/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:15:29,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:15:29,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:15:29,667 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:15:29,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:15:29,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:15:29,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:15:29,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:15:29,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:15:29,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:15:29,702 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:15:29,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:15:29,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:15:29,704 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:15:29,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:15:29,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:15:29,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:15:29,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:15:29,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:15:29,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:15:29,705 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:15:29,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:15:29,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:15:29,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:15:29,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:15:29,707 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:15:29,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:15:29,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:15:29,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:15:29,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:15:29,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:15:29,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:15:29,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:15:29,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:15:29,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:15:29,710 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:15:30,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:15:30,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:15:30,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:15:30,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:15:30,041 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:15:30,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 12:15:31,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:15:31,372 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:15:31,372 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 12:15:31,386 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16d81162f/49f5686821544ad99f34dc6dfc4a07ae/FLAG6db210e10 [2023-08-26 12:15:31,397 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16d81162f/49f5686821544ad99f34dc6dfc4a07ae [2023-08-26 12:15:31,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:15:31,400 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:15:31,401 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:15:31,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:15:31,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:15:31,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a23d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31, skipping insertion in model container [2023-08-26 12:15:31,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,449 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:15:31,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:15:31,783 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:15:31,809 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:15:31,811 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:15:31,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:15:31,867 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:15:31,867 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:15:31,873 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:15:31,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31 WrapperNode [2023-08-26 12:15:31,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:15:31,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:15:31,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:15:31,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:15:31,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,931 INFO L138 Inliner]: procedures = 177, calls = 63, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-08-26 12:15:31,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:15:31,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:15:31,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:15:31,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:15:31,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,972 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:15:31,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:15:31,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:15:31,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:15:31,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (1/1) ... [2023-08-26 12:15:31,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:15:31,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:15:32,007 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) [2023-08-26 12:15:32,037 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 [2023-08-26 12:15:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:15:32,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:15:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:15:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:15:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:15:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:15:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 12:15:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 12:15:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:15:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:15:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:15:32,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:15:32,054 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:15:32,201 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:15:32,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:15:32,364 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:15:32,370 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:15:32,370 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:15:32,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:15:32 BoogieIcfgContainer [2023-08-26 12:15:32,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:15:32,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:15:32,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:15:32,376 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:15:32,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:15:31" (1/3) ... [2023-08-26 12:15:32,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5b018c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:15:32, skipping insertion in model container [2023-08-26 12:15:32,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:15:31" (2/3) ... [2023-08-26 12:15:32,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5b018c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:15:32, skipping insertion in model container [2023-08-26 12:15:32,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:15:32" (3/3) ... [2023-08-26 12:15:32,378 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 12:15:32,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:15:32,393 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 12:15:32,393 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:15:32,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:15:32,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 111 transitions, 242 flow [2023-08-26 12:15:32,532 INFO L124 PetriNetUnfolderBase]: 3/107 cut-off events. [2023-08-26 12:15:32,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:15:32,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 3/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 12:15:32,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 111 transitions, 242 flow [2023-08-26 12:15:32,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 91 transitions, 194 flow [2023-08-26 12:15:32,543 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:15:32,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 