/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:19:56,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:19:56,504 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:19:56,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:19:56,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:19:56,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:19:56,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:19:56,533 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:19:56,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:19:56,537 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:19:56,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:19:56,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:19:56,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:19:56,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:19:56,538 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:19:56,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:19:56,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:19:56,539 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:19:56,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:19:56,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:19:56,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:19:56,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:19:56,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:19:56,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:19:56,541 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:19:56,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:19:56,541 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:19:56,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:19:56,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:19:56,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:19:56,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:56,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:19:56,543 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:19:56,544 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:19:56,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:19:56,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:19:56,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:19:56,722 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:19:56,722 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:19:56,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-subst.wvr_bound2.c [2023-08-04 08:19:57,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:19:57,878 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:19:57,879 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-subst.wvr_bound2.c [2023-08-04 08:19:57,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19b70858/9ef827570b1a4d6d82189f98bc95a0e2/FLAG290118d0b [2023-08-04 08:19:57,891 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19b70858/9ef827570b1a4d6d82189f98bc95a0e2 [2023-08-04 08:19:57,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:19:57,894 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:19:57,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:57,894 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:19:57,899 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:19:57,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:57" (1/1) ... [2023-08-04 08:19:57,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e60cec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:57, skipping insertion in model container [2023-08-04 08:19:57,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:57" (1/1) ... [2023-08-04 08:19:57,914 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:19:58,016 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-subst.wvr_bound2.c[3787,3800] [2023-08-04 08:19:58,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:58,026 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:19:58,045 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-subst.wvr_bound2.c[3787,3800] [2023-08-04 08:19:58,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:58,052 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:19:58,052 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:19:58,056 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:19:58,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58 WrapperNode [2023-08-04 08:19:58,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:58,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:58,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:19:58,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:19:58,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,067 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,089 INFO L138 Inliner]: procedures = 23, calls = 46, calls flagged for inlining = 18, calls inlined = 40, statements flattened = 413 [2023-08-04 08:19:58,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:58,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:19:58,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:19:58,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:19:58,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:19:58,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:19:58,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:19:58,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:19:58,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (1/1) ... [2023-08-04 08:19:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:58,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:19:58,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:19:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:19:58,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:19:58,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:19:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:19:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:19:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:19:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:19:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:19:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:19:58,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:19:58,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:19:58,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:19:58,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:19:58,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:19:58,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:19:58,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:19:58,199 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:19:58,305 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:19:58,306 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:19:58,753 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:19:59,137 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:19:59,138 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:19:59,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:59 BoogieIcfgContainer [2023-08-04 08:19:59,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:19:59,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:19:59,142 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:19:59,145 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:19:59,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:19:57" (1/3) ... [2023-08-04 08:19:59,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0f2d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:59, skipping insertion in model container [2023-08-04 08:19:59,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:58" (2/3) ... [2023-08-04 08:19:59,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0f2d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:59, skipping insertion in model container [2023-08-04 08:19:59,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:59" (3/3) ... [2023-08-04 08:19:59,148 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-collitem-subst.wvr_bound2.c [2023-08-04 08:19:59,155 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:19:59,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:19:59,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:19:59,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:19:59,245 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:19:59,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 186 transitions, 414 flow [2023-08-04 08:19:59,476 INFO L124 PetriNetUnfolderBase]: 90/668 cut-off events. [2023-08-04 08:19:59,476 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:19:59,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 668 events. 90/668 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3143 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 397. Up to 16 conditions per place. [2023-08-04 08:19:59,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 186 transitions, 414 flow [2023-08-04 08:19:59,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 173 transitions, 382 flow [2023-08-04 08:19:59,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:59,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 173 transitions, 382 flow [2023-08-04 08:19:59,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 173 transitions, 382 flow [2023-08-04 08:19:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 173 transitions, 382 flow [2023-08-04 08:19:59,555 INFO L124 PetriNetUnfolderBase]: 90/581 cut-off events. [2023-08-04 08:19:59,556 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:19:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 581 events. 90/581 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2497 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 351. Up to 16 conditions per place. [2023-08-04 08:19:59,561 INFO L119 LiptonReduction]: Number of co-enabled transitions 1332 [2023-08-04 08:20:08,202 INFO L134 LiptonReduction]: Checked pairs total: 4711 [2023-08-04 08:20:08,202 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-04 08:20:08,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:20:08,223 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;@7f73b791, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:20:08,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:20:08,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:20:08,231 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:20:08,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:20:08,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:08,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:08,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:08,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1332451339, now seen corresponding path program 1 times [2023-08-04 08:20:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:08,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808428890] [2023-08-04 08:20:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:08,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:20:08,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:08,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808428890] [2023-08-04 08:20:08,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808428890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:08,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:08,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:20:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3247611] [2023-08-04 08:20:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:08,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:20:08,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:08,787 INFO L124 PetriNetUnfolderBase]: 399/801 cut-off events. [2023-08-04 08:20:08,788 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-04 08:20:08,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 801 events. 399/801 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3989 event pairs, 206 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 1162. Up to 741 conditions per place. [2023-08-04 08:20:08,792 INFO L140 encePairwiseOnDemand]: 331/335 looper letters, 34 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:20:08,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 190 flow [2023-08-04 08:20:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-04 08:20:08,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104477611940299 [2023-08-04 08:20:08,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-04 08:20:08,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-04 08:20:08,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:08,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-04 08:20:08,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,814 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 114 flow. Second operand 3 states and 513 transitions. [2023-08-04 08:20:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 190 flow [2023-08-04 08:20:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:20:08,818 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 108 flow [2023-08-04 08:20:08,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-08-04 08:20:08,821 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-04 08:20:08,821 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 108 flow [2023-08-04 08:20:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:08,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:20:08,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:08,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 290467920, now seen corresponding path program 1 times [2023-08-04 08:20:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791649412] [2023-08-04 08:20:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:20:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791649412] [2023-08-04 08:20:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791649412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641853568] [2023-08-04 08:20:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:08,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:08,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:08,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:20:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:09,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:09,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:09,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:09,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641853568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:09,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:09,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:09,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224150033] [2023-08-04 08:20:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:09,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:09,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:09,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:09,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:09,214 INFO L124 PetriNetUnfolderBase]: 381/767 cut-off events. [2023-08-04 08:20:09,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:20:09,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 767 events. 381/767 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3641 event pairs, 207 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1554. Up to 699 conditions per place. [2023-08-04 08:20:09,217 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 08:20:09,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 190 flow [2023-08-04 08:20:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-04 08:20:09,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104477611940299 [2023-08-04 08:20:09,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-04 08:20:09,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-04 08:20:09,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:09,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-04 08:20:09,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,223 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 108 flow. Second operand 3 states and 513 transitions. [2023-08-04 08:20:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 190 flow [2023-08-04 08:20:09,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:20:09,225 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 112 flow [2023-08-04 08:20:09,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-08-04 08:20:09,225 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-08-04 08:20:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 112 flow [2023-08-04 08:20:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:09,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:09,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:09,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:09,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:09,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1482962658, now seen corresponding path program 1 times [2023-08-04 08:20:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651964611] [2023-08-04 08:20:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:09,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:09,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651964611] [2023-08-04 08:20:09,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651964611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:09,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962943198] [2023-08-04 08:20:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:09,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:09,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:09,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:20:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:09,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:09,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:20:09,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962943198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:09,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586880700] [2023-08-04 08:20:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:09,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:09,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:09,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:09,788 INFO L124 PetriNetUnfolderBase]: 377/763 cut-off events. [2023-08-04 08:20:09,788 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 08:20:09,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 763 events. 377/763 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3337 event pairs, 212 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 898. Up to 675 conditions per place. [2023-08-04 08:20:09,791 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 36 selfloop transitions, 2 changer transitions 1/42 dead transitions. [2023-08-04 08:20:09,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 198 flow [2023-08-04 08:20:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-04 08:20:09,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114427860696518 [2023-08-04 08:20:09,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-04 08:20:09,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-04 08:20:09,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:09,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-04 08:20:09,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,796 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 112 flow. Second operand 3 states and 514 transitions. [2023-08-04 08:20:09,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 198 flow [2023-08-04 08:20:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:20:09,797 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 116 flow [2023-08-04 08:20:09,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-04 08:20:09,798 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-04 08:20:09,798 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 116 flow [2023-08-04 08:20:09,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:09,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:09,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:10,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:20:10,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:10,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1503928001, now seen corresponding path program 1 times [2023-08-04 08:20:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:10,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580151372] [2023-08-04 08:20:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:20:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580151372] [2023-08-04 08:20:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580151372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513913277] [2023-08-04 08:20:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:10,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:10,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:20:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:10,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:10,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:20:10,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513913277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:10,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701511391] [2023-08-04 08:20:10,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:10,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:10,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:10,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:10,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:10,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:10,416 INFO L124 PetriNetUnfolderBase]: 257/547 cut-off events. [2023-08-04 08:20:10,416 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-04 08:20:10,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 547 events. 257/547 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2192 event pairs, 184 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 694. Up to 451 conditions per place. [2023-08-04 08:20:10,418 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:20:10,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 224 flow [2023-08-04 08:20:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 08:20:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154228855721393 [2023-08-04 08:20:10,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 08:20:10,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 08:20:10,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:10,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 08:20:10,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,425 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 116 flow. Second operand 3 states and 518 transitions. [2023-08-04 08:20:10,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 224 flow [2023-08-04 08:20:10,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:20:10,427 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 124 flow [2023-08-04 08:20:10,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-04 08:20:10,428 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 08:20:10,428 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 124 flow [2023-08-04 08:20:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:10,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:10,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:10,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:10,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash -530639905, now seen corresponding path program 1 times [2023-08-04 08:20:10,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:10,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284009239] [2023-08-04 08:20:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:20:10,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284009239] [2023-08-04 08:20:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284009239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100085619] [2023-08-04 08:20:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:10,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:10,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:10,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:20:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:10,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:10,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:20:10,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100085619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624410320] [2023-08-04 08:20:10,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:10,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:10,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:11,046 INFO L124 PetriNetUnfolderBase]: 196/442 cut-off events. [2023-08-04 08:20:11,047 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:20:11,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 442 events. 196/442 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1628 event pairs, 149 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 599. Up to 329 conditions per place. [2023-08-04 08:20:11,048 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 42 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 08:20:11,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 234 flow [2023-08-04 08:20:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 08:20:11,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154228855721393 [2023-08-04 08:20:11,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 08:20:11,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 08:20:11,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:11,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 08:20:11,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,053 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 124 flow. Second operand 3 states and 518 transitions. [2023-08-04 08:20:11,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 234 flow [2023-08-04 08:20:11,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:11,054 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 134 flow [2023-08-04 08:20:11,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-04 08:20:11,055 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-04 08:20:11,055 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 134 flow [2023-08-04 08:20:11,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:11,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:20:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:11,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:11,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1923274431, now seen corresponding path program 1 times [2023-08-04 08:20:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863318657] [2023-08-04 08:20:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:20:11,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863318657] [2023-08-04 08:20:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863318657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454532397] [2023-08-04 08:20:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:11,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:11,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:11,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:20:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:11,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:11,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:11,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454532397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:11,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232489454] [2023-08-04 08:20:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:11,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 335 [2023-08-04 08:20:11,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:11,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 335 [2023-08-04 08:20:11,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:11,606 INFO L124 PetriNetUnfolderBase]: 189/425 cut-off events. [2023-08-04 08:20:11,606 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-04 08:20:11,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 425 events. 189/425 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1527 event pairs, 171 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 628. Up to 375 conditions per place. [2023-08-04 08:20:11,608 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 36 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2023-08-04 08:20:11,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 224 flow [2023-08-04 08:20:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-04 08:20:11,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114427860696518 [2023-08-04 08:20:11,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-04 08:20:11,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-04 08:20:11,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:11,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-04 08:20:11,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,636 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 134 flow. Second operand 3 states and 514 transitions. [2023-08-04 08:20:11,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 224 flow [2023-08-04 08:20:11,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:11,638 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 132 flow [2023-08-04 08:20:11,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-04 08:20:11,639 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-04 08:20:11,639 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 132 flow [2023-08-04 08:20:11,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:11,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:11,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:11,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:11,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:11,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:11,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1670972673, now seen corresponding path program 1 times [2023-08-04 08:20:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:11,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268117160] [2023-08-04 08:20:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:11,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268117160] [2023-08-04 08:20:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268117160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765365766] [2023-08-04 08:20:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:11,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:11,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:11,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:20:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:12,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:20:12,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:12,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:20:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:12,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765365766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:20:12,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:20:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:20:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966995319] [2023-08-04 08:20:12,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:20:12,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:20:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:20:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 335 [2023-08-04 08:20:12,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:12,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:12,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 335 [2023-08-04 08:20:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:12,181 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:20:12,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:20:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:20:12,181 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:20:12,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:20:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:20:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:20:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-04 08:20:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746268656716418 [2023-08-04 08:20:12,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-04 08:20:12,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-04 08:20:12,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:12,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-04 08:20:12,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:12,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:12,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:12,186 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 132 flow. Second operand 4 states and 636 transitions. [2023-08-04 08:20:12,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:20:12,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:12,186 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:20:12,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:20:12,186 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -18 predicate places. [2023-08-04 08:20:12,186 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:20:12,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:12,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:20:12,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:12,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:12,394 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:12,395 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:20:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 186 transitions, 414 flow [2023-08-04 08:20:12,432 INFO L124 PetriNetUnfolderBase]: 90/668 cut-off events. [2023-08-04 08:20:12,432 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:20:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 668 events. 90/668 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3143 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 397. Up to 16 conditions per place. [2023-08-04 08:20:12,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 186 transitions, 414 flow [2023-08-04 08:20:12,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 124 transitions, 263 flow [2023-08-04 08:20:12,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:20:12,433 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 124 transitions, 263 flow [2023-08-04 08:20:12,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 124 transitions, 263 flow [2023-08-04 08:20:12,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 124 transitions, 263 flow [2023-08-04 08:20:12,445 INFO L124 PetriNetUnfolderBase]: 6/220 cut-off events. [2023-08-04 08:20:12,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:20:12,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 220 events. 6/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 424 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-04 08:20:12,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 486 [2023-08-04 08:20:20,023 INFO L134 LiptonReduction]: Checked pairs total: 343 [2023-08-04 08:20:20,023 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 08:20:20,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:20:20,025 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;@7f73b791, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:20:20,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:20:20,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:20:20,030 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 08:20:20,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:20:20,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:20,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:20:20,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:20:20,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash 983915355, now seen corresponding path program 1 times [2023-08-04 08:20:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078409552] [2023-08-04 08:20:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:20,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:20,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078409552] [2023-08-04 08:20:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078409552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:20,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:20:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937444288] [2023-08-04 08:20:20,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:20:20,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 297 [2023-08-04 08:20:20,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:20,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:20,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 297 [2023-08-04 08:20:20,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:20,152 INFO L124 PetriNetUnfolderBase]: 45/115 cut-off events. [2023-08-04 08:20:20,153 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:20:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 115 events. 45/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 20 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 236. Up to 96 conditions per place. [2023-08-04 08:20:20,154 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-04 08:20:20,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 85 flow [2023-08-04 08:20:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-04 08:20:20,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510662177328844 [2023-08-04 08:20:20,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-04 08:20:20,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-04 08:20:20,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:20,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-04 08:20:20,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:20,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:20,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:20,160 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 49 flow. Second operand 3 states and 491 transitions. [2023-08-04 08:20:20,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 85 flow [2023-08-04 08:20:20,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:20:20,161 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 57 flow [2023-08-04 08:20:20,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-04 08:20:20,164 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-04 08:20:20,164 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 57 flow [2023-08-04 08:20:20,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:20,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:20,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:20:20,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:20:20,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:20:20,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1011531019, now seen corresponding path program 1 times [2023-08-04 08:20:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552945984] [2023-08-04 08:20:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:20:20,188 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:20:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:20:20,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:20:20,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:20:20,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:20:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:20:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:20:20,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:20:20,219 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:20:20,219 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:20:20,220 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:20:20,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:20:20,289 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:20:20,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 207 transitions, 504 flow [2023-08-04 08:20:20,712 INFO L124 PetriNetUnfolderBase]: 898/4360 cut-off events. [2023-08-04 08:20:20,713 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:20:20,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 4360 events. 898/4360 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35087 event pairs, 11 based on Foata normal form. 0/3706 useless extension candidates. Maximal degree in co-relation 2512. Up to 192 conditions per place. [2023-08-04 08:20:20,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 207 transitions, 504 flow [2023-08-04 08:20:20,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 194 transitions, 466 flow [2023-08-04 08:20:20,726 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:20:20,726 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 194 transitions, 466 flow [2023-08-04 08:20:20,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 194 transitions, 466 flow [2023-08-04 08:20:20,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 194 transitions, 466 flow [2023-08-04 08:20:20,972 INFO L124 PetriNetUnfolderBase]: 898/3707 cut-off events. [2023-08-04 08:20:20,972 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-08-04 08:20:20,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4355 conditions, 3707 events. 898/3707 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 27450 event pairs, 11 based on Foata normal form. 0/3117 useless extension candidates. Maximal degree in co-relation 2171. Up to 192 conditions per place. [2023-08-04 08:20:21,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 3204 [2023-08-04 08:20:34,130 INFO L134 LiptonReduction]: Checked pairs total: 14512 [2023-08-04 08:20:34,131 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-04 08:20:34,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:20:34,153 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;@7f73b791, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:20:34,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:20:34,171 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:20:34,171 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:20:34,171 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:20:34,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:34,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:34,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:34,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash -458773912, now seen corresponding path program 1 times [2023-08-04 08:20:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:34,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081943614] [2023-08-04 08:20:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:20:34,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081943614] [2023-08-04 08:20:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081943614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:34,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:34,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:20:34,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223090327] [2023-08-04 08:20:34,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:34,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:34,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:20:34,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:20:34,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:34,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:34,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:20:34,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:42,002 INFO L124 PetriNetUnfolderBase]: 21389/32078 cut-off events. [2023-08-04 08:20:42,003 INFO L125 PetriNetUnfolderBase]: For 7068/7068 co-relation queries the response was YES. [2023-08-04 08:20:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67048 conditions, 32078 events. 21389/32078 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 202828 event pairs, 14517 based on Foata normal form. 0/29510 useless extension candidates. Maximal degree in co-relation 27070. Up to 30193 conditions per place. [2023-08-04 08:20:42,203 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 08:20:42,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 302 flow [2023-08-04 08:20:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-04 08:20:42,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2023-08-04 08:20:42,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-04 08:20:42,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-04 08:20:42,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:42,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-04 08:20:42,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:42,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:42,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:42,209 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 192 flow. Second operand 3 states and 547 transitions. [2023-08-04 08:20:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 302 flow [2023-08-04 08:20:42,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 290 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:20:42,245 INFO L231 Difference]: Finished difference. Result has 51 places, 57 transitions, 190 flow [2023-08-04 08:20:42,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=51, PETRI_TRANSITIONS=57} [2023-08-04 08:20:42,245 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 08:20:42,246 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 57 transitions, 190 flow [2023-08-04 08:20:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:42,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:42,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:42,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:20:42,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:42,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash 842418028, now seen corresponding path program 1 times [2023-08-04 08:20:42,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:42,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004625588] [2023-08-04 08:20:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:20:42,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004625588] [2023-08-04 08:20:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004625588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65285364] [2023-08-04 08:20:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:42,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:42,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:42,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:42,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:42,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65285364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:42,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464233709] [2023-08-04 08:20:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:42,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:42,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:20:42,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:42,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:42,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:20:42,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:50,664 INFO L124 PetriNetUnfolderBase]: 21175/31704 cut-off events. [2023-08-04 08:20:50,664 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2023-08-04 08:20:50,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66223 conditions, 31704 events. 21175/31704 cut-off events. For 4098/4098 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 200025 event pairs, 14444 based on Foata normal form. 0/29216 useless extension candidates. Maximal degree in co-relation 66193. Up to 29819 conditions per place. [2023-08-04 08:20:50,769 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 08:20:50,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 312 flow [2023-08-04 08:20:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-04 08:20:50,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088207985143919 [2023-08-04 08:20:50,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-04 08:20:50,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-04 08:20:50,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:50,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-04 08:20:50,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:50,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:50,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:50,773 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 190 flow. Second operand 3 states and 548 transitions. [2023-08-04 08:20:50,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 312 flow [2023-08-04 08:20:50,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:50,776 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 200 flow [2023-08-04 08:20:50,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2023-08-04 08:20:50,777 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:20:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 200 flow [2023-08-04 08:20:50,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:50,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:50,782 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 08:20:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:50,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:50,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1967794715, now seen corresponding path program 1 times [2023-08-04 08:20:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974985632] [2023-08-04 08:20:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:51,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974985632] [2023-08-04 08:20:51,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974985632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:51,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206665080] [2023-08-04 08:20:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:51,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:51,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:20:51,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:20:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:51,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:51,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:20:51,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206665080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:51,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:51,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:20:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108146911] [2023-08-04 08:20:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:51,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:20:51,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:51,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:51,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:20:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:59,952 INFO L124 PetriNetUnfolderBase]: 21139/31950 cut-off events. [2023-08-04 08:20:59,953 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2023-08-04 08:21:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66522 conditions, 31950 events. 21139/31950 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 205115 event pairs, 14389 based on Foata normal form. 0/29546 useless extension candidates. Maximal degree in co-relation 29110. Up to 29443 conditions per place. [2023-08-04 08:21:00,120 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 08:21:00,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 332 flow [2023-08-04 08:21:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:21:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:21:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-04 08:21:00,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510677808727948 [2023-08-04 08:21:00,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-04 08:21:00,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-04 08:21:00,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:00,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-04 08:21:00,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:00,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:00,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:00,126 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 200 flow. Second operand 3 states and 550 transitions. [2023-08-04 08:21:00,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 332 flow [2023-08-04 08:21:00,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:00,131 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 210 flow [2023-08-04 08:21:00,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-04 08:21:00,132 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 08:21:00,132 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 210 flow [2023-08-04 08:21:00,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:00,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:00,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:00,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:00,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:21:00,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:00,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1334004479, now seen corresponding path program 1 times [2023-08-04 08:21:00,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406481214] [2023-08-04 08:21:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:00,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:21:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:00,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406481214] [2023-08-04 08:21:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406481214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:00,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119884849] [2023-08-04 08:21:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:00,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:00,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:00,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:21:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:00,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:21:00,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:21:00,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:21:00,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119884849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:21:00,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:21:00,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:21:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276590322] [2023-08-04 08:21:00,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:21:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:21:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:21:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:21:00,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:00,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:00,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:21:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:09,969 INFO L124 PetriNetUnfolderBase]: 20051/30582 cut-off events. [2023-08-04 08:21:09,970 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:21:10,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64379 conditions, 30582 events. 20051/30582 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 198171 event pairs, 14329 based on Foata normal form. 0/28586 useless extension candidates. Maximal degree in co-relation 30626. Up to 25511 conditions per place. [2023-08-04 08:21:10,112 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:21:10,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 387 flow [2023-08-04 08:21:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:21:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:21:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 08:21:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171773444753947 [2023-08-04 08:21:10,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 08:21:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 08:21:10,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:10,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 08:21:10,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:10,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:10,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:10,119 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 210 flow. Second operand 3 states and 557 transitions. [2023-08-04 08:21:10,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 387 flow [2023-08-04 08:21:10,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:10,125 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 220 flow [2023-08-04 08:21:10,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-04 08:21:10,125 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 08:21:10,125 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 220 flow [2023-08-04 08:21:10,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:10,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:10,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:10,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:21:10,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:10,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -391453186, now seen corresponding path program 1 times [2023-08-04 08:21:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:10,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091136934] [2023-08-04 08:21:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:10,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:21:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091136934] [2023-08-04 08:21:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091136934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845514017] [2023-08-04 08:21:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:10,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:10,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:21:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:10,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:21:10,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:21:10,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:21:10,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845514017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:21:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:21:10,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:21:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186926310] [2023-08-04 08:21:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:21:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:21:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:21:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:10,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:21:10,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:10,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:10,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:21:10,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:16,898 INFO L124 PetriNetUnfolderBase]: 19362/30057 cut-off events. [2023-08-04 08:21:16,898 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:21:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65877 conditions, 30057 events. 19362/30057 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 196646 event pairs, 13038 based on Foata normal form. 0/29110 useless extension candidates. Maximal degree in co-relation 33872. Up to 22127 conditions per place. [2023-08-04 08:21:17,000 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:21:17,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 399 flow [2023-08-04 08:21:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:21:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:21:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 08:21:17,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171773444753947 [2023-08-04 08:21:17,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 08:21:17,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 08:21:17,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:17,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 08:21:17,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:17,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:17,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:17,025 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 220 flow. Second operand 3 states and 557 transitions. [2023-08-04 08:21:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 399 flow [2023-08-04 08:21:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:17,044 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 230 flow [2023-08-04 08:21:17,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-04 08:21:17,045 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-04 08:21:17,045 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 230 flow [2023-08-04 08:21:17,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:17,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:17,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:17,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:21:17,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:17,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash -326448549, now seen corresponding path program 1 times [2023-08-04 08:21:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869661970] [2023-08-04 08:21:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:21:17,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869661970] [2023-08-04 08:21:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869661970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956601582] [2023-08-04 08:21:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:17,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:17,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:17,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:21:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:17,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:21:17,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:21:17,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:21:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956601582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:21:17,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:21:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:21:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704579635] [2023-08-04 08:21:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:21:17,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:21:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:21:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:17,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-04 08:21:17,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:17,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:17,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-04 08:21:17,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:25,342 INFO L124 PetriNetUnfolderBase]: 19153/29980 cut-off events. [2023-08-04 08:21:25,342 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:21:25,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67798 conditions, 29980 events. 19153/29980 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 195222 event pairs, 14429 based on Foata normal form. 0/29746 useless extension candidates. Maximal degree in co-relation 35842. Up to 24281 conditions per place. [2023-08-04 08:21:25,546 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 67 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 08:21:25,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 411 flow [2023-08-04 08:21:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:21:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:21:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 08:21:25,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171773444753947 [2023-08-04 08:21:25,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 08:21:25,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 08:21:25,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:25,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 08:21:25,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:25,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:25,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:25,551 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 230 flow. Second operand 3 states and 557 transitions. [2023-08-04 08:21:25,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 411 flow [2023-08-04 08:21:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:25,778 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 240 flow [2023-08-04 08:21:25,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-08-04 08:21:25,778 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 08:21:25,778 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 240 flow [2023-08-04 08:21:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:25,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:25,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:21:25,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:25,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash 127993551, now seen corresponding path program 1 times [2023-08-04 08:21:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:25,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428419423] [2023-08-04 08:21:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:25,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:21:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:26,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428419423] [2023-08-04 08:21:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428419423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569860371] [2023-08-04 08:21:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:26,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:26,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:26,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:21:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:26,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:26,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:21:26,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:21:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569860371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:26,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:21:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749498746] [2023-08-04 08:21:26,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:26,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:26,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:26,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:26,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:32,189 INFO L124 PetriNetUnfolderBase]: 17997/28142 cut-off events. [2023-08-04 08:21:32,190 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:21:32,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64441 conditions, 28142 events. 17997/28142 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 184309 event pairs, 10395 based on Foata normal form. 2/28143 useless extension candidates. Maximal degree in co-relation 48888. Up to 26179 conditions per place. [2023-08-04 08:21:32,315 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 57 selfloop transitions, 3 changer transitions 1/67 dead transitions. [2023-08-04 08:21:32,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 372 flow [2023-08-04 08:21:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2023-08-04 08:21:32,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937325905292479 [2023-08-04 08:21:32,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2023-08-04 08:21:32,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2023-08-04 08:21:32,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:32,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2023-08-04 08:21:32,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:32,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:32,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:32,321 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 240 flow. Second operand 4 states and 709 transitions. [2023-08-04 08:21:32,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 372 flow [2023-08-04 08:21:32,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:32,543 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 252 flow [2023-08-04 08:21:32,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-04 08:21:32,543 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-04 08:21:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 252 flow [2023-08-04 08:21:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:32,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:32,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:21:32,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:21:32,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:32,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1042491305, now seen corresponding path program 1 times [2023-08-04 08:21:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968649339] [2023-08-04 08:21:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:21:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968649339] [2023-08-04 08:21:32,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968649339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385521174] [2023-08-04 08:21:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:32,838 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:32,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:21:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:33,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:33,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:21:33,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:21:33,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385521174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:33,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:33,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:21:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605766357] [2023-08-04 08:21:33,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:33,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:33,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:33,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:33,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:33,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:33,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:33,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:39,696 INFO L124 PetriNetUnfolderBase]: 17145/26814 cut-off events. [2023-08-04 08:21:39,696 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:21:39,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61276 conditions, 26814 events. 17145/26814 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 175642 event pairs, 10068 based on Foata normal form. 8/26821 useless extension candidates. Maximal degree in co-relation 45955. Up to 24835 conditions per place. [2023-08-04 08:21:39,810 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 61 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-04 08:21:39,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 400 flow [2023-08-04 08:21:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 713 transitions. [2023-08-04 08:21:39,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49651810584958217 [2023-08-04 08:21:39,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 713 transitions. [2023-08-04 08:21:39,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 713 transitions. [2023-08-04 08:21:39,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:39,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 713 transitions. [2023-08-04 08:21:39,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:39,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:39,816 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:39,817 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 252 flow. Second operand 4 states and 713 transitions. [2023-08-04 08:21:39,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 400 flow [2023-08-04 08:21:40,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 390 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:21:40,040 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 256 flow [2023-08-04 08:21:40,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-04 08:21:40,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 08:21:40,040 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 256 flow [2023-08-04 08:21:40,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:40,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:40,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:40,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:21:40,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 08:21:40,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:40,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1403560491, now seen corresponding path program 1 times [2023-08-04 08:21:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:40,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565006563] [2023-08-04 08:21:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:40,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:21:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565006563] [2023-08-04 08:21:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565006563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877283349] [2023-08-04 08:21:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:40,345 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:40,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:21:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:40,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:40,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:21:40,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:21:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877283349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:40,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:40,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:21:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844487440] [2023-08-04 08:21:40,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:40,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:40,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:40,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:40,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:40,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:46,188 INFO L124 PetriNetUnfolderBase]: 16713/26142 cut-off events. [2023-08-04 08:21:46,188 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:21:46,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59088 conditions, 26142 events. 16713/26142 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 169686 event pairs, 9727 based on Foata normal form. 32/26173 useless extension candidates. Maximal degree in co-relation 43949. Up to 23507 conditions per place. [2023-08-04 08:21:46,324 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 65 selfloop transitions, 3 changer transitions 1/75 dead transitions. [2023-08-04 08:21:46,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 420 flow [2023-08-04 08:21:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-04 08:21:46,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49930362116991645 [2023-08-04 08:21:46,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-04 08:21:46,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-04 08:21:46,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:46,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-04 08:21:46,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:46,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:46,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:46,328 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 256 flow. Second operand 4 states and 717 transitions. [2023-08-04 08:21:46,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 420 flow [2023-08-04 08:21:46,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 410 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:21:46,462 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 260 flow [2023-08-04 08:21:46,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-04 08:21:46,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-04 08:21:46,462 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 260 flow [2023-08-04 08:21:46,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:46,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:46,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:46,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:46,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:46,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:46,669 INFO L85 PathProgramCache]: Analyzing trace with hash 189027458, now seen corresponding path program 1 times [2023-08-04 08:21:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:46,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525612433] [2023-08-04 08:21:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:46,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:21:46,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:46,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525612433] [2023-08-04 08:21:46,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525612433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:46,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314419878] [2023-08-04 08:21:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:46,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:46,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:21:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:47,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:47,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:21:47,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:21:47,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314419878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:47,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:47,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:21:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778977593] [2023-08-04 08:21:47,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:47,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:47,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:47,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:47,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:47,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:50,594 INFO L124 PetriNetUnfolderBase]: 10381/16522 cut-off events. [2023-08-04 08:21:50,595 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:21:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37205 conditions, 16522 events. 10381/16522 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 100009 event pairs, 5440 based on Foata normal form. 192/16713 useless extension candidates. Maximal degree in co-relation 32048. Up to 9564 conditions per place. [2023-08-04 08:21:50,672 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 08:21:50,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 82 transitions, 465 flow [2023-08-04 08:21:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-04 08:21:50,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041782729805014 [2023-08-04 08:21:50,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-04 08:21:50,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-04 08:21:50,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:50,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-04 08:21:50,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:50,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:50,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:50,705 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 260 flow. Second operand 4 states and 724 transitions. [2023-08-04 08:21:50,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 82 transitions, 465 flow [2023-08-04 08:21:50,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 454 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:21:50,810 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 270 flow [2023-08-04 08:21:50,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-08-04 08:21:50,811 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-04 08:21:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 270 flow [2023-08-04 08:21:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:50,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:50,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:50,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:51,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:51,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1550936228, now seen corresponding path program 1 times [2023-08-04 08:21:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102136878] [2023-08-04 08:21:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:21:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102136878] [2023-08-04 08:21:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102136878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205602091] [2023-08-04 08:21:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:51,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:51,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:51,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:51,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:21:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:51,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:51,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:21:51,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:21:51,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205602091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:51,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:21:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075917469] [2023-08-04 08:21:51,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:51,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:51,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:51,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:51,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 170.6) internal successors, (853), 5 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:51,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:51,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:54,564 INFO L124 PetriNetUnfolderBase]: 9421/14931 cut-off events. [2023-08-04 08:21:54,564 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:21:54,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35803 conditions, 14931 events. 9421/14931 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88107 event pairs, 5948 based on Foata normal form. 233/15163 useless extension candidates. Maximal degree in co-relation 34698. Up to 8751 conditions per place. [2023-08-04 08:21:54,643 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 73 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 08:21:54,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 476 flow [2023-08-04 08:21:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-04 08:21:54,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041782729805014 [2023-08-04 08:21:54,645 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-04 08:21:54,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-04 08:21:54,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:54,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-04 08:21:54,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:54,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:54,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:54,647 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 270 flow. Second operand 4 states and 724 transitions. [2023-08-04 08:21:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 476 flow [2023-08-04 08:21:54,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:54,715 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 286 flow [2023-08-04 08:21:54,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-04 08:21:54,715 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2023-08-04 08:21:54,715 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 286 flow [2023-08-04 08:21:54,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.6) internal successors, (853), 5 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:54,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:54,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:21:54,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:21:54,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:54,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:54,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1750532675, now seen corresponding path program 1 times [2023-08-04 08:21:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:54,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823193380] [2023-08-04 08:21:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:21:55,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823193380] [2023-08-04 08:21:55,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823193380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:21:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320104902] [2023-08-04 08:21:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:21:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:21:55,044 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:21:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:21:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:55,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:21:55,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:21:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:21:55,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:21:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:21:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320104902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:21:55,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:21:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:21:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169819345] [2023-08-04 08:21:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:21:55,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:21:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:21:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:21:55,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-04 08:21:55,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:55,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:55,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-04 08:21:55,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:22:00,050 INFO L124 PetriNetUnfolderBase]: 9409/14896 cut-off events. [2023-08-04 08:22:00,051 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:22:00,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37436 conditions, 14896 events. 9409/14896 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87856 event pairs, 8414 based on Foata normal form. 13/14908 useless extension candidates. Maximal degree in co-relation 36338. Up to 13454 conditions per place. [2023-08-04 08:22:00,108 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 72 selfloop transitions, 3 changer transitions 3/84 dead transitions. [2023-08-04 08:22:00,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 494 flow [2023-08-04 08:22:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:22:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:22:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-04 08:22:00,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041782729805014 [2023-08-04 08:22:00,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-04 08:22:00,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-04 08:22:00,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:22:00,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-04 08:22:00,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:00,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:00,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:00,113 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 286 flow. Second operand 4 states and 724 transitions. [2023-08-04 08:22:00,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 494 flow [2023-08-04 08:22:00,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 490 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:22:00,330 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 284 flow [2023-08-04 08:22:00,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2023-08-04 08:22:00,330 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2023-08-04 08:22:00,330 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 284 flow [2023-08-04 08:22:00,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:00,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:22:00,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:22:00,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:22:00,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:00,538 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:22:00,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:22:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1879655609, now seen corresponding path program 1 times [2023-08-04 08:22:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:22:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089910289] [2023-08-04 08:22:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:22:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:22:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:22:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089910289] [2023-08-04 08:22:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089910289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:22:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77543933] [2023-08-04 08:22:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:07,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:07,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:22:07,375 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:22:07,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:22:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:07,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 08:22:07,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:22:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:22:16,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:22:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:22:24,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77543933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:22:24,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:22:24,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-08-04 08:22:24,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597588743] [2023-08-04 08:22:24,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:22:24,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:22:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:22:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:22:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:22:24,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 359 [2023-08-04 08:22:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 284 flow. Second operand has 13 states, 13 states have (on average 147.6153846153846) internal successors, (1919), 13 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:22:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 359 [2023-08-04 08:22:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:22:32,543 INFO L124 PetriNetUnfolderBase]: 15094/24038 cut-off events. [2023-08-04 08:22:32,543 INFO L125 PetriNetUnfolderBase]: For 16411/16411 co-relation queries the response was YES. [2023-08-04 08:22:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60047 conditions, 24038 events. 15094/24038 cut-off events. For 16411/16411 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 163038 event pairs, 1425 based on Foata normal form. 2/23905 useless extension candidates. Maximal degree in co-relation 59934. Up to 6568 conditions per place. [2023-08-04 08:22:32,676 INFO L140 encePairwiseOnDemand]: 350/359 looper letters, 159 selfloop transitions, 14 changer transitions 93/272 dead transitions. [2023-08-04 08:22:32,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 272 transitions, 1817 flow [2023-08-04 08:22:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 08:22:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 08:22:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1790 transitions. [2023-08-04 08:22:32,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532793112180299 [2023-08-04 08:22:32,680 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1790 transitions. [2023-08-04 08:22:32,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1790 transitions. [2023-08-04 08:22:32,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:22:32,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1790 transitions. [2023-08-04 08:22:32,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.72727272727272) internal successors, (1790), 11 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:32,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 359.0) internal successors, (4308), 12 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:32,685 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 359.0) internal successors, (4308), 12 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:32,685 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 284 flow. Second operand 11 states and 1790 transitions. [2023-08-04 08:22:32,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 272 transitions, 1817 flow [2023-08-04 08:22:33,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 272 transitions, 1767 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 08:22:33,015 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 409 flow [2023-08-04 08:22:33,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-04 08:22:33,016 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2023-08-04 08:22:33,016 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 409 flow [2023-08-04 08:22:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 147.6153846153846) internal successors, (1919), 13 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:33,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:22:33,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:22:33,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:22:33,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:33,223 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:22:33,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:22:33,223 INFO L85 PathProgramCache]: Analyzing trace with hash -891506873, now seen corresponding path program 2 times [2023-08-04 08:22:33,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:22:33,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485220619] [2023-08-04 08:22:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:22:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:22:39,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:22:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485220619] [2023-08-04 08:22:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485220619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:22:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77623991] [2023-08-04 08:22:39,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:22:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:22:39,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:22:39,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:22:39,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:22:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:22:39,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 08:22:39,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:22:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:22:44,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:22:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:22:47,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77623991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:22:47,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:22:47,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-04 08:22:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000971956] [2023-08-04 08:22:47,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:22:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 08:22:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:22:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 08:22:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-04 08:22:48,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 359 [2023-08-04 08:22:48,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 145.66666666666666) internal successors, (2622), 18 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:48,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:22:48,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 359 [2023-08-04 08:22:48,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:22:55,856 INFO L124 PetriNetUnfolderBase]: 15274/25595 cut-off events. [2023-08-04 08:22:55,856 INFO L125 PetriNetUnfolderBase]: For 77198/77198 co-relation queries the response was YES. [2023-08-04 08:22:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97778 conditions, 25595 events. 15274/25595 cut-off events. For 77198/77198 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 189065 event pairs, 2448 based on Foata normal form. 1/25493 useless extension candidates. Maximal degree in co-relation 97740. Up to 10924 conditions per place. [2023-08-04 08:22:56,035 INFO L140 encePairwiseOnDemand]: 350/359 looper letters, 136 selfloop transitions, 10 changer transitions 74/226 dead transitions. [2023-08-04 08:22:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 226 transitions, 1679 flow [2023-08-04 08:22:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:22:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:22:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1463 transitions. [2023-08-04 08:22:56,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45280099040544725 [2023-08-04 08:22:56,040 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1463 transitions. [2023-08-04 08:22:56,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1463 transitions. [2023-08-04 08:22:56,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:22:56,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1463 transitions. [2023-08-04 08:22:56,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.55555555555554) internal successors, (1463), 9 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:56,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:56,069 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:56,069 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 409 flow. Second operand 9 states and 1463 transitions. [2023-08-04 08:22:56,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 226 transitions, 1679 flow [2023-08-04 08:22:56,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 1643 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-04 08:22:56,701 INFO L231 Difference]: Finished difference. Result has 99 places, 74 transitions, 438 flow [2023-08-04 08:22:56,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=438, PETRI_PLACES=99, PETRI_TRANSITIONS=74} [2023-08-04 08:22:56,701 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2023-08-04 08:22:56,701 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 74 transitions, 438 flow [2023-08-04 08:22:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.66666666666666) internal successors, (2622), 18 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:56,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:22:56,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:22:56,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:22:56,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:56,909 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:22:56,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:22:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1023932909, now seen corresponding path program 1 times [2023-08-04 08:22:56,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:22:56,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552086462] [2023-08-04 08:22:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:56,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:22:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:22:57,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:22:57,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552086462] [2023-08-04 08:22:57,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552086462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:22:57,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145580789] [2023-08-04 08:22:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:57,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:22:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:22:57,727 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:22:57,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:22:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:58,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 08:22:58,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:23:03,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:23:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145580789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:05,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:05,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 23 [2023-08-04 08:23:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009050376] [2023-08-04 08:23:05,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-04 08:23:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-04 08:23:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-08-04 08:23:06,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 359 [2023-08-04 08:23:06,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 74 transitions, 438 flow. Second operand has 23 states, 23 states have (on average 124.95652173913044) internal successors, (2874), 23 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:06,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:06,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 359 [2023-08-04 08:23:06,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:16,775 INFO L124 PetriNetUnfolderBase]: 17462/30154 cut-off events. [2023-08-04 08:23:16,775 INFO L125 PetriNetUnfolderBase]: For 110511/110511 co-relation queries the response was YES. [2023-08-04 08:23:16,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120889 conditions, 30154 events. 17462/30154 cut-off events. For 110511/110511 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 238902 event pairs, 2456 based on Foata normal form. 375/30435 useless extension candidates. Maximal degree in co-relation 120852. Up to 10577 conditions per place. [2023-08-04 08:23:17,026 INFO L140 encePairwiseOnDemand]: 338/359 looper letters, 220 selfloop transitions, 84 changer transitions 22/330 dead transitions. [2023-08-04 08:23:17,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 330 transitions, 2770 flow [2023-08-04 08:23:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-04 08:23:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-04 08:23:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3266 transitions. [2023-08-04 08:23:17,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.363899721448468 [2023-08-04 08:23:17,031 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3266 transitions. [2023-08-04 08:23:17,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3266 transitions. [2023-08-04 08:23:17,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:17,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3266 transitions. [2023-08-04 08:23:17,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 130.64) internal successors, (3266), 25 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:17,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 359.0) internal successors, (9334), 26 states have internal predecessors, (9334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:17,043 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 359.0) internal successors, (9334), 26 states have internal predecessors, (9334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:17,043 INFO L175 Difference]: Start difference. First operand has 99 places, 74 transitions, 438 flow. Second operand 25 states and 3266 transitions. [2023-08-04 08:23:17,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 330 transitions, 2770 flow [2023-08-04 08:23:17,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 330 transitions, 2600 flow, removed 66 selfloop flow, removed 6 redundant places. [2023-08-04 08:23:17,744 INFO L231 Difference]: Finished difference. Result has 126 places, 148 transitions, 1319 flow [2023-08-04 08:23:17,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1319, PETRI_PLACES=126, PETRI_TRANSITIONS=148} [2023-08-04 08:23:17,744 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2023-08-04 08:23:17,744 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 148 transitions, 1319 flow [2023-08-04 08:23:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 124.95652173913044) internal successors, (2874), 23 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:17,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:17,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-04 08:23:17,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 08:23:17,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:17,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1526641173, now seen corresponding path program 1 times [2023-08-04 08:23:17,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137354818] [2023-08-04 08:23:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:23:18,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137354818] [2023-08-04 08:23:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137354818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216839608] [2023-08-04 08:23:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:18,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:18,763 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:18,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:23:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:19,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 08:23:19,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 08:23:27,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:23:31,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216839608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:31,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:31,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 19 [2023-08-04 08:23:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794110154] [2023-08-04 08:23:31,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:31,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 08:23:31,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 08:23:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-08-04 08:23:32,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 359 [2023-08-04 08:23:32,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 1319 flow. Second operand has 19 states, 19 states have (on average 128.26315789473685) internal successors, (2437), 19 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:32,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:32,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 359 [2023-08-04 08:23:32,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:47,281 INFO L124 PetriNetUnfolderBase]: 18603/33328 cut-off events. [2023-08-04 08:23:47,281 INFO L125 PetriNetUnfolderBase]: For 252684/252684 co-relation queries the response was YES. [2023-08-04 08:23:47,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172872 conditions, 33328 events. 18603/33328 cut-off events. For 252684/252684 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 276103 event pairs, 2020 based on Foata normal form. 67/33332 useless extension candidates. Maximal degree in co-relation 172826. Up to 16580 conditions per place. [2023-08-04 08:23:47,469 INFO L140 encePairwiseOnDemand]: 340/359 looper letters, 157 selfloop transitions, 66 changer transitions 275/505 dead transitions. [2023-08-04 08:23:47,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 505 transitions, 5561 flow [2023-08-04 08:23:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-04 08:23:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-04 08:23:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5475 transitions. [2023-08-04 08:23:47,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36311181854357344 [2023-08-04 08:23:47,477 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5475 transitions. [2023-08-04 08:23:47,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5475 transitions. [2023-08-04 08:23:47,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:47,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5475 transitions. [2023-08-04 08:23:47,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 130.35714285714286) internal successors, (5475), 42 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 359.0) internal successors, (15437), 43 states have internal predecessors, (15437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,499 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 359.0) internal successors, (15437), 43 states have internal predecessors, (15437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,499 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 1319 flow. Second operand 42 states and 5475 transitions. [2023-08-04 08:23:47,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 505 transitions, 5561 flow [2023-08-04 08:23:50,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 505 transitions, 5371 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-08-04 08:23:50,249 INFO L231 Difference]: Finished difference. Result has 167 places, 138 transitions, 1279 flow [2023-08-04 08:23:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1279, PETRI_PLACES=167, PETRI_TRANSITIONS=138} [2023-08-04 08:23:50,249 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2023-08-04 08:23:50,249 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 138 transitions, 1279 flow [2023-08-04 08:23:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 128.26315789473685) internal successors, (2437), 19 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:50,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:50,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:50,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 08:23:50,457 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:50,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash -265938715, now seen corresponding path program 1 times [2023-08-04 08:23:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505457945] [2023-08-04 08:23:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:23:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505457945] [2023-08-04 08:23:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505457945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583744793] [2023-08-04 08:23:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:51,370 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:51,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:23:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:51,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 08:23:51,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:23:55,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:23:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583744793] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:57,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 08:23:57,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 7] total 25 [2023-08-04 08:23:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10600401] [2023-08-04 08:23:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 08:23:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 08:23:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-08-04 08:23:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 359 [2023-08-04 08:23:57,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 138 transitions, 1279 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:57,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 359 [2023-08-04 08:23:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:02,228 INFO L124 PetriNetUnfolderBase]: 7827/14955 cut-off events. [2023-08-04 08:24:02,228 INFO L125 PetriNetUnfolderBase]: For 187543/187563 co-relation queries the response was YES. [2023-08-04 08:24:02,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89231 conditions, 14955 events. 7827/14955 cut-off events. For 187543/187563 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 121752 event pairs, 1022 based on Foata normal form. 10/14866 useless extension candidates. Maximal degree in co-relation 89182. Up to 6844 conditions per place. [2023-08-04 08:24:02,348 INFO L140 encePairwiseOnDemand]: 350/359 looper letters, 126 selfloop transitions, 46 changer transitions 8/196 dead transitions. [2023-08-04 08:24:02,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 2076 flow [2023-08-04 08:24:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:24:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:24:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1099 transitions. [2023-08-04 08:24:02,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373259052924791 [2023-08-04 08:24:02,349 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1099 transitions. [2023-08-04 08:24:02,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1099 transitions. [2023-08-04 08:24:02,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:02,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1099 transitions. [2023-08-04 08:24:02,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,352 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,352 INFO L175 Difference]: Start difference. First operand has 167 places, 138 transitions, 1279 flow. Second operand 7 states and 1099 transitions. [2023-08-04 08:24:02,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 2076 flow [2023-08-04 08:24:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 1860 flow, removed 94 selfloop flow, removed 16 redundant places. [2023-08-04 08:24:04,072 INFO L231 Difference]: Finished difference. Result has 132 places, 137 transitions, 1280 flow [2023-08-04 08:24:04,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1280, PETRI_PLACES=132, PETRI_TRANSITIONS=137} [2023-08-04 08:24:04,073 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 81 predicate places. [2023-08-04 08:24:04,073 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 137 transitions, 1280 flow [2023-08-04 08:24:04,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:04,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:04,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:04,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:04,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 08:24:04,281 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:04,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1767119689, now seen corresponding path program 1 times [2023-08-04 08:24:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:04,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103811964] [2023-08-04 08:24:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:24:05,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:05,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103811964] [2023-08-04 08:24:05,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103811964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:05,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4519575] [2023-08-04 08:24:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:05,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:05,267 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:05,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:24:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:05,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-04 08:24:05,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:24:09,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4519575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:09,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:09,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 19 [2023-08-04 08:24:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273303250] [2023-08-04 08:24:09,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 08:24:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:09,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 08:24:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-04 08:24:09,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 359 [2023-08-04 08:24:09,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 137 transitions, 1280 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:09,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 359 [2023-08-04 08:24:09,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:14,933 INFO L124 PetriNetUnfolderBase]: 7823/14876 cut-off events. [2023-08-04 08:24:14,933 INFO L125 PetriNetUnfolderBase]: For 168970/168995 co-relation queries the response was YES. [2023-08-04 08:24:14,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88473 conditions, 14876 events. 7823/14876 cut-off events. For 168970/168995 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 121123 event pairs, 854 based on Foata normal form. 14/14791 useless extension candidates. Maximal degree in co-relation 88434. Up to 6378 conditions per place. [2023-08-04 08:24:14,986 INFO L140 encePairwiseOnDemand]: 350/359 looper letters, 89 selfloop transitions, 20 changer transitions 97/220 dead transitions. [2023-08-04 08:24:14,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 220 transitions, 2175 flow [2023-08-04 08:24:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:24:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:24:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1270 transitions. [2023-08-04 08:24:14,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-08-04 08:24:14,988 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1270 transitions. [2023-08-04 08:24:14,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1270 transitions. [2023-08-04 08:24:14,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:14,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1270 transitions. [2023-08-04 08:24:14,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,990 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,990 INFO L175 Difference]: Start difference. First operand has 132 places, 137 transitions, 1280 flow. Second operand 8 states and 1270 transitions. [2023-08-04 08:24:14,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 220 transitions, 2175 flow [2023-08-04 08:24:15,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 220 transitions, 2077 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-04 08:24:15,876 INFO L231 Difference]: Finished difference. Result has 134 places, 105 transitions, 814 flow [2023-08-04 08:24:15,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=814, PETRI_PLACES=134, PETRI_TRANSITIONS=105} [2023-08-04 08:24:15,877 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2023-08-04 08:24:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 105 transitions, 814 flow [2023-08-04 08:24:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:15,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:15,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:15,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:16,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:16,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash 159528391, now seen corresponding path program 1 times [2023-08-04 08:24:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:16,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192944473] [2023-08-04 08:24:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:24:17,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:17,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192944473] [2023-08-04 08:24:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192944473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:17,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384111943] [2023-08-04 08:24:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:17,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:17,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:17,207 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:17,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:24:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:17,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 08:24:17,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:24:24,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:24:27,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384111943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:27,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:27,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 25 [2023-08-04 08:24:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147474932] [2023-08-04 08:24:27,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:27,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 08:24:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 08:24:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-08-04 08:24:29,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 359 [2023-08-04 08:24:29,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 105 transitions, 814 flow. Second operand has 25 states, 25 states have (on average 123.92) internal successors, (3098), 25 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:29,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:29,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 359 [2023-08-04 08:24:29,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:34,313 INFO L124 PetriNetUnfolderBase]: 2295/4851 cut-off events. [2023-08-04 08:24:34,313 INFO L125 PetriNetUnfolderBase]: For 38831/38831 co-relation queries the response was YES. [2023-08-04 08:24:34,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25592 conditions, 4851 events. 2295/4851 cut-off events. For 38831/38831 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 34348 event pairs, 499 based on Foata normal form. 27/4878 useless extension candidates. Maximal degree in co-relation 25556. Up to 3611 conditions per place. [2023-08-04 08:24:34,333 INFO L140 encePairwiseOnDemand]: 339/359 looper letters, 0 selfloop transitions, 0 changer transitions 174/174 dead transitions. [2023-08-04 08:24:34,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 174 transitions, 1666 flow [2023-08-04 08:24:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 08:24:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 08:24:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3001 transitions. [2023-08-04 08:24:34,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34830547818012997 [2023-08-04 08:24:34,336 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3001 transitions. [2023-08-04 08:24:34,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3001 transitions. [2023-08-04 08:24:34,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:34,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3001 transitions. [2023-08-04 08:24:34,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 125.04166666666667) internal successors, (3001), 24 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:34,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:34,343 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:34,344 INFO L175 Difference]: Start difference. First operand has 134 places, 105 transitions, 814 flow. Second operand 24 states and 3001 transitions. [2023-08-04 08:24:34,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 174 transitions, 1666 flow [2023-08-04 08:24:34,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 174 transitions, 1540 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-08-04 08:24:34,466 INFO L231 Difference]: Finished difference. Result has 140 places, 0 transitions, 0 flow [2023-08-04 08:24:34,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=140, PETRI_TRANSITIONS=0} [2023-08-04 08:24:34,467 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2023-08-04 08:24:34,467 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 0 transitions, 0 flow [2023-08-04 08:24:34,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 123.92) internal successors, (3098), 25 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:34,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:24:34,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-04 08:24:34,674 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:34,674 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:24:34,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 207 transitions, 504 flow [2023-08-04 08:24:34,925 INFO L124 PetriNetUnfolderBase]: 898/4360 cut-off events. [2023-08-04 08:24:34,925 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:24:34,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 4360 events. 898/4360 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35087 event pairs, 11 based on Foata normal form. 0/3706 useless extension candidates. Maximal degree in co-relation 2512. Up to 192 conditions per place. [2023-08-04 08:24:34,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 207 transitions, 504 flow [2023-08-04 08:24:34,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 136 transitions, 308 flow [2023-08-04 08:24:34,940 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:24:34,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 08:24:34,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 08:24:34,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 136 transitions, 308 flow [2023-08-04 08:24:34,972 INFO L124 PetriNetUnfolderBase]: 12/515 cut-off events. [2023-08-04 08:24:34,972 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 08:24:34,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 515 events. 12/515 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2057 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 435. Up to 27 conditions per place. [2023-08-04 08:24:34,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-04 08:24:46,336 INFO L134 LiptonReduction]: Checked pairs total: 1429 [2023-08-04 08:24:46,337 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 08:24:46,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:24:46,338 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;@7f73b791, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:24:46,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:24:46,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:24:46,345 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2023-08-04 08:24:46,345 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 08:24:46,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:46,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:46,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:46,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 131006578, now seen corresponding path program 1 times [2023-08-04 08:24:46,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:46,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84439947] [2023-08-04 08:24:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:24:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84439947] [2023-08-04 08:24:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84439947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:46,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:24:46,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:24:46,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987513832] [2023-08-04 08:24:46,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:46,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:46,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:24:46,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 321 [2023-08-04 08:24:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 321 [2023-08-04 08:24:46,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:47,210 INFO L124 PetriNetUnfolderBase]: 1323/2188 cut-off events. [2023-08-04 08:24:47,210 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-08-04 08:24:47,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 2188 events. 1323/2188 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10889 event pairs, 982 based on Foata normal form. 0/2139 useless extension candidates. Maximal degree in co-relation 2029. Up to 2006 conditions per place. [2023-08-04 08:24:47,219 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 08:24:47,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 140 flow [2023-08-04 08:24:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 08:24:47,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358255451713395 [2023-08-04 08:24:47,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 08:24:47,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 08:24:47,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:47,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 08:24:47,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:47,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:47,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:47,223 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 88 flow. Second operand 3 states and 516 transitions. [2023-08-04 08:24:47,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 140 flow [2023-08-04 08:24:47,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 29 transitions, 134 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 08:24:47,224 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 94 flow [2023-08-04 08:24:47,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-04 08:24:47,224 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:24:47,224 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 94 flow [2023-08-04 08:24:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:47,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:47,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:24:47,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-04 08:24:47,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:47,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 383990145, now seen corresponding path program 1 times [2023-08-04 08:24:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688628734] [2023-08-04 08:24:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:24:47,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:47,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688628734] [2023-08-04 08:24:47,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688628734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:47,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819210980] [2023-08-04 08:24:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:47,256 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:47,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:24:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:47,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:24:47,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:24:47,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819210980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:47,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:47,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:24:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349738027] [2023-08-04 08:24:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:24:47,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 321 [2023-08-04 08:24:47,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 321 [2023-08-04 08:24:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:48,448 INFO L124 PetriNetUnfolderBase]: 1319/2178 cut-off events. [2023-08-04 08:24:48,449 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:24:48,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 2178 events. 1319/2178 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10827 event pairs, 756 based on Foata normal form. 4/2139 useless extension candidates. Maximal degree in co-relation 2658. Up to 1985 conditions per place. [2023-08-04 08:24:48,458 INFO L140 encePairwiseOnDemand]: 317/321 looper letters, 22 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-04 08:24:48,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 154 flow [2023-08-04 08:24:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:24:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:24:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-08-04 08:24:48,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246105919003116 [2023-08-04 08:24:48,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-08-04 08:24:48,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-08-04 08:24:48,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:48,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-08-04 08:24:48,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:48,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:48,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:48,463 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 94 flow. Second operand 5 states and 842 transitions. [2023-08-04 08:24:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 154 flow [2023-08-04 08:24:48,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:48,464 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 108 flow [2023-08-04 08:24:48,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 08:24:48,465 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 08:24:48,465 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 108 flow [2023-08-04 08:24:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:48,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:48,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:48,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1992452693, now seen corresponding path program 1 times [2023-08-04 08:24:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:48,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024088496] [2023-08-04 08:24:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:24:48,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:48,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024088496] [2023-08-04 08:24:48,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024088496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:48,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281667943] [2023-08-04 08:24:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:48,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:48,698 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:48,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:24:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:49,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:49,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:24:49,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:49,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281667943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:49,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:49,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:49,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355118018] [2023-08-04 08:24:49,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:49,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:49,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 321 [2023-08-04 08:24:49,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:49,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:49,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 321 [2023-08-04 08:24:49,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:49,652 INFO L124 PetriNetUnfolderBase]: 1212/2017 cut-off events. [2023-08-04 08:24:49,652 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-04 08:24:49,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4307 conditions, 2017 events. 1212/2017 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9800 event pairs, 910 based on Foata normal form. 0/1980 useless extension candidates. Maximal degree in co-relation 1896. Up to 1773 conditions per place. [2023-08-04 08:24:49,657 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 08:24:49,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 172 flow [2023-08-04 08:24:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 08:24:49,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379023883696781 [2023-08-04 08:24:49,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 08:24:49,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 08:24:49,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:49,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 08:24:49,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:49,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:49,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:49,660 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 108 flow. Second operand 3 states and 518 transitions. [2023-08-04 08:24:49,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 172 flow [2023-08-04 08:24:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 165 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:49,661 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 116 flow [2023-08-04 08:24:49,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 08:24:49,661 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-04 08:24:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 116 flow [2023-08-04 08:24:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:49,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:49,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:49,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-04 08:24:49,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-04 08:24:49,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:49,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1819873659, now seen corresponding path program 1 times [2023-08-04 08:24:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800015910] [2023-08-04 08:24:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:49,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800015910] [2023-08-04 08:24:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800015910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265974924] [2023-08-04 08:24:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:49,910 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:49,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-04 08:24:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:50,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:50,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:50,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265974924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:50,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:24:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619880434] [2023-08-04 08:24:50,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:50,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:50,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 321 [2023-08-04 08:24:50,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 321 [2023-08-04 08:24:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:50,699 INFO L124 PetriNetUnfolderBase]: 876/1419 cut-off events. [2023-08-04 08:24:50,699 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-04 08:24:50,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3087 conditions, 1419 events. 876/1419 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6177 event pairs, 476 based on Foata normal form. 2/1412 useless extension candidates. Maximal degree in co-relation 1717. Up to 1269 conditions per place. [2023-08-04 08:24:50,704 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:24:50,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2023-08-04 08:24:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 678 transitions. [2023-08-04 08:24:50,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280373831775701 [2023-08-04 08:24:50,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 678 transitions. [2023-08-04 08:24:50,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 678 transitions. [2023-08-04 08:24:50,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:50,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 678 transitions. [2023-08-04 08:24:50,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:50,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:50,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:50,708 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 116 flow. Second operand 4 states and 678 transitions. [2023-08-04 08:24:50,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2023-08-04 08:24:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 31 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:24:50,709 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 111 flow [2023-08-04 08:24:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-08-04 08:24:50,709 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:24:50,709 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 111 flow [2023-08-04 08:24:50,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:50,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:50,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:50,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:50,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:50,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:50,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash -780267843, now seen corresponding path program 1 times [2023-08-04 08:24:50,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474495945] [2023-08-04 08:24:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:24:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474495945] [2023-08-04 08:24:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474495945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011820910] [2023-08-04 08:24:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:50,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:50,944 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-04 08:24:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:51,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:24:51,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:24:51,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:51,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011820910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:51,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:51,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:24:51,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732892467] [2023-08-04 08:24:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:24:51,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 321 [2023-08-04 08:24:51,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:51,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:51,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 321 [2023-08-04 08:24:51,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:51,702 INFO L124 PetriNetUnfolderBase]: 844/1371 cut-off events. [2023-08-04 08:24:51,702 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-04 08:24:51,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2982 conditions, 1371 events. 844/1371 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5886 event pairs, 176 based on Foata normal form. 16/1386 useless extension candidates. Maximal degree in co-relation 1655. Up to 1100 conditions per place. [2023-08-04 08:24:51,707 INFO L140 encePairwiseOnDemand]: 317/321 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-04 08:24:51,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 197 flow [2023-08-04 08:24:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:24:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:24:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 848 transitions. [2023-08-04 08:24:51,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283489096573208 [2023-08-04 08:24:51,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 848 transitions. [2023-08-04 08:24:51,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 848 transitions. [2023-08-04 08:24:51,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:51,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 848 transitions. [2023-08-04 08:24:51,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:51,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:51,710 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:51,710 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 111 flow. Second operand 5 states and 848 transitions. [2023-08-04 08:24:51,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 197 flow [2023-08-04 08:24:51,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:24:51,711 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 121 flow [2023-08-04 08:24:51,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2023-08-04 08:24:51,712 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-04 08:24:51,712 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 121 flow [2023-08-04 08:24:51,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:51,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:51,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:51,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:51,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:51,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1566403664, now seen corresponding path program 1 times [2023-08-04 08:24:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:51,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344616242] [2023-08-04 08:24:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:24:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344616242] [2023-08-04 08:24:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344616242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405988117] [2023-08-04 08:24:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:51,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:51,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:51,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-04 08:24:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:52,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:52,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:24:52,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:24:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405988117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:52,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:52,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029388414] [2023-08-04 08:24:52,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 321 [2023-08-04 08:24:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 321 [2023-08-04 08:24:52,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:52,818 INFO L124 PetriNetUnfolderBase]: 632/1015 cut-off events. [2023-08-04 08:24:52,818 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:24:52,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1015 events. 632/1015 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3911 event pairs, 344 based on Foata normal form. 8/1022 useless extension candidates. Maximal degree in co-relation 1257. Up to 809 conditions per place. [2023-08-04 08:24:52,823 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 27 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-04 08:24:52,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 191 flow [2023-08-04 08:24:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 682 transitions. [2023-08-04 08:24:52,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311526479750779 [2023-08-04 08:24:52,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 682 transitions. [2023-08-04 08:24:52,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 682 transitions. [2023-08-04 08:24:52,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:52,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 682 transitions. [2023-08-04 08:24:52,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:52,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:52,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:52,827 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 121 flow. Second operand 4 states and 682 transitions. [2023-08-04 08:24:52,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 191 flow [2023-08-04 08:24:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:52,828 INFO L231 Difference]: Finished difference. Result has 50 places, 26 transitions, 114 flow [2023-08-04 08:24:52,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=26} [2023-08-04 08:24:52,829 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-08-04 08:24:52,829 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 26 transitions, 114 flow [2023-08-04 08:24:52,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:52,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:52,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:52,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:53,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:53,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:53,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2106419830, now seen corresponding path program 1 times [2023-08-04 08:24:53,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:53,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132762988] [2023-08-04 08:24:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:24:53,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132762988] [2023-08-04 08:24:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132762988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553813680] [2023-08-04 08:24:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:53,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:53,091 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:53,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-04 08:24:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:53,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:24:53,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:24:53,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:53,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553813680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:53,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:53,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:24:53,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143648579] [2023-08-04 08:24:53,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:53,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:24:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:24:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:53,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 321 [2023-08-04 08:24:53,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 26 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:53,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:53,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 321 [2023-08-04 08:24:53,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:53,712 INFO L124 PetriNetUnfolderBase]: 440/727 cut-off events. [2023-08-04 08:24:53,712 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:24:53,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 727 events. 440/727 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2564 event pairs, 104 based on Foata normal form. 64/790 useless extension candidates. Maximal degree in co-relation 1131. Up to 336 conditions per place. [2023-08-04 08:24:53,714 INFO L140 encePairwiseOnDemand]: 319/321 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 08:24:53,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 190 flow [2023-08-04 08:24:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-04 08:24:53,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342679127725857 [2023-08-04 08:24:53,715 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-04 08:24:53,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-04 08:24:53,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:53,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-04 08:24:53,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:53,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:53,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:53,717 INFO L175 Difference]: Start difference. First operand has 50 places, 26 transitions, 114 flow. Second operand 4 states and 686 transitions. [2023-08-04 08:24:53,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 190 flow [2023-08-04 08:24:53,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:24:53,718 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-04 08:24:53,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-04 08:24:53,718 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:24:53,718 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-04 08:24:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:53,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:24:53,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:24:53,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:24:53,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:53,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-04 08:24:53,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:53,924 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:24:53,924 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:24:53,925 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:24:53,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:24:53 BasicIcfg [2023-08-04 08:24:53,930 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:24:53,930 INFO L158 Benchmark]: Toolchain (without parser) took 296036.23ms. Allocated memory was 562.0MB in the beginning and 6.9GB in the end (delta: 6.4GB). Free memory was 521.8MB in the beginning and 4.0GB in the end (delta: -3.5GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-08-04 08:24:53,930 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 408.9MB. Free memory was 357.2MB in the beginning and 357.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:24:53,930 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.38ms. Allocated memory is still 562.0MB. Free memory was 521.6MB in the beginning and 509.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:24:53,930 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.70ms. Allocated memory is still 562.0MB. Free memory was 509.3MB in the beginning and 506.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 08:24:53,930 INFO L158 Benchmark]: Boogie Preprocessor took 28.02ms. Allocated memory is still 562.0MB. Free memory was 506.0MB in the beginning and 503.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:24:53,931 INFO L158 Benchmark]: RCFGBuilder took 1022.17ms. Allocated memory is still 562.0MB. Free memory was 503.5MB in the beginning and 442.5MB in the end (delta: 61.0MB). Peak memory consumption was 64.4MB. Max. memory is 16.0GB. [2023-08-04 08:24:53,931 INFO L158 Benchmark]: TraceAbstraction took 294787.75ms. Allocated memory was 562.0MB in the beginning and 6.9GB in the end (delta: 6.4GB). Free memory was 441.4MB in the beginning and 4.0GB in the end (delta: -3.6GB). Peak memory consumption was 2.8GB. Max. memory is 16.0GB. [2023-08-04 08:24:53,932 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 408.9MB. Free memory was 357.2MB in the beginning and 357.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 162.38ms. Allocated memory is still 562.0MB. Free memory was 521.6MB in the beginning and 509.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.70ms. Allocated memory is still 562.0MB. Free memory was 509.3MB in the beginning and 506.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.02ms. Allocated memory is still 562.0MB. Free memory was 506.0MB in the beginning and 503.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 1022.17ms. Allocated memory is still 562.0MB. Free memory was 503.5MB in the beginning and 442.5MB in the end (delta: 61.0MB). Peak memory consumption was 64.4MB. Max. memory is 16.0GB. * TraceAbstraction took 294787.75ms. Allocated memory was 562.0MB in the beginning and 6.9GB in the end (delta: 6.4GB). Free memory was 441.4MB in the beginning and 4.0GB in the end (delta: -3.6GB). Peak memory consumption was 2.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.7s, 163 PlacesBefore, 36 PlacesAfterwards, 173 TransitionsBefore, 39 TransitionsAfterwards, 1332 CoEnabledTransitionPairs, 8 FixpointIterations, 75 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 7 ChoiceCompositions, 149 TotalNumberOfCompositions, 4711 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3992, independent: 3907, independent conditional: 0, independent unconditional: 3907, dependent: 85, dependent conditional: 0, dependent unconditional: 85, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 835, independent: 823, independent conditional: 0, independent unconditional: 823, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3992, independent: 3084, independent conditional: 0, independent unconditional: 3084, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 835, unknown conditional: 0, unknown unconditional: 835] , Statistics on independence cache: Total cache size (in pairs): 74, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.6s, 129 PlacesBefore, 24 PlacesAfterwards, 124 TransitionsBefore, 17 TransitionsAfterwards, 486 CoEnabledTransitionPairs, 7 FixpointIterations, 75 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 111 TotalNumberOfCompositions, 343 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 343, independent: 343, independent conditional: 0, independent unconditional: 343, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 233, independent: 233, independent conditional: 0, independent unconditional: 233, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 343, independent: 110, independent conditional: 0, independent unconditional: 110, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 233, unknown conditional: 0, unknown unconditional: 233] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13.4s, 181 PlacesBefore, 51 PlacesAfterwards, 194 TransitionsBefore, 57 TransitionsAfterwards, 3204 CoEnabledTransitionPairs, 8 FixpointIterations, 75 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 7 ChoiceCompositions, 152 TotalNumberOfCompositions, 14512 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10301, independent: 10147, independent conditional: 0, independent unconditional: 10147, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1893, independent: 1872, independent conditional: 0, independent unconditional: 1872, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10301, independent: 8275, independent conditional: 0, independent unconditional: 8275, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 1893, unknown conditional: 0, unknown unconditional: 1893] , Statistics on independence cache: Total cache size (in pairs): 199, Positive cache size: 193, Positive conditional cache size: 0, Positive unconditional cache size: 193, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.4s, 147 PlacesBefore, 39 PlacesAfterwards, 136 TransitionsBefore, 26 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 7 FixpointIterations, 75 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 114 TotalNumberOfCompositions, 1429 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1209, independent: 1198, independent conditional: 0, independent unconditional: 1198, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 659, independent: 653, independent conditional: 0, independent unconditional: 653, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1209, independent: 545, independent conditional: 0, independent unconditional: 545, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 659, unknown conditional: 0, unknown unconditional: 659] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 101]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 182 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.1s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 66 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 512 IncrementalHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 23 mSDtfsCounter, 512 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 358 SizeOfPredicates, 0 NumberOfNonLiveVariables, 981 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 194 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 254.4s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 149.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5076 SdHoareTripleChecker+Valid, 14.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4711 mSDsluCounter, 11038 SdHoareTripleChecker+Invalid, 12.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10563 mSDsCounter, 243 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15524 IncrementalHoareTripleChecker+Invalid, 15767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 243 mSolverCounterUnsat, 475 mSDtfsCounter, 15524 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1695 GetRequests, 1418 SyntacticMatches, 15 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 18.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1319occurred in iteration=15, InterpolantAutomatonStates: 168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 80.2s InterpolantComputationTime, 1628 NumberOfCodeBlocks, 1628 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2224 ConstructedInterpolants, 0 QuantifiedInterpolants, 52938 SizeOfPredicates, 335 NumberOfNonLiveVariables, 4350 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 49 InterpolantComputations, 8 PerfectInterpolantSequences, 880/1014 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 182 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 37 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 194 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 11.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 195 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 139 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 451 IncrementalHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 17 mSDtfsCounter, 451 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 931 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 138/158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:24:53,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...