/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/pthread_triangular-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:58:13,685 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:58:13,762 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:58:13,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:58:13,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:58:13,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:58:13,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:58:13,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:58:13,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:58:13,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:58:13,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:58:13,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:58:13,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:58:13,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:58:13,800 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:58:13,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:58:13,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:58:13,800 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:58:13,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:58:13,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:58:13,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:58:13,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:58:13,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:58:13,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:58:13,803 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:58:13,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:58:13,803 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:58:13,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:58:13,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:58:13,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:58:13,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:58:13,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:58:13,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:58:13,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:58:13,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:58:13,806 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:58:13,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:58:13,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:58:14,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:58:14,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:58:14,008 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:58:14,009 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:58:14,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i [2023-08-04 07:58:15,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:58:15,254 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:58:15,254 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i [2023-08-04 07:58:15,266 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7563cd33b/edc0b84c6a864db7871e55650e7d365a/FLAG2c0f4bab6 [2023-08-04 07:58:15,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7563cd33b/edc0b84c6a864db7871e55650e7d365a [2023-08-04 07:58:15,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:58:15,280 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:58:15,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:58:15,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:58:15,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:58:15,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7d7cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15, skipping insertion in model container [2023-08-04 07:58:15,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,315 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:58:15,543 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i[31036,31049] [2023-08-04 07:58:15,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:58:15,552 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:58:15,583 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-04 07:58:15,584 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-04 07:58:15,613 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i[31036,31049] [2023-08-04 07:58:15,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:58:15,639 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:58:15,639 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:58:15,645 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:58:15,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15 WrapperNode [2023-08-04 07:58:15,646 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:58:15,647 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:58:15,647 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:58:15,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:58:15,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,685 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2023-08-04 07:58:15,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:58:15,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:58:15,686 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:58:15,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:58:15,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,695 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,707 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:58:15,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:58:15,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:58:15,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:58:15,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (1/1) ... [2023-08-04 07:58:15,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:58:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:15,759 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 07:58:15,777 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 07:58:15,786 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:58:15,787 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:58:15,787 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:58:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:58:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:58:15,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:58:15,789 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 07:58:15,887 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:58:15,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:58:16,018 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:58:16,026 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:58:16,026 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:58:16,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:58:16 BoogieIcfgContainer [2023-08-04 07:58:16,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:58:16,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:58:16,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:58:16,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:58:16,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:58:15" (1/3) ... [2023-08-04 07:58:16,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2291fb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:58:16, skipping insertion in model container [2023-08-04 07:58:16,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:58:15" (2/3) ... [2023-08-04 07:58:16,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2291fb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:58:16, skipping insertion in model container [2023-08-04 07:58:16,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:58:16" (3/3) ... [2023-08-04 07:58:16,036 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_triangular-2_bound2.i [2023-08-04 07:58:16,042 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:58:16,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:58:16,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:58:16,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:58:16,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:58:16,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,178 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-04 07:58:16,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:16,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-04 07:58:16,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:58:16,199 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:16,259 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-04 07:58:16,259 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:16,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-04 07:58:16,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 1694 [2023-08-04 07:58:17,762 INFO L134 LiptonReduction]: Checked pairs total: 1481 [2023-08-04 07:58:17,763 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-04 07:58:17,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:58:17,783 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;@6f62479f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:58:17,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:58:17,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:58:17,790 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-04 07:58:17,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:17,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:17,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:58:17,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:17,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash 9912496, now seen corresponding path program 1 times [2023-08-04 07:58:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415455517] [2023-08-04 07:58:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:17,992 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 07:58:17,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:17,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415455517] [2023-08-04 07:58:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415455517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:17,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:17,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:58:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339171626] [2023-08-04 07:58:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:58:18,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 150 [2023-08-04 07:58:18,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:18,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 150 [2023-08-04 07:58:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:18,122 INFO L124 PetriNetUnfolderBase]: 124/210 cut-off events. [2023-08-04 07:58:18,122 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:18,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 210 events. 