/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_safe000_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:25:41,036 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:25:41,106 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:25:41,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:25:41,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:25:41,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:25:41,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:25:41,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:25:41,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:25:41,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:25:41,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:25:41,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:25:41,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:25:41,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:25:41,144 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:25:41,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:25:41,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:25:41,150 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:25:41,150 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:25:41,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:25:41,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:25:41,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:25:41,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:25:41,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:25:41,153 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:25:41,154 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:25:41,154 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:25:41,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:25:41,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:25:41,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:25:41,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:25:41,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:25:41,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:25:41,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:25:41,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:25:41,157 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:25:41,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:25:41,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:25:41,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:25:41,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:25:41,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:25:41,389 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:25:41,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_power.opt_bound2.i [2023-08-04 06:25:42,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:25:42,721 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:25:42,722 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_power.opt_bound2.i [2023-08-04 06:25:42,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95431c77e/98b6bfa4b88340fe8b66d9b37b1efd5e/FLAG1f27687db [2023-08-04 06:25:42,756 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95431c77e/98b6bfa4b88340fe8b66d9b37b1efd5e [2023-08-04 06:25:42,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:25:42,763 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:25:42,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:25:42,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:25:42,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:25:42,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:25:42" (1/1) ... [2023-08-04 06:25:42,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745b9fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:42, skipping insertion in model container [2023-08-04 06:25:42,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:25:42" (1/1) ... [2023-08-04 06:25:42,825 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:25:42,986 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_safe000_power.opt_bound2.i[951,964] [2023-08-04 06:25:43,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:25:43,196 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:25:43,205 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_safe000_power.opt_bound2.i[951,964] [2023-08-04 06:25:43,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:25:43,214 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:25:43,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:25:43,280 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:25:43,281 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:25:43,287 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:25:43,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43 WrapperNode [2023-08-04 06:25:43,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:25:43,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:25:43,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:25:43,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:25:43,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,329 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 205 [2023-08-04 06:25:43,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:25:43,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:25:43,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:25:43,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:25:43,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:25:43,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:25:43,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:25:43,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:25:43,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (1/1) ... [2023-08-04 06:25:43,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:25:43,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:43,417 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 06:25:43,444 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 06:25:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:25:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:25:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:25:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:25:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:25:43,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:25:43,459 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:25:43,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:25:43,459 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:25:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:25:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:25:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:25:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:25:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:25:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:25:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:25:43,462 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 06:25:43,628 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:25:43,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:25:44,027 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:25:44,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:25:44,307 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:25:44,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:25:44 BoogieIcfgContainer [2023-08-04 06:25:44,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:25:44,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:25:44,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:25:44,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:25:44,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:25:42" (1/3) ... [2023-08-04 06:25:44,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafc520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:25:44, skipping insertion in model container [2023-08-04 06:25:44,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:25:43" (2/3) ... [2023-08-04 06:25:44,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafc520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:25:44, skipping insertion in model container [2023-08-04 06:25:44,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:25:44" (3/3) ... [2023-08-04 06:25:44,317 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe000_power.opt_bound2.i [2023-08-04 06:25:44,324 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:25:44,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:25:44,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:25:44,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:25:44,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:25:44,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,601 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:25:44,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:44,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1952 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:25:44,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:25:44,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:44,696 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:25:44,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:44,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1952 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:25:44,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-08-04 06:25:51,443 INFO L134 LiptonReduction]: Checked pairs total: 8313 [2023-08-04 06:25:51,444 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-04 06:25:51,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:25:51,461 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;@99b1c4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:25:51,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:25:51,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:25:51,464 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 06:25:51,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:51,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:51,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:25:51,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:51,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 873899571, now seen corresponding path program 1 times [2023-08-04 06:25:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141081488] [2023-08-04 06:25:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:51,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:51,816 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 06:25:51,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141081488] [2023-08-04 06:25:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141081488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:25:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:25:51,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989248775] [2023-08-04 06:25:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:25:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:25:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:25:51,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 274 [2023-08-04 06:25:51,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:51,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:51,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 274 [2023-08-04 06:25:51,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:52,716 INFO L124 PetriNetUnfolderBase]: 2492/4010 cut-off events. [2023-08-04 06:25:52,717 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 06:25:52,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8024 conditions, 4010 events. 2492/4010 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 23605 event pairs, 1010 based on Foata normal form. 150/3659 useless extension candidates. Maximal degree in co-relation 6974. Up to 2194 conditions per place. [2023-08-04 06:25:52,733 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 43 selfloop transitions, 2 changer transitions 8/55 dead transitions. [2023-08-04 06:25:52,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 231 flow [2023-08-04 06:25:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:25:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:25:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 06:25:52,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389294403892944 [2023-08-04 06:25:52,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 06:25:52,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 06:25:52,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:52,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 06:25:52,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:52,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:52,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:52,759 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 85 flow. Second operand 3 states and 443 transitions. [2023-08-04 06:25:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 231 flow [2023-08-04 06:25:52,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:25:52,763 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 69 flow [2023-08-04 06:25:52,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=69, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 06:25:52,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 06:25:52,767 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 69 flow [2023-08-04 06:25:52,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:52,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:52,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:25:52,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:52,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1790132989, now seen corresponding path program 1 times [2023-08-04 06:25:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:52,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814912803] [2023-08-04 06:25:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:52,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:52,818 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 06:25:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814912803] [2023-08-04 06:25:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814912803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:25:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:25:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804307777] [2023-08-04 06:25:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:25:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:25:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:25:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:25:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:25:52,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:53,314 INFO L124 PetriNetUnfolderBase]: 1734/2776 cut-off events. [2023-08-04 06:25:53,314 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-08-04 06:25:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2776 events. 1734/2776 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14474 event pairs, 990 based on Foata normal form. 0/2596 useless extension candidates. Maximal degree in co-relation 5688. Up to 2665 conditions per place. [2023-08-04 06:25:53,327 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 28 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 06:25:53,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 143 flow [2023-08-04 06:25:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:25:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:25:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-04 06:25:53,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024330900243309 [2023-08-04 06:25:53,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-04 06:25:53,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-04 06:25:53,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:53,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-04 06:25:53,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:53,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:53,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:53,334 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 69 flow. Second operand 3 states and 413 transitions. [2023-08-04 06:25:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 143 flow [2023-08-04 06:25:53,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:25:53,336 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 73 flow [2023-08-04 06:25:53,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-04 06:25:53,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-04 06:25:53,337 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 73 flow [2023-08-04 06:25:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:53,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:53,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:53,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 06:25:53,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:53,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1451345360, now seen corresponding path program 1 times [2023-08-04 06:25:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:53,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300416326] [2023-08-04 06:25:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:53,392 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 06:25:53,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:53,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300416326] [2023-08-04 06:25:53,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300416326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:53,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060395884] [2023-08-04 06:25:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:53,396 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 06:25:53,411 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 06:25:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:53,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:25:53,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:53,568 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 06:25:53,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:25:53,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060395884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:53,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:25:53,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:25:53,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526903022] [2023-08-04 06:25:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:53,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:25:53,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:25:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:53,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:25:53,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:53,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:53,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:25:53,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:54,065 INFO L124 PetriNetUnfolderBase]: 1508/2380 cut-off events. [2023-08-04 06:25:54,066 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 06:25:54,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4730 conditions, 2380 events. 1508/2380 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11836 event pairs, 944 based on Foata normal form. 0/2240 useless extension candidates. Maximal degree in co-relation 4714. Up to 2222 conditions per place. [2023-08-04 06:25:54,077 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 31 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-04 06:25:54,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 157 flow [2023-08-04 06:25:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:25:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:25:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-04 06:25:54,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060827250608273 [2023-08-04 06:25:54,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-04 06:25:54,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-04 06:25:54,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:54,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-04 06:25:54,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,084 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 73 flow. Second operand 3 states and 416 transitions. [2023-08-04 06:25:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 157 flow [2023-08-04 06:25:54,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:25:54,086 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 77 flow [2023-08-04 06:25:54,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-04 06:25:54,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-04 06:25:54,087 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 77 flow [2023-08-04 06:25:54,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:54,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:54,100 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 06:25:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:54,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:54,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1809079324, now seen corresponding path program 1 times [2023-08-04 06:25:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:54,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78351629] [2023-08-04 06:25:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:54,405 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 06:25:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78351629] [2023-08-04 06:25:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78351629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244656926] [2023-08-04 06:25:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:54,409 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 06:25:54,412 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 06:25:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:54,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:25:54,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:54,538 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 06:25:54,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:25:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244656926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:54,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:25:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:25:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936561148] [2023-08-04 06:25:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:25:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:25:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:54,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:25:54,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:54,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:25:54,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:54,922 INFO L124 PetriNetUnfolderBase]: 1384/2106 cut-off events. [2023-08-04 06:25:54,922 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-04 06:25:54,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4312 conditions, 2106 events. 1384/2106 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10040 event pairs, 838 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 4296. Up to 1766 conditions per place. [2023-08-04 06:25:54,953 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 34 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-08-04 06:25:54,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 173 flow [2023-08-04 06:25:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:25:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:25:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-04 06:25:54,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097323600973236 [2023-08-04 06:25:54,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-04 06:25:54,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-04 06:25:54,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:54,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-04 06:25:54,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,959 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 77 flow. Second operand 3 states and 419 transitions. [2023-08-04 06:25:54,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 173 flow [2023-08-04 06:25:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 169 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:25:54,960 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 81 flow [2023-08-04 06:25:54,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 06:25:54,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-04 06:25:54,961 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 81 flow [2023-08-04 06:25:54,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:54,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:54,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:54,971 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 06:25:55,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 06:25:55,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:55,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -419943, now seen corresponding path program 1 times [2023-08-04 06:25:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129219343] [2023-08-04 06:25:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:55,231 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 06:25:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129219343] [2023-08-04 06:25:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129219343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597728691] [2023-08-04 06:25:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:55,234 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 06:25:55,236 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 06:25:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:55,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:25:55,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:55,391 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 06:25:55,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:25:55,408 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 06:25:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597728691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:25:55,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:25:55,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:25:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675855669] [2023-08-04 06:25:55,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:25:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:25:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:25:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:55,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 274 [2023-08-04 06:25:55,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:55,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 274 [2023-08-04 06:25:55,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:55,450 INFO L124 PetriNetUnfolderBase]: 8/25 cut-off events. [2023-08-04 06:25:55,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 25 events. 8/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 57. Up to 18 conditions per place. [2023-08-04 06:25:55,451 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 06:25:55,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 13 transitions, 57 flow [2023-08-04 06:25:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:25:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:25:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:25:55,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726277372262774 [2023-08-04 06:25:55,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:25:55,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:25:55,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:55,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:25:55,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 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 06:25:55,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,457 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 81 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:25:55,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 13 transitions, 57 flow [2023-08-04 06:25:55,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 55 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:25:55,458 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 06:25:55,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 06:25:55,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -22 predicate places. [2023-08-04 06:25:55,460 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 06:25:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:25:55,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:25:55,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:25:55,472 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 06:25:55,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:55,670 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 06:25:55,671 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:25:55,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:55,724 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:25:55,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:55,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1952 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:25:55,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:25:55,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 119 transitions, 253 flow [2023-08-04 06:25:55,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:25:55,727 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:25:55,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:25:55,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 119 transitions, 253 flow [2023-08-04 06:25:55,747 INFO L124 PetriNetUnfolderBase]: 6/235 cut-off events. [2023-08-04 06:25:55,748 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:25:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 235 events. 6/235 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 631 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2023-08-04 06:25:55,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 1452 [2023-08-04 06:26:00,823 INFO L134 LiptonReduction]: Checked pairs total: 4630 [2023-08-04 06:26:00,823 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 06:26:00,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:26:00,825 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;@99b1c4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:26:00,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:26:00,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:26:00,830 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 06:26:00,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:26:00,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:26:00,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:26:00,830 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 06:26:00,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:26:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash -98802129, now seen corresponding path program 1 times [2023-08-04 06:26:00,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:26:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779337301] [2023-08-04 06:26:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:26:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:26:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:26:00,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:26:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:26:00,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:26:00,884 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:26:00,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:26:00,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:26:00,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:26:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:26:00,885 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:26:00,886 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:26:00,887 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:26:00,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:26:00,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:26:00,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,071 INFO L124 PetriNetUnfolderBase]: 93/1396 cut-off events. [2023-08-04 06:26:01,073 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:26:01,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1396 events. 93/1396 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9424 event pairs, 0 based on Foata normal form. 0/1235 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 06:26:01,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,083 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:26:01,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:26:01,216 INFO L124 PetriNetUnfolderBase]: 93/1396 cut-off events. [2023-08-04 06:26:01,217 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:26:01,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1396 events. 93/1396 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9424 event pairs, 0 based on Foata normal form. 0/1235 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 06:26:01,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 6560 [2023-08-04 06:26:08,308 INFO L134 LiptonReduction]: Checked pairs total: 23720 [2023-08-04 06:26:08,308 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-04 06:26:08,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:26:08,310 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;@99b1c4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:26:08,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:26:08,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:26:08,314 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 06:26:08,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:26:08,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:26:08,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:26:08,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:26:08,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:26:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1283078360, now seen corresponding path program 1 times [2023-08-04 06:26:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:26:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930736741] [2023-08-04 06:26:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:26:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:26:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:26:08,433 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 06:26:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:26:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930736741] [2023-08-04 06:26:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930736741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:26:08,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:26:08,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:26:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6210148] [2023-08-04 06:26:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:26:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:26:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:26:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:26:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:26:08,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 307 [2023-08-04 06:26:08,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:08,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:26:08,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 307 [2023-08-04 06:26:08,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:27:53,613 INFO L124 PetriNetUnfolderBase]: 584082/739039 cut-off events. [2023-08-04 06:27:53,614 INFO L125 PetriNetUnfolderBase]: For 10848/10848 co-relation queries the response was YES. [2023-08-04 06:27:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483782 conditions, 739039 events. 584082/739039 cut-off events. For 10848/10848 co-relation queries the response was YES. Maximal size of possible extension queue 16610. Compared 4918453 event pairs, 129702 based on Foata normal form. 16317/680321 useless extension candidates. Maximal degree in co-relation 1064107. Up to 614901 conditions per place. [2023-08-04 06:27:57,952 INFO L140 encePairwiseOnDemand]: 301/307 looper letters, 75 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-04 06:27:57,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 389 flow [2023-08-04 06:27:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:27:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:27:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-04 06:27:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5646036916395223 [2023-08-04 06:27:57,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-04 06:27:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-04 06:27:57,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:27:57,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-04 06:27:57,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:27:57,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:27:57,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:27:57,960 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 144 flow. Second operand 3 states and 520 transitions. [2023-08-04 06:27:57,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 389 flow [2023-08-04 06:27:57,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 383 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 06:27:57,975 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 157 flow [2023-08-04 06:27:57,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-08-04 06:27:57,976 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-04 06:27:57,976 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 157 flow [2023-08-04 06:27:57,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:27:57,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:27:57,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:27:57,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:27:57,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:27:57,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:27:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash 855477839, now seen corresponding path program 1 times [2023-08-04 06:27:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:27:57,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744270614] [2023-08-04 06:27:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:27:57,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:27:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:27:58,011 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 06:27:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:27:58,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744270614] [2023-08-04 06:27:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744270614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:27:58,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:27:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:27:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160691416] [2023-08-04 06:27:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:27:58,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:27:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:27:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:27:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:27:58,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 307 [2023-08-04 06:27:58,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:27:58,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:27:58,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 307 [2023-08-04 06:27:58,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand