/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:07:17,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:07:17,807 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:07:17,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:07:17,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:07:17,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:07:17,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:07:17,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:07:17,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:07:17,832 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:07:17,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:07:17,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:07:17,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:07:17,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:07:17,833 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:07:17,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:07:17,834 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:07:17,834 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:07:17,835 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:07:17,835 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:07:17,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:07:17,836 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:07:17,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:07:17,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:07:17,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:07:17,837 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:07:17,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:07:17,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:07:17,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:07:17,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:07:17,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:07:17,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:07:17,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:07:17,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:07:17,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:07:17,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:07:17,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:07:17,841 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:07:17,841 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:07:17,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:07:17,841 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:07:17,842 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:07:18,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:07:18,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:07:18,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:07:18,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:07:18,127 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:07:18,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_power.oepc_bound2.i [2023-08-04 07:07:19,300 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:07:19,576 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:07:19,577 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_power.oepc_bound2.i [2023-08-04 07:07:19,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce8c88e7/cdabdc621af34823aa3f94297b971540/FLAGa93c8a71d [2023-08-04 07:07:19,602 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce8c88e7/cdabdc621af34823aa3f94297b971540 [2023-08-04 07:07:19,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:07:19,606 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:07:19,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:07:19,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:07:19,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:07:19,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:07:19" (1/1) ... [2023-08-04 07:07:19,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248ab3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:19, skipping insertion in model container [2023-08-04 07:07:19,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:07:19" (1/1) ... [2023-08-04 07:07:19,658 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:07:19,784 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_power.oepc_bound2.i[995,1008] [2023-08-04 07:07:19,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:07:19,992 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:07:20,004 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_power.oepc_bound2.i[995,1008] [2023-08-04 07:07:20,021 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:07:20,023 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:07:20,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:07:20,115 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:07:20,115 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:07:20,121 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:07:20,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20 WrapperNode [2023-08-04 07:07:20,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:07:20,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:07:20,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:07:20,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:07:20,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,185 INFO L138 Inliner]: procedures = 177, calls = 87, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 217 [2023-08-04 07:07:20,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:07:20,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:07:20,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:07:20,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:07:20,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:07:20,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:07:20,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:07:20,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:07:20,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (1/1) ... [2023-08-04 07:07:20,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:07:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:20,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:07:20,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:07:20,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:07:20,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:07:20,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:07:20,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:07:20,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:07:20,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:07:20,311 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:07:20,311 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:07:20,311 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:07:20,312 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:07:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:07:20,312 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:07:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:07:20,312 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:07:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:07:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:07:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:07:20,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:07:20,314 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:07:20,469 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:07:20,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:07:20,946 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:07:21,221 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:07:21,221 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:07:21,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:07:21 BoogieIcfgContainer [2023-08-04 07:07:21,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:07:21,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:07:21,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:07:21,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:07:21,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:07:19" (1/3) ... [2023-08-04 07:07:21,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145df724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:07:21, skipping insertion in model container [2023-08-04 07:07:21,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:07:20" (2/3) ... [2023-08-04 07:07:21,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145df724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:07:21, skipping insertion in model container [2023-08-04 07:07:21,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:07:21" (3/3) ... [2023-08-04 07:07:21,234 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe019_power.oepc_bound2.i [2023-08-04 07:07:21,242 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:07:21,250 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:07:21,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:07:21,250 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:07:21,325 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:07:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:07:21,619 INFO L124 PetriNetUnfolderBase]: 62/929 cut-off events. [2023-08-04 07:07:21,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:21,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 929 events. 62/929 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5582 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 566. Up to 32 conditions per place. [2023-08-04 07:07:21,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:07:21,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 153 transitions, 318 flow [2023-08-04 07:07:21,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:07:21,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:07:21,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:07:21,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 153 transitions, 318 flow [2023-08-04 07:07:21,724 INFO L124 PetriNetUnfolderBase]: 46/690 cut-off events. [2023-08-04 07:07:21,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:21,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 690 events. 46/690 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3679 event pairs, 0 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 440. Up to 32 conditions per place. [2023-08-04 07:07:21,734 INFO L119 LiptonReduction]: Number of co-enabled transitions 2658 [2023-08-04 07:07:29,190 INFO L134 LiptonReduction]: Checked pairs total: 6116 [2023-08-04 07:07:29,191 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-04 07:07:29,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:07:29,211 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;@14402d10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:07:29,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:07:29,221 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:07:29,221 INFO L124 PetriNetUnfolderBase]: 4/59 cut-off events. [2023-08-04 07:07:29,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:29,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:29,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:07:29,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:29,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2024404979, now seen corresponding path program 1 times [2023-08-04 07:07:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490487702] [2023-08-04 07:07:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:07:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:29,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490487702] [2023-08-04 07:07:29,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490487702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:29,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:29,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:07:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309284845] [2023-08-04 07:07:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:07:29,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 299 [2023-08-04 07:07:29,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:29,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:29,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 299 [2023-08-04 07:07:29,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:31,219 INFO L124 PetriNetUnfolderBase]: 5700/8262 cut-off events. [2023-08-04 07:07:31,220 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-04 07:07:31,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16672 conditions, 8262 events. 