124/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 587 event pairs, 30 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 414. Up to 199 conditions per place. [2023-08-04 07:58:18,126 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 17 selfloop transitions, 2 changer transitions 4/23 dead transitions. [2023-08-04 07:58:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 98 flow [2023-08-04 07:58:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-04 07:58:18,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-08-04 07:58:18,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-04 07:58:18,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-04 07:58:18,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:18,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-04 07:58:18,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,155 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 227 transitions. [2023-08-04 07:58:18,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 98 flow [2023-08-04 07:58:18,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:58:18,159 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 46 flow [2023-08-04 07:58:18,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-04 07:58:18,163 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-04 07:58:18,163 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 46 flow [2023-08-04 07:58:18,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:18,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:18,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:58:18,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:18,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash -340795523, now seen corresponding path program 1 times [2023-08-04 07:58:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:18,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732019383] [2023-08-04 07:58:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:18,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:18,243 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 07:58:18,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732019383] [2023-08-04 07:58:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732019383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865690703] [2023-08-04 07:58:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:18,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:18,261 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 07:58:18,263 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 07:58:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:18,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:58:18,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:18,351 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 07:58:18,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:58:18,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865690703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:18,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:58:18,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:58:18,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871540088] [2023-08-04 07:58:18,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:18,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 150 [2023-08-04 07:58:18,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:18,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 150 [2023-08-04 07:58:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:18,409 INFO L124 PetriNetUnfolderBase]: 97/159 cut-off events. [2023-08-04 07:58:18,409 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:58:18,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 159 events. 97/159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 385 event pairs, 28 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 327. Up to 127 conditions per place. [2023-08-04 07:58:18,412 INFO L140 encePairwiseOnDemand]: 147/150 looper letters, 20 selfloop transitions, 2 changer transitions 1/23 dead transitions. [2023-08-04 07:58:18,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-08-04 07:58:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-04 07:58:18,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2023-08-04 07:58:18,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-04 07:58:18,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-04 07:58:18,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:18,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-04 07:58:18,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,425 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 46 flow. Second operand 3 states and 228 transitions. [2023-08-04 07:58:18,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-08-04 07:58:18,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 23 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:58:18,427 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 50 flow [2023-08-04 07:58:18,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-04 07:58:18,431 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-04 07:58:18,431 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 50 flow [2023-08-04 07:58:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:18,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:18,447 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 07:58:18,636 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 07:58:18,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:18,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 668367625, now seen corresponding path program 1 times [2023-08-04 07:58:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112645503] [2023-08-04 07:58:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:18,702 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 07:58:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112645503] [2023-08-04 07:58:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112645503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371230506] [2023-08-04 07:58:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:18,710 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 07:58:18,712 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 07:58:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:18,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:58:18,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:18,793 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 07:58:18,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:18,807 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 07:58:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371230506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:18,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 07:58:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16974417] [2023-08-04 07:58:18,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:58:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:58:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:58:18,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 150 [2023-08-04 07:58:18,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:18,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 150 [2023-08-04 07:58:18,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:18,845 INFO L124 PetriNetUnfolderBase]: 7/18 cut-off events. [2023-08-04 07:58:18,845 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:58:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 18 events. 7/18 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2023-08-04 07:58:18,845 INFO L140 encePairwiseOnDemand]: 147/150 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:58:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 11 transitions, 49 flow [2023-08-04 07:58:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 280 transitions. [2023-08-04 07:58:18,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-04 07:58:18,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 280 transitions. [2023-08-04 07:58:18,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 280 transitions. [2023-08-04 07:58:18,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:18,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 280 transitions. [2023-08-04 07:58:18,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,851 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 50 flow. Second operand 4 states and 280 transitions. [2023-08-04 07:58:18,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 11 transitions, 49 flow [2023-08-04 07:58:18,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:18,852 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:58:18,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 07:58:18,852 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -7 predicate places. [2023-08-04 07:58:18,853 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:58:18,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:18,855 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:58:18,862 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 07:58:19,060 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 07:58:19,060 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 07:58:19,063 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:58:19,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,080 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-04 07:58:19,080 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-04 07:58:19,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,081 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:58:19,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-04 07:58:19,089 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-04 07:58:19,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:19,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-04 07:58:19,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 1694 [2023-08-04 07:58:20,464 INFO L134 LiptonReduction]: Checked pairs total: 1505 [2023-08-04 07:58:20,465 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-04 07:58:20,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:58:20,467 