 275, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 125 PlacesBefore, 41 PlacesAfterwards, 139 TransitionsBefore, 44 TransitionsAfterwards, 3312 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 17 ConcurrentYvCompositions, 11 ChoiceCompositions, 115 TotalNumberOfCompositions, 10258 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7491, independent: 7365, independent conditional: 0, independent unconditional: 7365, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1887, independent: 1860, independent conditional: 0, independent unconditional: 1860, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7491, independent: 5505, independent conditional: 0, independent unconditional: 5505, dependent: 99, dependent conditional: 0, dependent unconditional: 99, unknown: 1887, unknown conditional: 0, unknown unconditional: 1887] , Statistics on independence cache: Total cache size (in pairs): 293, Positive cache size: 285, Positive conditional cache size: 0, Positive unconditional cache size: 285, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 84]: 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, 117 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: 5.3s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 104 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 250 IncrementalHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 10 mSDtfsCounter, 250 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=84occurred 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 394 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, 127 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: 7.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 836 IncrementalHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 17 mSDtfsCounter, 836 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 259 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=8, InterpolantAutomatonStates: 31, 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, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 457 ConstructedInterpolants, 0 QuantifiedInterpolants, 703 SizeOfPredicates, 0 NumberOfNonLiveVariables, 844 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 154/169 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, 117 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: 2.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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, 127 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: 4.0s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 158 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 128 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 272 IncrementalHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 1 mSDtfsCounter, 272 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=0, InterpolantAutomatonStates: 17, 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, 0.2s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 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 08:47:33,397 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...