5700/8262 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 46087 event pairs, 4850 based on Foata normal form. 300/7875 useless extension candidates. Maximal degree in co-relation 16658. Up to 8248 conditions per place. [2023-08-04 07:07:31,272 INFO L140 encePairwiseOnDemand]: 295/299 looper letters, 30 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2023-08-04 07:07:31,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 152 flow [2023-08-04 07:07:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:07:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:07:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:07:31,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451505016722408 [2023-08-04 07:07:31,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:07:31,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:07:31,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:31,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:07:31,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:31,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:31,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:31,309 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 80 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:07:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 152 flow [2023-08-04 07:07:31,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:07:31,314 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 84 flow [2023-08-04 07:07:31,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-04 07:07:31,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-04 07:07:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 84 flow [2023-08-04 07:07:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:31,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:07:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:07:31,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:31,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1590919662, now seen corresponding path program 1 times [2023-08-04 07:07:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819799746] [2023-08-04 07:07:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:07:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819799746] [2023-08-04 07:07:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819799746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317879030] [2023-08-04 07:07:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:31,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:31,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:07:31,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:07:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:31,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:07:31,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:07:31,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:07:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317879030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:31,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:07:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:07:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684615182] [2023-08-04 07:07:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:31,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 299 [2023-08-04 07:07:31,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:31,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:31,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 299 [2023-08-04 07:07:31,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:32,742 INFO L124 PetriNetUnfolderBase]: 4028/5738 cut-off events. [2023-08-04 07:07:32,743 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 07:07:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11600 conditions, 5738 events. 4028/5738 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29010 event pairs, 2902 based on Foata normal form. 0/5449 useless extension candidates. Maximal degree in co-relation 11583. Up to 5704 conditions per place. [2023-08-04 07:07:32,772 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 32 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-08-04 07:07:32,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 164 flow [2023-08-04 07:07:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:07:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:07:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:07:32,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451505016722408 [2023-08-04 07:07:32,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:07:32,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:07:32,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:32,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:07:32,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:32,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:32,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:32,779 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 84 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:07:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 164 flow [2023-08-04 07:07:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:07:32,780 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 88 flow [2023-08-04 07:07:32,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-04 07:07:32,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-04 07:07:32,781 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 88 flow [2023-08-04 07:07:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:32,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:32,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:07:32,791 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 07:07:32,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:32,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:32,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1018145613, now seen corresponding path program 1 times [2023-08-04 07:07:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:32,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280353169] [2023-08-04 07:07:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:07:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280353169] [2023-08-04 07:07:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280353169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638427812] [2023-08-04 07:07:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:33,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:07:33,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:07:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:33,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:07:33,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:33,236 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 07:07:33,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:07:33,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638427812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:33,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:07:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:07:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891419438] [2023-08-04 07:07:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:33,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:33,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 299 [2023-08-04 07:07:33,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:33,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:33,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 299 [2023-08-04 07:07:33,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:34,065 INFO L124 PetriNetUnfolderBase]: 3458/4862 cut-off events. [2023-08-04 07:07:34,065 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 07:07:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9857 conditions, 4862 events. 3458/4862 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23673 event pairs, 2414 based on Foata normal form. 0/4645 useless extension candidates. Maximal degree in co-relation 9840. Up to 4727 conditions per place. [2023-08-04 07:07:34,085 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 35 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 07:07:34,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 180 flow [2023-08-04 07:07:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:07:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:07:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-04 07:07:34,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484949832775919 [2023-08-04 07:07:34,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-04 07:07:34,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-04 07:07:34,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:34,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-04 07:07:34,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,091 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 88 flow. Second operand 3 states and 492 transitions. [2023-08-04 07:07:34,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 180 flow [2023-08-04 07:07:34,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:07:34,093 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 92 flow [2023-08-04 07:07:34,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-04 07:07:34,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-04 07:07:34,094 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 92 flow [2023-08-04 07:07:34,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:34,095 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 07:07:34,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:07:34,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:07:34,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:34,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash 716802452, now seen corresponding path program 1 times [2023-08-04 07:07:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095647511] [2023-08-04 07:07:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:34,401 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 07:07:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095647511] [2023-08-04 07:07:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095647511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931607201] [2023-08-04 07:07:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:34,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:07:34,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:07:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:34,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:07:34,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:34,546 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 07:07:34,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:07:34,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931607201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:34,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:07:34,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:07:34,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609303381] [2023-08-04 07:07:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:34,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:34,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:34,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 299 [2023-08-04 07:07:34,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:34,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 299 [2023-08-04 07:07:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:35,284 INFO L124 PetriNetUnfolderBase]: 3158/4436 cut-off events. [2023-08-04 07:07:35,290 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 07:07:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9093 conditions, 4436 events. 