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;@6f62479f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:58:20,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:58:20,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:58:20,470 INFO L124 PetriNetUnfolderBase]: 5/28 cut-off events. [2023-08-04 07:58:20,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:20,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:20,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:58:20,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:58:20,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1238742026, now seen corresponding path program 1 times [2023-08-04 07:58:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:20,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57470696] [2023-08-04 07:58:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:58:20,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:58:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:58:20,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:58:20,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:58:20,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:58:20,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:58:20,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:58:20,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:58:20,529 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:58:20,529 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:58:20,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:58:20,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:58:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,562 INFO L124 PetriNetUnfolderBase]: 37/358 cut-off events. [2023-08-04 07:58:20,562 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:58:20,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 358 events. 37/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1423 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 257. Up to 18 conditions per place. [2023-08-04 07:58:20,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:58:20,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 232 flow [2023-08-04 07:58:20,583 INFO L124 PetriNetUnfolderBase]: 37/358 cut-off events. [2023-08-04 07:58:20,583 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:58:20,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 358 events. 37/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1423 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 257. Up to 18 conditions per place. [2023-08-04 07:58:20,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 4444 [2023-08-04 07:58:22,056 INFO L134 LiptonReduction]: Checked pairs total: 3916 [2023-08-04 07:58:22,056 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 07:58:22,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:58:22,059 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;@6f62479f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:58:22,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:58:22,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:58:22,060 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-04 07:58:22,060 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:58:22,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:22,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:58:22,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:22,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash 18650122, now seen corresponding path program 1 times [2023-08-04 07:58:22,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:22,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758725492] [2023-08-04 07:58:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:22,082 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 07:58:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758725492] [2023-08-04 07:58:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758725492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:22,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:22,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:58:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579242350] [2023-08-04 07:58:22,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:22,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:58:22,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 190 [2023-08-04 07:58:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:22,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 190 [2023-08-04 07:58:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:22,349 INFO L124 PetriNetUnfolderBase]: 3088/4138 cut-off events. [2023-08-04 07:58:22,350 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 07:58:22,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8415 conditions, 4138 events. 3088/4138 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15410 event pairs, 1386 based on Foata normal form. 0/2737 useless extension candidates. Maximal degree in co-relation 2694. Up to 4045 conditions per place. [2023-08-04 07:58:22,372 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 27 selfloop transitions, 2 changer transitions 3/34 dead transitions. [2023-08-04 07:58:22,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 152 flow [2023-08-04 07:58:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 07:58:22,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519298245614035 [2023-08-04 07:58:22,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 07:58:22,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 07:58:22,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:22,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 07:58:22,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,376 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 84 flow. Second operand 3 states and 296 transitions. [2023-08-04 07:58:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 152 flow [2023-08-04 07:58:22,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 148 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:58:22,377 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 80 flow [2023-08-04 07:58:22,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-04 07:58:22,378 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 07:58:22,378 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 80 flow [2023-08-04 07:58:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:22,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:58:22,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:22,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1203386416, now seen corresponding path program 1 times [2023-08-04 07:58:22,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:22,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905804532] [2023-08-04 07:58:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:22,430 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 07:58:22,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905804532] [2023-08-04 07:58:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905804532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399677024] [2023-08-04 07:58:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:22,447 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 07:58:22,448 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 07:58:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:22,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:58:22,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:22,507 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 07:58:22,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:58:22,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399677024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:22,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:58:22,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:58:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818730954] [2023-08-04 07:58:22,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:22,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:22,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 190 [2023-08-04 07:58:22,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:22,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 190 [2023-08-04 07:58:22,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:22,684 INFO L124 PetriNetUnfolderBase]: 2521/3355 cut-off events. [2023-08-04 07:58:22,685 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 07:58:22,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 3355 events. 2521/3355 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11665 event pairs, 1120 based on Foata normal form. 0/2323 useless extension candidates. Maximal degree in co-relation 6801. Up to 3127 conditions per place. [2023-08-04 07:58:22,699 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-04 07:58:22,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 174 flow [2023-08-04 07:58:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-04 07:58:22,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-04 07:58:22,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-04 07:58:22,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-04 07:58:22,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:22,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-04 07:58:22,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,704 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 80 flow. Second operand 3 states and 300 transitions. [2023-08-04 07:58:22,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 174 flow [2023-08-04 07:58:22,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:22,706 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 90 flow [2023-08-04 07:58:22,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-04 07:58:22,707 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 07:58:22,707 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 90 flow [2023-08-04 07:58:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:22,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:22,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:22,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:58:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:22,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:22,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 127965763, now seen corresponding path program 1 times [2023-08-04 07:58:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989116456] [2023-08-04 07:58:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:22,972 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 07:58:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989116456] [2023-08-04 07:58:22,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989116456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465259921] [2023-08-04 07:58:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:22,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:23,001 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 07:58:23,003 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 07:58:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:23,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:58:23,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:23,107 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 07:58:23,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:23,125 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 07:58:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465259921] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:23,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:58:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538321811] [2023-08-04 07:58:23,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:23,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-04 07:58:23,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:23,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-04 07:58:23,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:23,320 INFO L124 PetriNetUnfolderBase]: 2044/2680 cut-off events. [2023-08-04 07:58:23,320 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 07:58:23,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5713 conditions, 2680 events. 2044/2680 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8666 event pairs, 564 based on Foata normal form. 3/1965 useless extension candidates. Maximal degree in co-relation 2272. Up to 2575 conditions per place. [2023-08-04 07:58:23,330 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 33 selfloop transitions, 3 changer transitions 1/39 dead transitions. [2023-08-04 07:58:23,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 186 flow [2023-08-04 07:58:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 385 transitions. [2023-08-04 07:58:23,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-08-04 07:58:23,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 385 transitions. [2023-08-04 07:58:23,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 385 transitions. [2023-08-04 07:58:23,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:23,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 385 transitions. [2023-08-04 07:58:23,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,336 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,336 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 90 flow. Second operand 4 states and 385 transitions. [2023-08-04 07:58:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 186 flow [2023-08-04 07:58:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:23,340 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 102 flow [2023-08-04 07:58:23,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 07:58:23,341 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-04 07:58:23,341 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 102 flow [2023-08-04 07:58:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:23,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:23,347 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 07:58:23,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:23,547 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:23,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 785131912, now seen corresponding path program 1 times [2023-08-04 07:58:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751822602] [2023-08-04 07:58:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:23,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:23,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751822602] [2023-08-04 07:58:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751822602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196036048] [2023-08-04 07:58:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:23,609 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 07:58:23,673 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 07:58:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:23,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:58:23,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:23,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196036048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:23,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:23,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:58:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465855109] [2023-08-04 07:58:23,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:23,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-04 07:58:23,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:23,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-04 07:58:23,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:23,941 INFO L124 PetriNetUnfolderBase]: 1864/2437 cut-off events. [2023-08-04 07:58:23,941 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 07:58:23,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 2437 events. 1864/2437 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7598 event pairs, 400 based on Foata normal form. 27/1806 useless extension candidates. Maximal degree in co-relation 2059. Up to 1282 conditions per place. [2023-08-04 07:58:23,952 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 45 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-04 07:58:23,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 246 flow [2023-08-04 07:58:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2023-08-04 07:58:23,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223684210526316 [2023-08-04 07:58:23,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2023-08-04 07:58:23,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2023-08-04 07:58:23,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:23,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2023-08-04 07:58:23,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,957 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 102 flow. Second operand 4 states and 397 transitions. [2023-08-04 07:58:23,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 246 flow [2023-08-04 07:58:23,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 239 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:58:23,959 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 109 flow [2023-08-04 07:58:23,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 07:58:23,960 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-04 07:58:23,960 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 109 flow [2023-08-04 07:58:23,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:23,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:23,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:58:24,165 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 07:58:24,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:24,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1194866460, now seen corresponding path program 1 times [2023-08-04 07:58:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:24,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837545237] [2023-08-04 07:58:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:58:24,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837545237] [2023-08-04 07:58:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837545237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:24,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:58:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903376970] [2023-08-04 07:58:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:58:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:58:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:58:24,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 190 [2023-08-04 07:58:24,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:24,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 190 [2023-08-04 07:58:24,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:24,571 INFO L124 PetriNetUnfolderBase]: 2458/3211 cut-off events. [2023-08-04 07:58:24,571 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2023-08-04 07:58:24,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7531 conditions, 3211 events. 2458/3211 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11096 event pairs, 622 based on Foata normal form. 81/2379 useless extension candidates. Maximal degree in co-relation 2953. Up to 1774 conditions per place. [2023-08-04 07:58:24,590 INFO L140 encePairwiseOnDemand]: 185/190 looper letters, 49 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-04 07:58:24,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 299 flow [2023-08-04 07:58:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2023-08-04 07:58:24,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118421052631579 [2023-08-04 07:58:24,592 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 389 transitions. [2023-08-04 07:58:24,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 389 transitions. [2023-08-04 07:58:24,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:24,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 389 transitions. [2023-08-04 07:58:24,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,595 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 109 flow. Second operand 4 states and 389 transitions. [2023-08-04 07:58:24,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 299 flow [2023-08-04 07:58:24,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 287 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:58:24,599 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 143 flow [2023-08-04 07:58:24,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-04 07:58:24,601 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-08-04 07:58:24,601 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 143 flow [2023-08-04 07:58:24,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:24,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 07:58:24,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:24,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1601358351, now seen corresponding path program 1 times [2023-08-04 07:58:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:24,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956843348] [2023-08-04 07:58:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956843348] [2023-08-04 07:58:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956843348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16132672] [2023-08-04 07:58:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:24,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:24,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:24,751 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 07:58:24,765 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 07:58:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:24,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 07:58:24,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:24,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:58:24,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16132672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:24,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:58:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-04 07:58:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253973750] [2023-08-04 07:58:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:58:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:24,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:24,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:24,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:24,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:25,369 INFO L124 PetriNetUnfolderBase]: 5048/6567 cut-off events. [2023-08-04 07:58:25,369 INFO L125 PetriNetUnfolderBase]: For 3963/3963 co-relation queries the response was YES. [2023-08-04 07:58:25,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 6567 events. 5048/6567 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26389 event pairs, 957 based on Foata normal form. 136/5655 useless extension candidates. Maximal degree in co-relation 11682. Up to 3332 conditions per place. [2023-08-04 07:58:25,393 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 84 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2023-08-04 07:58:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 100 transitions, 562 flow [2023-08-04 07:58:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 07:58:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 07:58:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 586 transitions. [2023-08-04 07:58:25,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140350877192983 [2023-08-04 07:58:25,395 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 586 transitions. [2023-08-04 07:58:25,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 586 transitions. [2023-08-04 07:58:25,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:25,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 586 transitions. [2023-08-04 07:58:25,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:25,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:25,398 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:25,398 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 143 flow. Second operand 6 states and 586 transitions. [2023-08-04 07:58:25,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 100 transitions, 562 flow [2023-08-04 07:58:25,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 100 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:58:25,403 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 270 flow [2023-08-04 07:58:25,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-08-04 07:58:25,404 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-04 07:58:25,404 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 270 flow [2023-08-04 07:58:25,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:25,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:25,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:25,417 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 07:58:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:25,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:25,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1601331381, now seen corresponding path program 2 times [2023-08-04 07:58:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969049447] [2023-08-04 07:58:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:58:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:25,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969049447] [2023-08-04 07:58:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969049447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:25,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:25,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:58:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365897309] [2023-08-04 07:58:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:25,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:25,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:25,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:25,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:25,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:25,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:26,061 INFO L124 PetriNetUnfolderBase]: 5360/7025 cut-off events. [2023-08-04 07:58:26,061 INFO L125 PetriNetUnfolderBase]: For 7626/7626 co-relation queries the response was YES. [2023-08-04 07:58:26,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20723 conditions, 7025 events. 5360/7025 cut-off events. For 7626/7626 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28559 event pairs, 1219 based on Foata normal form. 136/7151 useless extension candidates. Maximal degree in co-relation 16259. Up to 3588 conditions per place. [2023-08-04 07:58:26,089 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 86 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2023-08-04 07:58:26,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 111 transitions, 728 flow [2023-08-04 07:58:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 07:58:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 07:58:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 581 transitions. [2023-08-04 07:58:26,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096491228070176 [2023-08-04 07:58:26,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 581 transitions. [2023-08-04 07:58:26,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 581 transitions. [2023-08-04 07:58:26,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:26,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 581 transitions. [2023-08-04 07:58:26,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.83333333333333) internal successors, (581), 6 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:26,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:26,094 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:26,094 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 270 flow. Second operand 6 states and 581 transitions. [2023-08-04 07:58:26,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 111 transitions, 728 flow [2023-08-04 07:58:26,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 111 transitions, 718 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-04 07:58:26,114 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 437 flow [2023-08-04 07:58:26,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=437, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-04 07:58:26,115 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2023-08-04 07:58:26,115 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 437 flow [2023-08-04 07:58:26,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:26,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 07:58:26,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:26,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash -965252895, now seen corresponding path program 1 times [2023-08-04 07:58:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816209548] [2023-08-04 07:58:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:26,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816209548] [2023-08-04 07:58:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816209548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533201208] [2023-08-04 07:58:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:26,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:26,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:26,194 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 07:58:26,217 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 07:58:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:26,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:58:26,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:26,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:26,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533201208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:26,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-04 07:58:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446763256] [2023-08-04 07:58:26,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 07:58:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 07:58:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-04 07:58:26,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:26,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 437 flow. Second operand has 10 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:26,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:26,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:27,248 INFO L124 PetriNetUnfolderBase]: 8288/10783 cut-off events. [2023-08-04 07:58:27,248 INFO L125 PetriNetUnfolderBase]: For 22836/22836 co-relation queries the response was YES. [2023-08-04 07:58:27,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35297 conditions, 10783 events. 8288/10783 cut-off events. For 22836/22836 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 46768 event pairs, 616 based on Foata normal form. 320/11093 useless extension candidates. Maximal degree in co-relation 30076. Up to 1675 conditions per place. [2023-08-04 07:58:27,311 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 171 selfloop transitions, 49 changer transitions 0/222 dead transitions. [2023-08-04 07:58:27,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 222 transitions, 1479 flow [2023-08-04 07:58:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 07:58:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 07:58:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1360 transitions. [2023-08-04 07:58:27,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112781954887218 [2023-08-04 07:58:27,314 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1360 transitions. [2023-08-04 07:58:27,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1360 transitions. [2023-08-04 07:58:27,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:27,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1360 transitions. [2023-08-04 07:58:27,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:27,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:27,320 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:27,320 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 437 flow. Second operand 14 states and 1360 transitions. [2023-08-04 07:58:27,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 222 transitions, 1479 flow [2023-08-04 07:58:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 222 transitions, 1458 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:27,366 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 772 flow [2023-08-04 07:58:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=772, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-04 07:58:27,367 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 48 predicate places. [2023-08-04 07:58:27,367 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 772 flow [2023-08-04 07:58:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:27,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 07:58:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:27,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:27,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 50391111, now seen corresponding path program 2 times [2023-08-04 07:58:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784728671] [2023-08-04 07:58:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784728671] [2023-08-04 07:58:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784728671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666933181] [2023-08-04 07:58:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:58:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:27,694 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 07:58:27,695 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 07:58:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:58:27,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:58:27,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 07:58:27,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:27,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666933181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:27,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-04 07:58:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425750690] [2023-08-04 07:58:27,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:58:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:58:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:58:27,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:27,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 772 flow. Second operand has 15 states, 15 states have (on average 85.53333333333333) internal successors, (1283), 15 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:27,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:27,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:27,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:29,658 INFO L124 PetriNetUnfolderBase]: 14416/18655 cut-off events. [2023-08-04 07:58:29,658 INFO L125 PetriNetUnfolderBase]: For 107650/107650 co-relation queries the response was YES. [2023-08-04 07:58:29,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79570 conditions, 18655 events. 14416/18655 cut-off events. For 107650/107650 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 86233 event pairs, 643 based on Foata normal form. 320/18965 useless extension candidates. Maximal degree in co-relation 73043. Up to 2983 conditions per place. [2023-08-04 07:58:29,769 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 247 selfloop transitions, 86 changer transitions 0/335 dead transitions. [2023-08-04 07:58:29,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 335 transitions, 2942 flow [2023-08-04 07:58:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 07:58:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 07:58:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1946 transitions. [2023-08-04 07:58:29,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121052631578947 [2023-08-04 07:58:29,773 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1946 transitions. [2023-08-04 07:58:29,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1946 transitions. [2023-08-04 07:58:29,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:29,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1946 transitions. [2023-08-04 07:58:29,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 97.3) internal successors, (1946), 20 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:29,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:29,781 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:29,781 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 772 flow. Second operand 20 states and 1946 transitions. [2023-08-04 07:58:29,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 335 transitions, 2942 flow [2023-08-04 07:58:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 335 transitions, 2708 flow, removed 88 selfloop flow, removed 8 redundant places. [2023-08-04 07:58:30,426 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1378 flow [2023-08-04 07:58:30,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1378, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2023-08-04 07:58:30,427 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 69 predicate places. [2023-08-04 07:58:30,427 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1378 flow [2023-08-04 07:58:30,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.53333333333333) internal successors, (1283), 15 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:30,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:30,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:30,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 07:58:30,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 07:58:30,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:30,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1346769123, now seen corresponding path program 3 times [2023-08-04 07:58:30,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:30,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726687992] [2023-08-04 07:58:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:30,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:30,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726687992] [2023-08-04 07:58:30,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726687992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:30,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960175723] [2023-08-04 07:58:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:58:30,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:30,762 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 07:58:30,764 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 07:58:30,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 07:58:30,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:58:30,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 07:58:30,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:30,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960175723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:30,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:30,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-04 07:58:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719732284] [2023-08-04 07:58:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 07:58:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 07:58:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-04 07:58:31,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:31,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1378 flow. Second operand has 19 states, 19 states have (on average 85.21052631578948) internal successors, (1619), 19 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:31,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:31,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:31,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:33,879 INFO L124 PetriNetUnfolderBase]: 18192/23553 cut-off events. [2023-08-04 07:58:33,879 INFO L125 PetriNetUnfolderBase]: For 283383/283383 co-relation queries the response was YES. [2023-08-04 07:58:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123229 conditions, 23553 events. 18192/23553 cut-off events. For 283383/283383 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 110053 event pairs, 1186 based on Foata normal form. 256/23791 useless extension candidates. Maximal degree in co-relation 114199. Up to 3439 conditions per place. [2023-08-04 07:58:34,110 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 240 selfloop transitions, 101 changer transitions 0/343 dead transitions. [2023-08-04 07:58:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 343 transitions, 3848 flow [2023-08-04 07:58:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 07:58:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 07:58:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1841 transitions. [2023-08-04 07:58:34,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509972299168975 [2023-08-04 07:58:34,114 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1841 transitions. [2023-08-04 07:58:34,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1841 transitions. [2023-08-04 07:58:34,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:34,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1841 transitions. [2023-08-04 07:58:34,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 96.89473684210526) internal successors, (1841), 19 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:34,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 190.0) internal successors, (3800), 20 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:34,121 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 190.0) internal successors, (3800), 20 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:34,121 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1378 flow. Second operand 19 states and 1841 transitions. [2023-08-04 07:58:34,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 343 transitions, 3848 flow [2023-08-04 07:58:36,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 343 transitions, 3366 flow, removed 223 selfloop flow, removed 5 redundant places. [2023-08-04 07:58:36,442 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1800 flow [2023-08-04 07:58:36,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1800, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-08-04 07:58:36,442 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 90 predicate places. [2023-08-04 07:58:36,442 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1800 flow [2023-08-04 07:58:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.21052631578948) internal successors, (1619), 19 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:36,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 07:58:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:58:36,648 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:36,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1815853226, now seen corresponding path program 4 times [2023-08-04 07:58:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759581766] [2023-08-04 07:58:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:58:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759581766] [2023-08-04 07:58:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759581766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176924488] [2023-08-04 07:58:36,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 07:58:36,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:36,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:36,873 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 07:58:36,900 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 07:58:36,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 07:58:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:58:36,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 07:58:36,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:58:37,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:58:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176924488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:37,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-08-04 07:58:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731337714] [2023-08-04 07:58:37,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:58:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:58:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:58:37,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:37,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1800 flow. Second operand has 15 states, 15 states have (on average 84.8) internal successors, (1272), 15 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:37,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:37,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:39,798 INFO L124 PetriNetUnfolderBase]: 19040/24641 cut-off events. [2023-08-04 07:58:39,799 INFO L125 PetriNetUnfolderBase]: For 389732/389732 co-relation queries the response was YES. [2023-08-04 07:58:39,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138830 conditions, 24641 events. 19040/24641 cut-off events. For 389732/389732 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 115692 event pairs, 1162 based on Foata normal form. 64/24687 useless extension candidates. Maximal degree in co-relation 135843. Up to 3485 conditions per place. [2023-08-04 07:58:40,008 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 249 selfloop transitions, 111 changer transitions 0/362 dead transitions. [2023-08-04 07:58:40,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 362 transitions, 4207 flow [2023-08-04 07:58:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 07:58:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 07:58:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1937 transitions. [2023-08-04 07:58:40,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097368421052632 [2023-08-04 07:58:40,014 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1937 transitions. [2023-08-04 07:58:40,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1937 transitions. [2023-08-04 07:58:40,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:40,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1937 transitions. [2023-08-04 07:58:40,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.85) internal successors, (1937), 20 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:40,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:40,023 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:40,023 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1800 flow. Second operand 20 states and 1937 transitions. [2023-08-04 07:58:40,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 362 transitions, 4207 flow [2023-08-04 07:58:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 362 transitions, 3793 flow, removed 154 selfloop flow, removed 9 redundant places. [2023-08-04 07:58:44,420 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1782 flow [2023-08-04 07:58:44,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1782, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2023-08-04 07:58:44,421 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 102 predicate places. [2023-08-04 07:58:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1782 flow [2023-08-04 07:58:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.8) internal successors, (1272), 15 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:44,422 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:44,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 07:58:44,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 07:58:44,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:44,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2007140040, now seen corresponding path program 5 times [2023-08-04 07:58:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148571171] [2023-08-04 07:58:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148571171] [2023-08-04 07:58:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148571171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280699437] [2023-08-04 07:58:44,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-04 07:58:44,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:44,818 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 07:58:44,820 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 07:58:44,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-04 07:58:44,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:58:44,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 07:58:44,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:44,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:58:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280699437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:45,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:45,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-04 07:58:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779644372] [2023-08-04 07:58:45,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:45,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 07:58:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 07:58:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-08-04 07:58:45,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-04 07:58:45,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1782 flow. Second operand has 24 states, 24 states have (on average 84.95833333333333) internal successors, (2039), 24 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:45,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:45,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-04 07:58:45,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:48,191 INFO L124 PetriNetUnfolderBase]: 22160/28639 cut-off events. [2023-08-04 07:58:48,192 INFO L125 PetriNetUnfolderBase]: For 555518/555518 co-relation queries the response was YES. [2023-08-04 07:58:48,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167800 conditions, 28639 events. 22160/28639 cut-off events. For 555518/555518 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 135773 event pairs, 781 based on Foata normal form. 320/28949 useless extension candidates. Maximal degree in co-relation 164811. Up to 4055 conditions per place. [2023-08-04 07:58:48,455 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 344 selfloop transitions, 131 changer transitions 0/477 dead transitions. [2023-08-04 07:58:48,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 477 transitions, 5539 flow [2023-08-04 07:58:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-04 07:58:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-04 07:58:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2718 transitions. [2023-08-04 07:58:48,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109022556390977 [2023-08-04 07:58:48,458 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2718 transitions. [2023-08-04 07:58:48,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2718 transitions. [2023-08-04 07:58:48,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:48,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2718 transitions. [2023-08-04 07:58:48,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.07142857142857) internal successors, (2718), 28 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:48,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 190.0) internal successors, (5510), 29 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:48,467 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 190.0) internal successors, (5510), 29 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:48,467 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1782 flow. Second operand 28 states and 2718 transitions. [2023-08-04 07:58:48,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 477 transitions, 5539 flow [2023-08-04 07:58:52,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 477 transitions, 5207 flow, removed 60 selfloop flow, removed 18 redundant places. [2023-08-04 07:58:52,832 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 2404 flow [2023-08-04 07:58:52,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2404, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-08-04 07:58:52,832 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2023-08-04 07:58:52,833 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 2404 flow [2023-08-04 07:58:52,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.95833333333333) internal successors, (2039), 24 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:52,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:52,844 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:52,850 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 07:58:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 07:58:53,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:53,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1953040551, now seen corresponding path program 6 times [2023-08-04 07:58:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942336348] [2023-08-04 07:58:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:58:53,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:58:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:58:53,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:58:53,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:58:53,097 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:58:53,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 07:58:53,098 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1] [2023-08-04 07:58:53,100 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 07:58:53,101 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:58:53,102 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:58:53,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:58:53 BasicIcfg [2023-08-04 07:58:53,169 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:58:53,170 INFO L158 Benchmark]: Toolchain (without parser) took 37890.14ms. Allocated memory was 690.0MB in the beginning and 8.1GB in the end (delta: 7.4GB). Free memory was 638.0MB in the beginning and 6.7GB in the end (delta: -6.1GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-04 07:58:53,170 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 300.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:58:53,170 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.78ms. Allocated memory is still 690.0MB. Free memory was 637.6MB in the beginning and 618.0MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 07:58:53,170 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.27ms. Allocated memory is still 690.0MB. Free memory was 618.0MB in the beginning and 616.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:58:53,170 INFO L158 Benchmark]: Boogie Preprocessor took 29.53ms. Allocated memory is still 690.0MB. Free memory was 616.3MB in the beginning and 614.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:58:53,171 INFO L158 Benchmark]: RCFGBuilder took 312.54ms. Allocated memory is still 690.0MB. Free memory was 614.5MB in the beginning and 600.2MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 07:58:53,171 INFO L158 Benchmark]: TraceAbstraction took 37139.54ms. Allocated memory was 690.0MB in the beginning and 8.1GB in the end (delta: 7.4GB). Free memory was 599.5MB in the beginning and 6.7GB in the end (delta: -6.1GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-04 07:58:53,172 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 300.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 365.78ms. Allocated memory is still 690.0MB. Free memory was 637.6MB in the beginning and 618.0MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.27ms. Allocated memory is still 690.0MB. Free memory was 618.0MB in the beginning and 616.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.53ms. Allocated memory is still 690.0MB. Free memory was 616.3MB in the beginning and 614.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 312.54ms. Allocated memory is still 690.0MB. Free memory was 614.5MB in the beginning and 600.2MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 37139.54ms. Allocated memory was 690.0MB in the beginning and 8.1GB in the end (delta: 7.4GB). Free memory was 599.5MB in the beginning and 6.7GB in the end (delta: -6.1GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 78 PlacesBefore, 22 PlacesAfterwards, 80 TransitionsBefore, 20 TransitionsAfterwards, 1694 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 70 TotalNumberOfCompositions, 1481 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1302, independent: 1275, independent conditional: 0, independent unconditional: 1275, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 895, independent: 881, independent conditional: 0, independent unconditional: 881, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1302, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 895, unknown conditional: 0, unknown unconditional: 895] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 78 PlacesBefore, 22 PlacesAfterwards, 80 TransitionsBefore, 20 TransitionsAfterwards, 1694 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 70 TotalNumberOfCompositions, 1505 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1315, independent: 1288, independent conditional: 0, independent unconditional: 1288, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 890, independent: 876, independent conditional: 0, independent unconditional: 876, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1315, independent: 412, independent conditional: 0, independent unconditional: 412, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 890, unknown conditional: 0, unknown unconditional: 890] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 102 PlacesBefore, 34 PlacesAfterwards, 104 TransitionsBefore, 30 TransitionsAfterwards, 4444 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 86 TotalNumberOfCompositions, 3916 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3495, independent: 3465, independent conditional: 0, independent unconditional: 3465, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2282, independent: 2264, independent conditional: 0, independent unconditional: 2264, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3495, independent: 1201, independent conditional: 0, independent unconditional: 1201, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 2282, unknown conditional: 0, unknown unconditional: 2282] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1[2], id2[2]; [L713] 0 int asdf=0; VAL [\old(argc)=51, argc=51, argv={50:49}, argv={50:49}, asdf=0, i=3, id1={5:0}, id2={7:0}, j=6] [L713] COND TRUE 0 asdf<2 [L713] FCALL, FORK 0 pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, i=3, id1={5:0}, id2={7:0}, j=6, pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0))=9] [L713] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, i=3, id1={5:0}, id2={7:0}, j=6] [L713] COND TRUE 0 asdf<2 [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L713] FCALL, FORK 0 pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, i=3, id1={5:0}, id2={7:0}, j=6, k=0, pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0))=10] [L713] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0] [L713] COND FALSE 0 !(asdf<2) [L714] 0 int asdf=0; VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0] [L714] COND TRUE 0 asdf<2 [L714] FCALL, FORK 0 pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0, pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0))=11] [L714] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0] [L714] COND TRUE 0 asdf<2 [L704] 3 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L714] FCALL, FORK 0 pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0, k=0, pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0))=12] [L714] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, i=3, id1={5:0}, id2={7:0}, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L714] COND FALSE 0 !(asdf<2) [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, condI=0, i=15, id1={5:0}, id2={7:0}, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, condI=0, condJ=1, i=15, id1={5:0}, id2={7:0}, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 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: 2.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 60 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 113 IncrementalHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 1 mSDtfsCounter, 113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 78 SizeOfPredicates, 0 NumberOfNonLiveVariables, 191 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 4/8 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, 114 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: 32.6s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 26.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3530 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3409 mSDsluCounter, 412 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 388 mSDsCounter, 438 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3530 IncrementalHoareTripleChecker+Invalid, 3968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 438 mSolverCounterUnsat, 24 mSDtfsCounter, 3530 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 496 GetRequests, 305 SyntacticMatches, 13 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2404occurred in iteration=12, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 474 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 582 ConstructedInterpolants, 0 QuantifiedInterpolants, 1862 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1391 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 203/377 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, 94 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: 1.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-04 07:58:53,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...