91 transitions, 194 flow [2023-08-26 12:15:32,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 91 transitions, 194 flow [2023-08-26 12:15:32,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 91 transitions, 194 flow [2023-08-26 12:15:32,572 INFO L124 PetriNetUnfolderBase]: 1/91 cut-off events. [2023-08-26 12:15:32,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:15:32,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 1/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-08-26 12:15:32,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 1766 [2023-08-26 12:15:35,200 INFO L134 LiptonReduction]: Checked pairs total: 2807 [2023-08-26 12:15:35,201 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 12:15:35,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:15:35,223 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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;@78197eff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:15:35,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-26 12:15:35,224 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:15:35,224 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:15:35,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:15:35,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:35,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:15:35,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:35,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 381, now seen corresponding path program 1 times [2023-08-26 12:15:35,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:35,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941661292] [2023-08-26 12:15:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:35,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:35,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:35,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941661292] [2023-08-26 12:15:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941661292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:35,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:15:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978631153] [2023-08-26 12:15:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:35,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:15:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:15:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:15:35,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2023-08-26 12:15:35,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:35,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2023-08-26 12:15:35,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:35,483 INFO L124 PetriNetUnfolderBase]: 704/1037 cut-off events. [2023-08-26 12:15:35,483 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 12:15:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 1037 events. 704/1037 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4333 event pairs, 704 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 2137. Up to 1027 conditions per place. [2023-08-26 12:15:35,492 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 18 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-26 12:15:35,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 88 flow [2023-08-26 12:15:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:15:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:15:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 232 transitions. [2023-08-26 12:15:35,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2023-08-26 12:15:35,504 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 232 transitions. [2023-08-26 12:15:35,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 232 transitions. [2023-08-26 12:15:35,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:35,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 232 transitions. [2023-08-26 12:15:35,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,513 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,514 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 68 flow. Second operand 2 states and 232 transitions. [2023-08-26 12:15:35,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 88 flow [2023-08-26 12:15:35,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:15:35,519 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 48 flow [2023-08-26 12:15:35,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=48, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 12:15:35,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -11 predicate places. [2023-08-26 12:15:35,523 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 48 flow [2023-08-26 12:15:35,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:35,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:35,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:15:35,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:35,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1792526947, now seen corresponding path program 1 times [2023-08-26 12:15:35,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:35,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095551800] [2023-08-26 12:15:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:35,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:35,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095551800] [2023-08-26 12:15:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095551800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744428389] [2023-08-26 12:15:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:35,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 12:15:35,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:35,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:35,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 12:15:35,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:36,173 INFO L124 PetriNetUnfolderBase]: 1747/2539 cut-off events. [2023-08-26 12:15:36,173 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:15:36,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 2539 events. 1747/2539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11298 event pairs, 696 based on Foata normal form. 75/2614 useless extension candidates. Maximal degree in co-relation 5244. Up to 1811 conditions per place. [2023-08-26 12:15:36,190 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 30 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-08-26 12:15:36,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 158 flow [2023-08-26 12:15:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-26 12:15:36,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138211382113821 [2023-08-26 12:15:36,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-26 12:15:36,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-26 12:15:36,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:36,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-26 12:15:36,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,202 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 48 flow. Second operand 3 states and 316 transitions. [2023-08-26 12:15:36,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 158 flow [2023-08-26 12:15:36,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:15:36,206 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 84 flow [2023-08-26 12:15:36,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-26 12:15:36,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 12:15:36,208 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 84 flow [2023-08-26 12:15:36,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:36,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:15:36,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:36,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -266240936, now seen corresponding path program 1 times [2023-08-26 12:15:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049312180] [2023-08-26 12:15:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049312180] [2023-08-26 12:15:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049312180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:36,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944773610] [2023-08-26 12:15:36,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:36,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 205 [2023-08-26 12:15:36,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:36,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 205 [2023-08-26 12:15:36,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:36,582 INFO L124 PetriNetUnfolderBase]: 1463/2167 cut-off events. [2023-08-26 12:15:36,582 INFO L125 PetriNetUnfolderBase]: For 568/568 co-relation queries the response was YES. [2023-08-26 12:15:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 2167 events. 1463/2167 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9965 event pairs, 429 based on Foata normal form. 18/2100 useless extension candidates. Maximal degree in co-relation 5340. Up to 1800 conditions per place. [2023-08-26 12:15:36,596 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-26 12:15:36,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 193 flow [2023-08-26 12:15:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-26 12:15:36,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2023-08-26 12:15:36,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-26 12:15:36,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-26 12:15:36,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:36,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-26 12:15:36,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,602 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 84 flow. Second operand 3 states and 324 transitions. [2023-08-26 12:15:36,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 193 flow [2023-08-26 12:15:36,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:36,610 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2023-08-26 12:15:36,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-26 12:15:36,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-26 12:15:36,612 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2023-08-26 12:15:36,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:36,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:36,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:15:36,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:36,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -266241680, now seen corresponding path program 1 times [2023-08-26 12:15:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:36,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837535992] [2023-08-26 12:15:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:36,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837535992] [2023-08-26 12:15:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837535992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:36,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:36,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823805695] [2023-08-26 12:15:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:36,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:36,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 12:15:36,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:36,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 12:15:36,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:36,956 INFO L124 PetriNetUnfolderBase]: 1560/2283 cut-off events. [2023-08-26 12:15:36,956 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2023-08-26 12:15:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5998 conditions, 2283 events. 1560/2283 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9899 event pairs, 210 based on Foata normal form. 24/2307 useless extension candidates. Maximal degree in co-relation 5992. Up to 1314 conditions per place. [2023-08-26 12:15:36,969 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-26 12:15:36,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 255 flow [2023-08-26 12:15:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-08-26 12:15:36,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2023-08-26 12:15:36,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-08-26 12:15:36,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-08-26 12:15:36,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:36,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-08-26 12:15:36,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,975 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 4 states and 414 transitions. [2023-08-26 12:15:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 255 flow [2023-08-26 12:15:36,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:36,977 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 138 flow [2023-08-26 12:15:36,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-26 12:15:36,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-26 12:15:36,978 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 138 flow [2023-08-26 12:15:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:36,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:36,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:36,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:15:36,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:36,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 336459543, now seen corresponding path program 1 times [2023-08-26 12:15:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:36,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390409365] [2023-08-26 12:15:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390409365] [2023-08-26 12:15:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390409365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450091898] [2023-08-26 12:15:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:37,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 205 [2023-08-26 12:15:37,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:37,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 205 [2023-08-26 12:15:37,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:37,301 INFO L124 PetriNetUnfolderBase]: 1743/2639 cut-off events. [2023-08-26 12:15:37,302 INFO L125 PetriNetUnfolderBase]: For 2515/2608 co-relation queries the response was YES. [2023-08-26 12:15:37,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7569 conditions, 2639 events. 1743/2639 cut-off events. For 2515/2608 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13346 event pairs, 389 based on Foata normal form. 169/2794 useless extension candidates. Maximal degree in co-relation 7561. Up to 1080 conditions per place. [2023-08-26 12:15:37,316 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 43 selfloop transitions, 4 changer transitions 12/61 dead transitions. [2023-08-26 12:15:37,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 61 transitions, 404 flow [2023-08-26 12:15:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-08-26 12:15:37,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525609756097561 [2023-08-26 12:15:37,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-08-26 12:15:37,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-08-26 12:15:37,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:37,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-08-26 12:15:37,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,322 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 138 flow. Second operand 4 states and 431 transitions. [2023-08-26 12:15:37,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 61 transitions, 404 flow [2023-08-26 12:15:37,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 377 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:37,331 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 142 flow [2023-08-26 12:15:37,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-26 12:15:37,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-26 12:15:37,333 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 142 flow [2023-08-26 12:15:37,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:37,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:37,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:15:37,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:37,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1839702661, now seen corresponding path program 1 times [2023-08-26 12:15:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:37,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341082661] [2023-08-26 12:15:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:37,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341082661] [2023-08-26 12:15:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341082661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:37,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:37,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87243134] [2023-08-26 12:15:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:37,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:37,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 205 [2023-08-26 12:15:37,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:37,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 205 [2023-08-26 12:15:37,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:37,610 INFO L124 PetriNetUnfolderBase]: 788/1273 cut-off events. [2023-08-26 12:15:37,611 INFO L125 PetriNetUnfolderBase]: For 1438/1448 co-relation queries the response was YES. [2023-08-26 12:15:37,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 1273 events. 788/1273 cut-off events. For 1438/1448 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5795 event pairs, 314 based on Foata normal form. 20/1269 useless extension candidates. Maximal degree in co-relation 3715. Up to 947 conditions per place. [2023-08-26 12:15:37,619 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-08-26 12:15:37,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 270 flow [2023-08-26 12:15:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-26 12:15:37,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398373983739837 [2023-08-26 12:15:37,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-26 12:15:37,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-26 12:15:37,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:37,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-26 12:15:37,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,625 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 142 flow. Second operand 3 states and 332 transitions. [2023-08-26 12:15:37,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 270 flow [2023-08-26 12:15:37,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 251 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 12:15:37,628 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 142 flow [2023-08-26 12:15:37,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-26 12:15:37,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-26 12:15:37,629 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 142 flow [2023-08-26 12:15:37,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:37,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:37,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:15:37,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:37,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1533108784, now seen corresponding path program 1 times [2023-08-26 12:15:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402119204] [2023-08-26 12:15:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:37,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402119204] [2023-08-26 12:15:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402119204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:37,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:37,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:37,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337982725] [2023-08-26 12:15:37,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:37,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:37,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 205 [2023-08-26 12:15:37,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:37,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 205 [2023-08-26 12:15:37,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:37,891 INFO L124 PetriNetUnfolderBase]: 1148/1808 cut-off events. [2023-08-26 12:15:37,891 INFO L125 PetriNetUnfolderBase]: For 1880/1880 co-relation queries the response was YES. [2023-08-26 12:15:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 1808 events. 1148/1808 cut-off events. For 1880/1880 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8726 event pairs, 311 based on Foata normal form. 42/1813 useless extension candidates. Maximal degree in co-relation 5069. Up to 773 conditions per place. [2023-08-26 12:15:37,900 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 33 selfloop transitions, 6 changer transitions 6/47 dead transitions. [2023-08-26 12:15:37,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 299 flow [2023-08-26 12:15:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-26 12:15:37,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231707317073171 [2023-08-26 12:15:37,902 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-26 12:15:37,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-26 12:15:37,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:37,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-26 12:15:37,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,905 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,905 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 142 flow. Second operand 4 states and 429 transitions. [2023-08-26 12:15:37,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 299 flow [2023-08-26 12:15:37,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:37,910 INFO L231 Difference]: Finished difference. Result has 43 places, 27 transitions, 146 flow [2023-08-26 12:15:37,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2023-08-26 12:15:37,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 12:15:37,911 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 146 flow [2023-08-26 12:15:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:37,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:15:37,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:37,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -632393492, now seen corresponding path program 1 times [2023-08-26 12:15:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:37,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817205718] [2023-08-26 12:15:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:37,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:37,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817205718] [2023-08-26 12:15:37,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817205718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:37,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:37,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:15:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819983585] [2023-08-26 12:15:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:37,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:37,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:37,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 12:15:37,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:37,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 12:15:37,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:38,108 INFO L124 PetriNetUnfolderBase]: 770/1195 cut-off events. [2023-08-26 12:15:38,108 INFO L125 PetriNetUnfolderBase]: For 1444/1444 co-relation queries the response was YES. [2023-08-26 12:15:38,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3427 conditions, 1195 events. 770/1195 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4974 event pairs, 134 based on Foata normal form. 36/1231 useless extension candidates. Maximal degree in co-relation 3417. Up to 600 conditions per place. [2023-08-26 12:15:38,114 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 33 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-08-26 12:15:38,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 259 flow [2023-08-26 12:15:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-08-26 12:15:38,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 12:15:38,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-08-26 12:15:38,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-08-26 12:15:38,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:38,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-08-26 12:15:38,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,119 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,119 INFO L175 Difference]: Start difference. First operand has 43 places, 27 transitions, 146 flow. Second operand 4 states and 410 transitions. [2023-08-26 12:15:38,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 259 flow [2023-08-26 12:15:38,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 237 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 12:15:38,122 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 144 flow [2023-08-26 12:15:38,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-26 12:15:38,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-26 12:15:38,123 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 144 flow [2023-08-26 12:15:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:15:38,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:38,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1533246424, now seen corresponding path program 2 times [2023-08-26 12:15:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296974156] [2023-08-26 12:15:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:38,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296974156] [2023-08-26 12:15:38,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296974156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:38,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520293121] [2023-08-26 12:15:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:38,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 12:15:38,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 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) [2023-08-26 12:15:38,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:38,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 12:15:38,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:38,351 INFO L124 PetriNetUnfolderBase]: 661/1106 cut-off events. [2023-08-26 12:15:38,351 INFO L125 PetriNetUnfolderBase]: For 1744/1777 co-relation queries the response was YES. [2023-08-26 12:15:38,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 1106 events. 661/1106 cut-off events. For 1744/1777 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5769 event pairs, 235 based on Foata normal form. 51/1105 useless extension candidates. Maximal degree in co-relation 3038. Up to 722 conditions per place. [2023-08-26 12:15:38,361 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 35 selfloop transitions, 5 changer transitions 27/71 dead transitions. [2023-08-26 12:15:38,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 499 flow [2023-08-26 12:15:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:15:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:15:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 524 transitions. [2023-08-26 12:15:38,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511219512195122 [2023-08-26 12:15:38,363 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 524 transitions. [2023-08-26 12:15:38,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 524 transitions. [2023-08-26 12:15:38,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:38,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 524 transitions. [2023-08-26 12:15:38,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,367 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 144 flow. Second operand 5 states and 524 transitions. [2023-08-26 12:15:38,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 499 flow [2023-08-26 12:15:38,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 452 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:38,370 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 172 flow [2023-08-26 12:15:38,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2023-08-26 12:15:38,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-26 12:15:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 172 flow [2023-08-26 12:15:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 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) [2023-08-26 12:15:38,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:15:38,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:38,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1811248285, now seen corresponding path program 1 times [2023-08-26 12:15:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161495461] [2023-08-26 12:15:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:38,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:38,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161495461] [2023-08-26 12:15:38,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161495461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:38,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:38,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:15:38,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951005532] [2023-08-26 12:15:38,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:15:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:15:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:15:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 12:15:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:38,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 12:15:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:38,667 INFO L124 PetriNetUnfolderBase]: 474/835 cut-off events. [2023-08-26 12:15:38,667 INFO L125 PetriNetUnfolderBase]: For 1909/2053 co-relation queries the response was YES. [2023-08-26 12:15:38,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3270 conditions, 835 events. 474/835 cut-off events. For 1909/2053 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4266 event pairs, 58 based on Foata normal form. 56/868 useless extension candidates. Maximal degree in co-relation 3258. Up to 565 conditions per place. [2023-08-26 12:15:38,672 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 55 selfloop transitions, 13 changer transitions 8/80 dead transitions. [2023-08-26 12:15:38,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 582 flow [2023-08-26 12:15:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:15:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:15:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-08-26 12:15:38,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113821138211382 [2023-08-26 12:15:38,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-08-26 12:15:38,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-08-26 12:15:38,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:38,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-08-26 12:15:38,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,678 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 172 flow. Second operand 6 states and 629 transitions. [2023-08-26 12:15:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 582 flow [2023-08-26 12:15:38,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 575 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:38,681 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 275 flow [2023-08-26 12:15:38,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-26 12:15:38,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-26 12:15:38,682 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 275 flow [2023-08-26 12:15:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:15:38,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:38,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 314096858, now seen corresponding path program 1 times [2023-08-26 12:15:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433744712] [2023-08-26 12:15:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433744712] [2023-08-26 12:15:38,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433744712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:38,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:38,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:15:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631735184] [2023-08-26 12:15:38,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:15:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:15:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:15:38,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 12:15:38,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:38,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 12:15:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:38,950 INFO L124 PetriNetUnfolderBase]: 438/788 cut-off events. [2023-08-26 12:15:38,950 INFO L125 PetriNetUnfolderBase]: For 2357/2664 co-relation queries the response was YES. [2023-08-26 12:15:38,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 788 events. 438/788 cut-off events. For 2357/2664 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4163 event pairs, 16 based on Foata normal form. 92/848 useless extension candidates. Maximal degree in co-relation 3979. Up to 547 conditions per place. [2023-08-26 12:15:38,954 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 48 selfloop transitions, 13 changer transitions 33/98 dead transitions. [2023-08-26 12:15:38,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 821 flow [2023-08-26 12:15:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:15:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:15:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 835 transitions. [2023-08-26 12:15:38,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2023-08-26 12:15:38,957 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 835 transitions. [2023-08-26 12:15:38,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 835 transitions. [2023-08-26 12:15:38,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:38,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 835 transitions. [2023-08-26 12:15:38,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.375) internal successors, (835), 8 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,962 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,962 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 275 flow. Second operand 8 states and 835 transitions. [2023-08-26 12:15:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 821 flow [2023-08-26 12:15:38,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 781 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:38,973 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 307 flow [2023-08-26 12:15:38,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 12:15:38,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-26 12:15:38,973 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 307 flow [2023-08-26 12:15:38,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:38,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:15:38,974 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:38,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash -599798906, now seen corresponding path program 1 times [2023-08-26 12:15:38,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311949834] [2023-08-26 12:15:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:39,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311949834] [2023-08-26 12:15:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311949834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:39,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:39,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:15:39,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413674621] [2023-08-26 12:15:39,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:39,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:15:39,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:15:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:15:39,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-26 12:15:39,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:39,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-26 12:15:39,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:39,189 INFO L124 PetriNetUnfolderBase]: 350/618 cut-off events. [2023-08-26 12:15:39,189 INFO L125 PetriNetUnfolderBase]: For 2470/2470 co-relation queries the response was YES. [2023-08-26 12:15:39,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 618 events. 350/618 cut-off events. For 2470/2470 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2596 event pairs, 27 based on Foata normal form. 6/624 useless extension candidates. Maximal degree in co-relation 3006. Up to 291 conditions per place. [2023-08-26 12:15:39,192 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 42 selfloop transitions, 10 changer transitions 36/88 dead transitions. [2023-08-26 12:15:39,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 872 flow [2023-08-26 12:15:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:15:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:15:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2023-08-26 12:15:39,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861788617886179 [2023-08-26 12:15:39,195 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2023-08-26 12:15:39,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2023-08-26 12:15:39,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:39,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2023-08-26 12:15:39,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,198 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,198 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 307 flow. Second operand 6 states and 598 transitions. [2023-08-26 12:15:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 872 flow [2023-08-26 12:15:39,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 88 transitions, 680 flow, removed 68 selfloop flow, removed 7 redundant places. [2023-08-26 12:15:39,206 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 241 flow [2023-08-26 12:15:39,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2023-08-26 12:15:39,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2023-08-26 12:15:39,207 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 241 flow [2023-08-26 12:15:39,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:39,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:39,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:15:39,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:39,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash 21176976, now seen corresponding path program 1 times [2023-08-26 12:15:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052121133] [2023-08-26 12:15:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:39,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052121133] [2023-08-26 12:15:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052121133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:39,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:39,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:15:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175531777] [2023-08-26 12:15:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:15:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:15:39,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:15:39,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 12:15:39,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:39,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 12:15:39,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:39,404 INFO L124 PetriNetUnfolderBase]: 325/602 cut-off events. [2023-08-26 12:15:39,404 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-26 12:15:39,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 602 events. 325/602 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2660 event pairs, 65 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 2508. Up to 232 conditions per place. [2023-08-26 12:15:39,407 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 38 selfloop transitions, 6 changer transitions 47/91 dead transitions. [2023-08-26 12:15:39,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 739 flow [2023-08-26 12:15:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:15:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:15:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 608 transitions. [2023-08-26 12:15:39,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2023-08-26 12:15:39,409 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 608 transitions. [2023-08-26 12:15:39,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 608 transitions. [2023-08-26 12:15:39,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:39,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 608 transitions. [2023-08-26 12:15:39,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,412 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,412 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 241 flow. Second operand 6 states and 608 transitions. [2023-08-26 12:15:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 739 flow [2023-08-26 12:15:39,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 723 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-26 12:15:39,418 INFO L231 Difference]: Finished difference. Result has 60 places, 35 transitions, 237 flow [2023-08-26 12:15:39,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2023-08-26 12:15:39,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-08-26 12:15:39,419 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 237 flow [2023-08-26 12:15:39,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:39,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:39,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:15:39,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 12:15:39,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1169305538, now seen corresponding path program 2 times [2023-08-26 12:15:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:39,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634294066] [2023-08-26 12:15:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:39,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:39,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634294066] [2023-08-26 12:15:39,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634294066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:39,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:39,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:15:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125166973] [2023-08-26 12:15:39,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:39,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:15:39,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:39,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:15:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:15:39,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 12:15:39,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 35 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:39,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 12:15:39,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:39,611 INFO L124 PetriNetUnfolderBase]: 135/281 cut-off events. [2023-08-26 12:15:39,612 INFO L125 PetriNetUnfolderBase]: For 653/740 co-relation queries the response was YES. [2023-08-26 12:15:39,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 281 events. 135/281 cut-off events. For 653/740 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1175 event pairs, 9 based on Foata normal form. 40/311 useless extension candidates. Maximal degree in co-relation 1124. Up to 97 conditions per place. [2023-08-26 12:15:39,613 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2023-08-26 12:15:39,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 454 flow [2023-08-26 12:15:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:15:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:15:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 809 transitions. [2023-08-26 12:15:39,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49329268292682926 [2023-08-26 12:15:39,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 809 transitions. [2023-08-26 12:15:39,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 809 transitions. [2023-08-26 12:15:39,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:39,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 809 transitions. [2023-08-26 12:15:39,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,621 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,621 INFO L175 Difference]: Start difference. First operand has 60 places, 35 transitions, 237 flow. Second operand 8 states and 809 transitions. [2023-08-26 12:15:39,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 454 flow [2023-08-26 12:15:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 411 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 12:15:39,624 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2023-08-26 12:15:39,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2023-08-26 12:15:39,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2023-08-26 12:15:39,624 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2023-08-26 12:15:39,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-08-26 12:15:39,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-08-26 12:15:39,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-26 12:15:39,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-26 12:15:39,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (4 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 13 remaining) [2023-08-26 12:15:39,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2023-08-26 12:15:39,629 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 13 remaining) [2023-08-26 12:15:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:15:39,629 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:39,631 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:15:39,631 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:15:39,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:15:39 BasicIcfg [2023-08-26 12:15:39,634 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:15:39,634 INFO L158 Benchmark]: Toolchain (without parser) took 8233.91ms. Allocated memory was 381.7MB in the beginning and 633.3MB in the end (delta: 251.7MB). Free memory was 356.9MB in the beginning and 269.5MB in the end (delta: 87.5MB). Peak memory consumption was 340.6MB. Max. memory is 16.0GB. [2023-08-26 12:15:39,634 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 381.7MB. Free memory is still 358.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:15:39,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.06ms. Allocated memory is still 381.7MB. Free memory was 356.5MB in the beginning and 336.4MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:15:39,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.86ms. Allocated memory is still 381.7MB. Free memory was 336.0MB in the beginning and 333.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:15:39,635 INFO L158 Benchmark]: Boogie Preprocessor took 41.51ms. Allocated memory is still 381.7MB. Free memory was 333.9MB in the beginning and 332.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:15:39,635 INFO L158 Benchmark]: RCFGBuilder took 396.78ms. Allocated memory is still 381.7MB. Free memory was 332.5MB in the beginning and 316.6MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 12:15:39,636 INFO L158 Benchmark]: TraceAbstraction took 7260.33ms. Allocated memory was 381.7MB in the beginning and 633.3MB in the end (delta: 251.7MB). Free memory was 316.1MB in the beginning and 269.5MB in the end (delta: 46.7MB). Peak memory consumption was 300.8MB. Max. memory is 16.0GB. [2023-08-26 12:15:39,637 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 381.7MB. Free memory is still 358.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 473.06ms. Allocated memory is still 381.7MB. Free memory was 356.5MB in the beginning and 336.4MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.86ms. Allocated memory is still 381.7MB. Free memory was 336.0MB in the beginning and 333.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 41.51ms. Allocated memory is still 381.7MB. Free memory was 333.9MB in the beginning and 332.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 396.78ms. Allocated memory is still 381.7MB. Free memory was 332.5MB in the beginning and 316.6MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 7260.33ms. Allocated memory was 381.7MB in the beginning and 633.3MB in the end (delta: 251.7MB). Free memory was 316.1MB in the beginning and 269.5MB in the end (delta: 46.7MB). Peak memory consumption was 300.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 103 PlacesBefore, 41 PlacesAfterwards, 91 TransitionsBefore, 28 TransitionsAfterwards, 1766 CoEnabledTransitionPairs, 5 FixpointIterations, 30 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 94 TotalNumberOfCompositions, 2807 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1501, independent: 1428, independent conditional: 0, independent unconditional: 1428, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 881, independent: 857, independent conditional: 0, independent unconditional: 857, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1501, independent: 571, independent conditional: 0, independent unconditional: 571, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 881, unknown conditional: 0, unknown unconditional: 881] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 46, Positive conditional cache size: 0, Positive unconditional cache size: 46, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 139 locations, 13 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.2s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 272 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 272 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 846 IncrementalHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 13 mSDtfsCounter, 846 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307occurred in iteration=11, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 728 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:15:39,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...