3158/4436 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20710 event pairs, 2060 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 9075. Up to 3743 conditions per place. [2023-08-04 07:07:35,315 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 38 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 07:07:35,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 196 flow [2023-08-04 07:07:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:07:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:07:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 07:07:35,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518394648829431 [2023-08-04 07:07:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 07:07:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 07:07:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:35,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 07:07:35,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 07:07:35,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,322 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-04 07:07:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 196 flow [2023-08-04 07:07:35,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:07:35,326 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 96 flow [2023-08-04 07:07:35,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-04 07:07:35,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-08-04 07:07:35,327 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 96 flow [2023-08-04 07:07:35,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:35,328 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 07:07:35,335 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 07:07:35,533 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 07:07:35,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:35,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2133011936, now seen corresponding path program 1 times [2023-08-04 07:07:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:35,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525938818] [2023-08-04 07:07:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:35,605 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 07:07:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525938818] [2023-08-04 07:07:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525938818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779344283] [2023-08-04 07:07:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:35,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:07:35,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:07:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:35,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:07:35,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:35,772 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 07:07:35,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:07:35,789 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 07:07:35,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779344283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:07:35,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:07:35,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:07:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964560103] [2023-08-04 07:07:35,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:07:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:07:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:07:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:35,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:07:35,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:07:35,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:35,831 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:07:35,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:35,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:07:35,832 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:07:35,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:07:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 07:07:35,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100334448160535 [2023-08-04 07:07:35,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 07:07:35,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 07:07:35,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:35,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 07:07:35,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,839 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 96 flow. Second operand 4 states and 610 transitions. [2023-08-04 07:07:35,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:07:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:07:35,840 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:07:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 07:07:35,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -22 predicate places. [2023-08-04 07:07:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:07:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:35,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:07:35,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:07:36,049 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 07:07:36,049 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:07:36,051 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:07:36,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:07:36,140 INFO L124 PetriNetUnfolderBase]: 62/929 cut-off events. [2023-08-04 07:07:36,141 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:36,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 929 events. 62/929 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5582 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 566. Up to 32 conditions per place. [2023-08-04 07:07:36,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:07:36,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 140 transitions, 300 flow [2023-08-04 07:07:36,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:07:36,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:07:36,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:07:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 140 transitions, 300 flow [2023-08-04 07:07:36,178 INFO L124 PetriNetUnfolderBase]: 14/433 cut-off events. [2023-08-04 07:07:36,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:36,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 433 events. 14/433 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1849 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 318. Up to 16 conditions per place. [2023-08-04 07:07:36,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-04 07:07:42,472 INFO L134 LiptonReduction]: Checked pairs total: 4898 [2023-08-04 07:07:42,472 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 07:07:42,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:07:42,474 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;@14402d10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:07:42,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:07:42,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:07:42,479 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:07:42,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:07:42,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:42,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:07:42,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:07:42,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2137740012, now seen corresponding path program 1 times [2023-08-04 07:07:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808142280] [2023-08-04 07:07:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:07:42,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:07:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:07:42,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:07:42,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:07:42,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:07:42,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:07:42,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:07:42,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:07:42,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:07:42,542 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:07:42,544 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:07:42,545 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:07:42,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:07:42,589 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:07:42,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 199 transitions, 446 flow [2023-08-04 07:07:43,098 INFO L124 PetriNetUnfolderBase]: 282/4219 cut-off events. [2023-08-04 07:07:43,098 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:07:43,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4508 conditions, 4219 events. 282/4219 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40319 event pairs, 0 based on Foata normal form. 0/3736 useless extension candidates. Maximal degree in co-relation 3068. Up to 162 conditions per place. [2023-08-04 07:07:43,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 199 transitions, 446 flow [2023-08-04 07:07:43,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 181 transitions, 394 flow [2023-08-04 07:07:43,118 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:07:43,118 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 181 transitions, 394 flow [2023-08-04 07:07:43,119 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 181 transitions, 394 flow [2023-08-04 07:07:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 181 transitions, 394 flow [2023-08-04 07:07:43,419 INFO L124 PetriNetUnfolderBase]: 201/3045 cut-off events. [2023-08-04 07:07:43,419 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:07:43,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 3045 events. 201/3045 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 26832 event pairs, 0 based on Foata normal form. 0/2724 useless extension candidates. Maximal degree in co-relation 2273. Up to 162 conditions per place. [2023-08-04 07:07:43,467 INFO L119 LiptonReduction]: Number of co-enabled transitions 6656 [2023-08-04 07:07:52,660 INFO L134 LiptonReduction]: Checked pairs total: 16894 [2023-08-04 07:07:52,660 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-04 07:07:52,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:07:52,662 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;@14402d10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:07:52,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:07:52,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:07:52,667 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2023-08-04 07:07:52,667 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:07:52,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:52,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:07:52,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:52,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash 289896921, now seen corresponding path program 1 times [2023-08-04 07:07:52,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:52,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585711517] [2023-08-04 07:07:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:07:52,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:52,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585711517] [2023-08-04 07:07:52,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585711517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:52,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:52,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:07:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645281807] [2023-08-04 07:07:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:07:52,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 335 [2023-08-04 07:07:52,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:52,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:52,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 335 [2023-08-04 07:07:52,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand