/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:25:29,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:25:30,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:25:30,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:25:30,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:25:30,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:25:30,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:25:30,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:25:30,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:25:30,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:25:30,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:25:30,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:25:30,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:25:30,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:25:30,048 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:25:30,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:25:30,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:25:30,048 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:25:30,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:25:30,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:25:30,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:25:30,049 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:25:30,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:25:30,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:25:30,051 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:25:30,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:25:30,051 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:25:30,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:25:30,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:25:30,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:25:30,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:25:30,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:25:30,053 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:25:30,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:25:30,054 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:25:30,054 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:25:30,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:25:30,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:25:30,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:25:30,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:25:30,243 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:25:30,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i [2023-08-04 01:25:31,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:25:31,514 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:25:31,514 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i [2023-08-04 01:25:31,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bcc1f81/f0445a560c9540a7b0a68a6423324ddb/FLAGc0982bc49 [2023-08-04 01:25:31,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bcc1f81/f0445a560c9540a7b0a68a6423324ddb [2023-08-04 01:25:31,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:25:31,827 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:25:31,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:25:31,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:25:31,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:25:31,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:25:31" (1/1) ... [2023-08-04 01:25:31,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448f59f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:31, skipping insertion in model container [2023-08-04 01:25:31,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:25:31" (1/1) ... [2023-08-04 01:25:31,874 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:25:32,080 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_fib_safe-5_bound2.i[30241,30254] [2023-08-04 01:25:32,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:25:32,110 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:25:32,134 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-04 01:25:32,135 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-04 01:25:32,154 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_fib_safe-5_bound2.i[30241,30254] [2023-08-04 01:25:32,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:25:32,182 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:25:32,183 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:25:32,188 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:25:32,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32 WrapperNode [2023-08-04 01:25:32,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:25:32,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:25:32,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:25:32,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:25:32,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,228 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-04 01:25:32,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:25:32,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:25:32,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:25:32,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:25:32,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,237 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,247 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:25:32,248 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:25:32,248 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:25:32,248 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:25:32,248 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (1/1) ... [2023-08-04 01:25:32,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:25:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:32,295 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 01:25:32,297 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 01:25:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:25:32,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:25:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:25:32,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:25:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:25:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:25:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:25:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:25:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:25:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:25:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:25:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:25:32,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:25:32,327 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 01:25:32,415 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:25:32,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:25:32,525 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:25:32,529 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:25:32,530 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 01:25:32,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:25:32 BoogieIcfgContainer [2023-08-04 01:25:32,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:25:32,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:25:32,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:25:32,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:25:32,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:25:31" (1/3) ... [2023-08-04 01:25:32,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5934f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:25:32, skipping insertion in model container [2023-08-04 01:25:32,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:25:32" (2/3) ... [2023-08-04 01:25:32,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5934f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:25:32, skipping insertion in model container [2023-08-04 01:25:32,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:25:32" (3/3) ... [2023-08-04 01:25:32,546 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_safe-5_bound2.i [2023-08-04 01:25:32,551 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:25:32,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:25:32,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:25:32,557 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:25:32,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:25:32,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,684 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 01:25:32,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:25:32,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 01:25:32,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:25:32,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:25:32,779 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 01:25:32,779 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:25:32,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 01:25:32,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 01:25:35,363 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-04 01:25:35,364 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 01:25:35,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:25:35,378 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;@59643ba9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:25:35,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:25:35,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:25:35,383 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-04 01:25:35,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:25:35,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:35,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:25:35,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:25:35,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash -465714586, now seen corresponding path program 1 times [2023-08-04 01:25:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145414285] [2023-08-04 01:25:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:25:35,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:25:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:25:35,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:25:35,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:25:35,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:25:35,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:25:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:25:35,552 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:25:35,559 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:25:35,560 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:25:35,560 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:25:35,580 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:25:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,639 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:25:35,640 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:25:35,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:25:35,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:25:35,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:35,679 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:25:35,679 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:25:35,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:25:35,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 01:25:37,854 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-04 01:25:37,854 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 01:25:37,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:25:37,856 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;@59643ba9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:25:37,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:25:37,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:25:37,862 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2023-08-04 01:25:37,862 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 01:25:37,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:37,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:25:37,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:25:37,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 479947437, now seen corresponding path program 1 times [2023-08-04 01:25:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:37,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623515748] [2023-08-04 01:25:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:25:38,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:38,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623515748] [2023-08-04 01:25:38,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623515748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:38,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411797051] [2023-08-04 01:25:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:38,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:38,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:38,058 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 01:25:38,101 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 01:25:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:38,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:25:38,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:25:38,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:25:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411797051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:25:38,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:25:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181806692] [2023-08-04 01:25:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:38,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:38,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:25:38,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:38,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:38,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:38,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:38,522 INFO L124 PetriNetUnfolderBase]: 3357/5430 cut-off events. [2023-08-04 01:25:38,522 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-04 01:25:38,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 5430 events. 3357/5430 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 31273 event pairs, 988 based on Foata normal form. 0/4875 useless extension candidates. Maximal degree in co-relation 2971. Up to 4348 conditions per place. [2023-08-04 01:25:38,539 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 30 selfloop transitions, 5 changer transitions 4/54 dead transitions. [2023-08-04 01:25:38,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 206 flow [2023-08-04 01:25:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:25:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:25:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-08-04 01:25:38,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510548523206751 [2023-08-04 01:25:38,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-08-04 01:25:38,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-08-04 01:25:38,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:38,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-08-04 01:25:38,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,561 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 5 states and 605 transitions. [2023-08-04 01:25:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 206 flow [2023-08-04 01:25:38,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:38,565 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 114 flow [2023-08-04 01:25:38,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 01:25:38,568 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 01:25:38,568 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 114 flow [2023-08-04 01:25:38,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:38,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:25:38,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:38,773 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 01:25:38,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:25:38,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -870270021, now seen corresponding path program 1 times [2023-08-04 01:25:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860440521] [2023-08-04 01:25:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:25:38,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:38,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860440521] [2023-08-04 01:25:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860440521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:38,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:25:38,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:25:38,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450005929] [2023-08-04 01:25:38,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:38,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:25:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:25:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:25:38,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:25:38,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 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 01:25:38,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:38,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:25:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:38,963 INFO L124 PetriNetUnfolderBase]: 1495/2521 cut-off events. [2023-08-04 01:25:38,964 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-08-04 01:25:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 2521 events. 1495/2521 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13330 event pairs, 642 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 1471. Up to 1975 conditions per place. [2023-08-04 01:25:38,973 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 26 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-04 01:25:38,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 175 flow [2023-08-04 01:25:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:25:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:25:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 01:25:38,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203938115330521 [2023-08-04 01:25:38,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 01:25:38,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 01:25:38,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:38,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 01:25:38,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:38,977 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 114 flow. Second operand 3 states and 370 transitions. [2023-08-04 01:25:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 175 flow [2023-08-04 01:25:38,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:38,978 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 112 flow [2023-08-04 01:25:38,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-08-04 01:25:38,979 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 01:25:38,979 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 112 flow [2023-08-04 01:25:38,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 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 01:25:38,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:38,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:38,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:25:38,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:25:38,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash 340037557, now seen corresponding path program 1 times [2023-08-04 01:25:38,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:38,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598225317] [2023-08-04 01:25:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:25:39,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598225317] [2023-08-04 01:25:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598225317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951132308] [2023-08-04 01:25:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:39,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:39,027 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 01:25:39,056 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 01:25:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:39,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:25:39,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:25:39,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:25:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951132308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:39,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:25:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427408607] [2023-08-04 01:25:39,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:39,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:39,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:39,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:39,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:39,250 INFO L124 PetriNetUnfolderBase]: 1216/1990 cut-off events. [2023-08-04 01:25:39,250 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 01:25:39,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3751 conditions, 1990 events. 1216/1990 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9633 event pairs, 306 based on Foata normal form. 3/1961 useless extension candidates. Maximal degree in co-relation 1484. Up to 1549 conditions per place. [2023-08-04 01:25:39,258 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 30 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 01:25:39,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 195 flow [2023-08-04 01:25:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:25:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:25:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-04 01:25:39,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126582278481012 [2023-08-04 01:25:39,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-04 01:25:39,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-04 01:25:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:39,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-04 01:25:39,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,262 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 112 flow. Second operand 4 states and 486 transitions. [2023-08-04 01:25:39,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 195 flow [2023-08-04 01:25:39,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:25:39,264 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 109 flow [2023-08-04 01:25:39,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-04 01:25:39,264 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 01:25:39,264 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 109 flow [2023-08-04 01:25:39,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:39,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:39,283 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 01:25:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:25:39,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:25:39,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:39,470 INFO L85 PathProgramCache]: Analyzing trace with hash 535273550, now seen corresponding path program 1 times [2023-08-04 01:25:39,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:39,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385224443] [2023-08-04 01:25:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:39,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:25:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385224443] [2023-08-04 01:25:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385224443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950985996] [2023-08-04 01:25:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:39,527 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 01:25:39,529 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 01:25:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:39,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:25:39,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:25:39,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:25:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950985996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:25:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:25:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295862754] [2023-08-04 01:25:39,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:25:39,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:39,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:39,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:39,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:39,745 INFO L124 PetriNetUnfolderBase]: 892/1357 cut-off events. [2023-08-04 01:25:39,745 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-08-04 01:25:39,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1357 events. 892/1357 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5175 event pairs, 22 based on Foata normal form. 81/1422 useless extension candidates. Maximal degree in co-relation 1060. Up to 567 conditions per place. [2023-08-04 01:25:39,747 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-08-04 01:25:39,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 267 flow [2023-08-04 01:25:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:25:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:25:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-08-04 01:25:39,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5206751054852321 [2023-08-04 01:25:39,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-08-04 01:25:39,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-08-04 01:25:39,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:39,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-08-04 01:25:39,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,752 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 109 flow. Second operand 5 states and 617 transitions. [2023-08-04 01:25:39,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 267 flow [2023-08-04 01:25:39,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:25:39,753 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-04 01:25:39,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-04 01:25:39,754 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 01:25:39,754 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-04 01:25:39,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:39,755 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:25:39,755 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:25:39,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:39,959 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:25:39,959 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:25:39,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:39,993 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:25:39,993 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:25:39,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:25:39,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:39,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:39,996 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:25:39,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:39,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:39,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:25:40,019 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:25:40,019 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:25:40,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:25:40,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 01:25:42,015 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-04 01:25:42,015 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 01:25:42,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:25:42,017 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;@59643ba9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:25:42,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:25:42,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:25:42,018 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 01:25:42,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:25:42,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:42,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 01:25:42,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:42,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 24206885, now seen corresponding path program 1 times [2023-08-04 01:25:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:42,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649929628] [2023-08-04 01:25:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:42,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:42,046 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 01:25:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649929628] [2023-08-04 01:25:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649929628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:25:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:25:42,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164300331] [2023-08-04 01:25:42,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:42,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:25:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:25:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:25:42,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:25:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:25:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:42,287 INFO L124 PetriNetUnfolderBase]: 3244/5230 cut-off events. [2023-08-04 01:25:42,287 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 01:25:42,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9663 conditions, 5230 events. 3244/5230 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29355 event pairs, 1386 based on Foata normal form. 0/4639 useless extension candidates. Maximal degree in co-relation 3014. Up to 4201 conditions per place. [2023-08-04 01:25:42,306 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2023-08-04 01:25:42,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-04 01:25:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:25:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:25:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 01:25:42,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-04 01:25:42,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 01:25:42,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 01:25:42,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:42,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 01:25:42,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,314 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-04 01:25:42,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-04 01:25:42,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 01:25:42,316 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 106 flow [2023-08-04 01:25:42,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 01:25:42,318 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 01:25:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 106 flow [2023-08-04 01:25:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:42,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:25:42,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:42,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash -442104601, now seen corresponding path program 1 times [2023-08-04 01:25:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614588727] [2023-08-04 01:25:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:42,354 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 01:25:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614588727] [2023-08-04 01:25:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614588727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671438204] [2023-08-04 01:25:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:42,355 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 01:25:42,394 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 01:25:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:42,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:25:42,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:42,428 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 01:25:42,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:25:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671438204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:42,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:25:42,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:25:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491432303] [2023-08-04 01:25:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:25:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:25:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:42,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:25:42,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:42,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:25:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:42,620 INFO L124 PetriNetUnfolderBase]: 2665/4138 cut-off events. [2023-08-04 01:25:42,620 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 01:25:42,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7764 conditions, 4138 events. 2665/4138 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20626 event pairs, 1120 based on Foata normal form. 0/3788 useless extension candidates. Maximal degree in co-relation 7725. Up to 3271 conditions per place. [2023-08-04 01:25:42,632 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 01:25:42,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 202 flow [2023-08-04 01:25:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:25:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:25:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 01:25:42,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 01:25:42,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 01:25:42,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 01:25:42,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:42,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 01:25:42,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,636 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 106 flow. Second operand 3 states and 379 transitions. [2023-08-04 01:25:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 202 flow [2023-08-04 01:25:42,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:42,637 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 116 flow [2023-08-04 01:25:42,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-04 01:25:42,637 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 01:25:42,637 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 116 flow [2023-08-04 01:25:42,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:42,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:42,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 01:25:42,841 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 01:25:42,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:42,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -240849557, now seen corresponding path program 1 times [2023-08-04 01:25:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:42,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637476043] [2023-08-04 01:25:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:42,874 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 01:25:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637476043] [2023-08-04 01:25:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637476043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934966643] [2023-08-04 01:25:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:42,876 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 01:25:42,878 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 01:25:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:42,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:25:42,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:25:42,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:25:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934966643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:25:42,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:25:42,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 01:25:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290340021] [2023-08-04 01:25:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:25:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:25:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:25:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:42,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:25:42,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:42,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:42,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:25:42,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:43,182 INFO L124 PetriNetUnfolderBase]: 3169/4738 cut-off events. [2023-08-04 01:25:43,183 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-08-04 01:25:43,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4738 events. 3169/4738 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22999 event pairs, 1310 based on Foata normal form. 0/4489 useless extension candidates. Maximal degree in co-relation 2910. Up to 2655 conditions per place. [2023-08-04 01:25:43,200 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 38 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 01:25:43,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 222 flow [2023-08-04 01:25:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:25:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:25:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-04 01:25:43,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-04 01:25:43,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-04 01:25:43,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-04 01:25:43,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:43,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-04 01:25:43,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,206 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 116 flow. Second operand 3 states and 381 transitions. [2023-08-04 01:25:43,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 222 flow [2023-08-04 01:25:43,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:43,208 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 126 flow [2023-08-04 01:25:43,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 01:25:43,208 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 01:25:43,209 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 126 flow [2023-08-04 01:25:43,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:43,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:43,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:43,413 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 01:25:43,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:43,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1123599108, now seen corresponding path program 1 times [2023-08-04 01:25:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719848184] [2023-08-04 01:25:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:43,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:25:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719848184] [2023-08-04 01:25:43,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719848184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212849092] [2023-08-04 01:25:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:43,442 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 01:25:43,444 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 01:25:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:43,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:25:43,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:25:43,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:25:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212849092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:43,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:43,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:25:43,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700111274] [2023-08-04 01:25:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:43,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:43,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:43,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:43,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:43,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:43,712 INFO L124 PetriNetUnfolderBase]: 2557/3808 cut-off events. [2023-08-04 01:25:43,712 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2023-08-04 01:25:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 3808 events. 2557/3808 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17633 event pairs, 690 based on Foata normal form. 3/3626 useless extension candidates. Maximal degree in co-relation 5074. Up to 3196 conditions per place. [2023-08-04 01:25:43,724 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 35 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 01:25:43,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 226 flow [2023-08-04 01:25:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:25:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:25:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 01:25:43,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168776371308017 [2023-08-04 01:25:43,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 01:25:43,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 01:25:43,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:43,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 01:25:43,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,728 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 126 flow. Second operand 4 states and 490 transitions. [2023-08-04 01:25:43,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 226 flow [2023-08-04 01:25:43,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:43,729 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 138 flow [2023-08-04 01:25:43,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-04 01:25:43,730 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 01:25:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 138 flow [2023-08-04 01:25:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:43,736 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 01:25:43,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:43,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:43,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 757811523, now seen corresponding path program 1 times [2023-08-04 01:25:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478456651] [2023-08-04 01:25:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:43,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:25:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:43,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478456651] [2023-08-04 01:25:43,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478456651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:43,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467108441] [2023-08-04 01:25:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:43,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:43,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:43,961 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 01:25:43,989 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 01:25:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:44,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:25:44,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:25:44,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:25:44,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467108441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:44,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:25:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013868823] [2023-08-04 01:25:44,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:44,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:44,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 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 01:25:44,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:44,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:44,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:44,287 INFO L124 PetriNetUnfolderBase]: 2269/3139 cut-off events. [2023-08-04 01:25:44,287 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 01:25:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6643 conditions, 3139 events. 2269/3139 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11836 event pairs, 508 based on Foata normal form. 27/3042 useless extension candidates. Maximal degree in co-relation 4601. Up to 1768 conditions per place. [2023-08-04 01:25:44,297 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 01:25:44,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 286 flow [2023-08-04 01:25:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:25:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:25:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 01:25:44,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-04 01:25:44,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 01:25:44,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 01:25:44,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:44,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 01:25:44,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,302 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 138 flow. Second operand 4 states and 502 transitions. [2023-08-04 01:25:44,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 286 flow [2023-08-04 01:25:44,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 279 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:25:44,304 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 145 flow [2023-08-04 01:25:44,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-04 01:25:44,305 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 01:25:44,305 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 145 flow [2023-08-04 01:25:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 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 01:25:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:44,333 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 01:25:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:44,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:44,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1309232034, now seen corresponding path program 1 times [2023-08-04 01:25:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:44,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823219944] [2023-08-04 01:25:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823219944] [2023-08-04 01:25:44,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823219944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440831310] [2023-08-04 01:25:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:44,567 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 01:25:44,567 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 01:25:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:44,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:25:44,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:44,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440831310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:44,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:44,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 01:25:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847040363] [2023-08-04 01:25:44,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 01:25:44,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 01:25:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 01:25:44,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:44,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:44,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:44,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:44,879 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-04 01:25:44,880 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-08-04 01:25:44,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4003 events. 2917/4003 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15093 event pairs, 784 based on Foata normal form. 0/3858 useless extension candidates. Maximal degree in co-relation 4151. Up to 1587 conditions per place. [2023-08-04 01:25:44,897 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-04 01:25:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 411 flow [2023-08-04 01:25:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 01:25:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 01:25:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-04 01:25:44,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 01:25:44,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-04 01:25:44,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-04 01:25:44,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:44,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-04 01:25:44,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,902 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,902 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 145 flow. Second operand 6 states and 758 transitions. [2023-08-04 01:25:44,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 411 flow [2023-08-04 01:25:44,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 404 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:25:44,905 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 174 flow [2023-08-04 01:25:44,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 01:25:44,905 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-04 01:25:44,905 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 174 flow [2023-08-04 01:25:44,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:44,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:44,906 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:44,930 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 01:25:45,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 01:25:45,111 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:45,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash -732732399, now seen corresponding path program 2 times [2023-08-04 01:25:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:45,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985050852] [2023-08-04 01:25:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:45,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985050852] [2023-08-04 01:25:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985050852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212134760] [2023-08-04 01:25:45,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:25:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:45,203 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 01:25:45,228 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 01:25:45,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:25:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:25:45,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 01:25:45,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:45,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:45,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212134760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:45,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:45,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 01:25:45,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451037254] [2023-08-04 01:25:45,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:45,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 01:25:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 01:25:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-04 01:25:45,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:45,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 174 flow. Second operand has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:45,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:45,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:45,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:45,751 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-04 01:25:45,752 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 01:25:45,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 6433 events. 4861/6433 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22797 event pairs, 784 based on Foata normal form. 486/6855 useless extension candidates. Maximal degree in co-relation 6011. Up to 1587 conditions per place. [2023-08-04 01:25:45,785 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-04 01:25:45,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 171 transitions, 764 flow [2023-08-04 01:25:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 01:25:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 01:25:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-04 01:25:45,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-04 01:25:45,789 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-04 01:25:45,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-04 01:25:45,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:45,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-04 01:25:45,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.41666666666667) internal successors, (1517), 12 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:45,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:45,795 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:45,796 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 174 flow. Second operand 12 states and 1517 transitions. [2023-08-04 01:25:45,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 171 transitions, 764 flow [2023-08-04 01:25:45,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 171 transitions, 750 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:45,803 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 244 flow [2023-08-04 01:25:45,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 01:25:45,804 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 01:25:45,804 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 244 flow [2023-08-04 01:25:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:45,805 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:45,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:46,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:46,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:46,010 INFO L85 PathProgramCache]: Analyzing trace with hash -517041935, now seen corresponding path program 3 times [2023-08-04 01:25:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260114048] [2023-08-04 01:25:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:46,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:46,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260114048] [2023-08-04 01:25:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260114048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885209464] [2023-08-04 01:25:46,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 01:25:46,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:46,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:46,189 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 01:25:46,190 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 01:25:46,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 01:25:46,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:25:46,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 01:25:46,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:46,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885209464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:46,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:46,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-08-04 01:25:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828889689] [2023-08-04 01:25:46,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 01:25:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 01:25:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-08-04 01:25:46,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:25:46,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:46,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:46,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:25:46,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:46,837 INFO L124 PetriNetUnfolderBase]: 5509/7243 cut-off events. [2023-08-04 01:25:46,838 INFO L125 PetriNetUnfolderBase]: For 9187/9187 co-relation queries the response was YES. [2023-08-04 01:25:46,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18910 conditions, 7243 events. 5509/7243 cut-off events. For 9187/9187 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 25366 event pairs, 784 based on Foata normal form. 162/7341 useless extension candidates. Maximal degree in co-relation 12491. Up to 1587 conditions per place. [2023-08-04 01:25:46,872 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 170 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2023-08-04 01:25:46,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 914 flow [2023-08-04 01:25:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 01:25:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 01:25:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1765 transitions. [2023-08-04 01:25:46,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319469559975889 [2023-08-04 01:25:46,875 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1765 transitions. [2023-08-04 01:25:46,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1765 transitions. [2023-08-04 01:25:46,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:46,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1765 transitions. [2023-08-04 01:25:46,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.07142857142857) internal successors, (1765), 14 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:46,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:46,882 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:46,882 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 244 flow. Second operand 14 states and 1765 transitions. [2023-08-04 01:25:46,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 914 flow [2023-08-04 01:25:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 197 transitions, 862 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-08-04 01:25:46,899 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 244 flow [2023-08-04 01:25:46,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2023-08-04 01:25:46,899 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2023-08-04 01:25:46,900 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 244 flow [2023-08-04 01:25:46,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:46,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:46,900 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:46,905 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 01:25:47,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 01:25:47,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:47,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:47,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1338931857, now seen corresponding path program 4 times [2023-08-04 01:25:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:47,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710683898] [2023-08-04 01:25:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:47,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710683898] [2023-08-04 01:25:47,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710683898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:47,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112555348] [2023-08-04 01:25:47,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 01:25:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:47,601 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 01:25:47,622 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 01:25:47,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 01:25:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:25:47,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 01:25:47,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:48,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:25:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112555348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:48,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-04 01:25:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105572044] [2023-08-04 01:25:48,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-04 01:25:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-04 01:25:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2023-08-04 01:25:49,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-04 01:25:49,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 244 flow. Second operand has 41 states, 41 states have (on average 107.7560975609756) internal successors, (4418), 41 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:49,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-04 01:25:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:27:15,439 INFO L124 PetriNetUnfolderBase]: 810184/1089748 cut-off events. [2023-08-04 01:27:15,439 INFO L125 PetriNetUnfolderBase]: For 1755291/1755291 co-relation queries the response was YES. [2023-08-04 01:27:20,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802309 conditions, 1089748 events. 810184/1089748 cut-off events. For 1755291/1755291 co-relation queries the response was YES. Maximal size of possible extension queue 25699. Compared 8635140 event pairs, 2040 based on Foata normal form. 3234/1092981 useless extension candidates. Maximal degree in co-relation 2040100. Up to 99943 conditions per place. [2023-08-04 01:27:25,823 INFO L140 encePairwiseOnDemand]: 230/237 looper letters, 1375 selfloop transitions, 1133 changer transitions 0/2518 dead transitions. [2023-08-04 01:27:25,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 2518 transitions, 15789 flow [2023-08-04 01:27:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-04 01:27:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-04 01:27:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 13121 transitions. [2023-08-04 01:27:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222912188520022 [2023-08-04 01:27:25,875 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 13121 transitions. [2023-08-04 01:27:25,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 13121 transitions. [2023-08-04 01:27:25,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:27:25,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 13121 transitions. [2023-08-04 01:27:25,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 123.78301886792453) internal successors, (13121), 106 states have internal predecessors, (13121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:25,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 237.0) internal successors, (25359), 107 states have internal predecessors, (25359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:25,979 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 237.0) internal successors, (25359), 107 states have internal predecessors, (25359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:25,980 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 244 flow. Second operand 106 states and 13121 transitions. [2023-08-04 01:27:25,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 2518 transitions, 15789 flow