/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:27:33,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:27:33,575 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 18:27:33,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:27:33,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:27:33,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:27:33,591 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:27:33,591 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:27:33,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:27:33,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:27:33,592 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:27:33,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:27:33,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:27:33,593 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:27:33,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:27:33,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:27:33,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:27:33,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:27:33,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:27:33,594 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:27:33,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:27:33,597 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:27:33,597 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:27:33,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:27:33,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:27:33,598 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:27:33,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:27:33,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:27:33,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:27:33,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:27:33,599 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:27:33,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:27:33,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:27:33,599 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:27:33,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:27:33,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:27:33,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:27:33,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:27:33,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:27:33,839 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:27:33,839 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:27:33,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:27:34,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:27:35,002 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:27:35,002 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:27:35,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f02435ea/f1031b79ec754a5195d951ed6e4f8577/FLAGe74a2cdad [2023-08-26 18:27:35,024 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f02435ea/f1031b79ec754a5195d951ed6e4f8577 [2023-08-26 18:27:35,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:27:35,029 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:27:35,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:27:35,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:27:35,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:27:35,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efeed28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35, skipping insertion in model container [2023-08-26 18:27:35,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,082 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:27:35,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:27:35,341 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:27:35,369 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:27:35,371 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:27:35,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:27:35,404 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:27:35,405 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:27:35,409 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:27:35,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35 WrapperNode [2023-08-26 18:27:35,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:27:35,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:27:35,410 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:27:35,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:27:35,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,446 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 18:27:35,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:27:35,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:27:35,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:27:35,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:27:35,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,471 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:27:35,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:27:35,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:27:35,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:27:35,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (1/1) ... [2023-08-26 18:27:35,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:27:35,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:27:35,501 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 18:27:35,507 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 18:27:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:27:35,529 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:27:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:27:35,529 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:27:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:27:35,530 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:27:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:27:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:27:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:27:35,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:27:35,531 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 18:27:35,646 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:27:35,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:27:35,831 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:27:35,835 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:27:35,835 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:27:35,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:27:35 BoogieIcfgContainer [2023-08-26 18:27:35,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:27:35,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:27:35,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:27:35,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:27:35,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:27:35" (1/3) ... [2023-08-26 18:27:35,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:27:35, skipping insertion in model container [2023-08-26 18:27:35,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:27:35" (2/3) ... [2023-08-26 18:27:35,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:27:35, skipping insertion in model container [2023-08-26 18:27:35,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:27:35" (3/3) ... [2023-08-26 18:27:35,841 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:27:35,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:27:35,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:27:35,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:27:35,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:27:35,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 18:27:35,983 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 18:27:35,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:27:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 3/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 18:27:35,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 18:27:35,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 18:27:35,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:27:36,002 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 18:27:36,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 18:27:36,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 18:27:36,023 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 18:27:36,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:27:36,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 78 events. 1/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 18:27:36,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 18:27:37,749 INFO L134 LiptonReduction]: Checked pairs total: 2448 [2023-08-26 18:27:37,749 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-26 18:27:37,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:27:37,764 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;@64bae7a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:27:37,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:27:37,765 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:27:37,765 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:27:37,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:27:37,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:37,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:27:37,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:37,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash 326, now seen corresponding path program 1 times [2023-08-26 18:27:37,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:37,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020060604] [2023-08-26 18:27:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:37,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:37,849 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 18:27:37,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:37,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020060604] [2023-08-26 18:27:37,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020060604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:37,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:37,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:27:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608270213] [2023-08-26 18:27:37,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:27:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:27:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:27:37,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 168 [2023-08-26 18:27:37,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 18:27:37,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:37,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 168 [2023-08-26 18:27:37,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:37,919 INFO L124 PetriNetUnfolderBase]: 164/293 cut-off events. [2023-08-26 18:27:37,919 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:27:37,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 293 events. 164/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1199 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 583. Up to 271 conditions per place. [2023-08-26 18:27:37,922 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 18:27:37,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 18:27:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:27:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:27:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-08-26 18:27:37,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2023-08-26 18:27:37,931 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-08-26 18:27:37,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-08-26 18:27:37,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:37,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-08-26 18:27:37,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 18:27:37,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 18:27:37,938 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 18:27:37,939 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 57 flow. Second operand 2 states and 197 transitions. [2023-08-26 18:27:37,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 18:27:37,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:27:37,941 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 18:27:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 18:27:37,945 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 18:27:37,945 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 18:27:37,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 18:27:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:27:37,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:37,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2114760814, now seen corresponding path program 1 times [2023-08-26 18:27:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745384942] [2023-08-26 18:27:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:38,173 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 18:27:38,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:38,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745384942] [2023-08-26 18:27:38,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745384942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:38,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:27:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431914806] [2023-08-26 18:27:38,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:27:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:27:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:27:38,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 168 [2023-08-26 18:27:38,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 18:27:38,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:38,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 168 [2023-08-26 18:27:38,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:38,229 INFO L124 PetriNetUnfolderBase]: 143/263 cut-off events. [2023-08-26 18:27:38,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:27:38,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 263 events. 143/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1066 event pairs, 53 based on Foata normal form. 9/268 useless extension candidates. Maximal degree in co-relation 529. Up to 154 conditions per place. [2023-08-26 18:27:38,235 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 17 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-08-26 18:27:38,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 22 transitions, 88 flow [2023-08-26 18:27:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:27:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:27:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 18:27:38,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456349206349206 [2023-08-26 18:27:38,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 18:27:38,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 18:27:38,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:38,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 18:27:38,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 18:27:38,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:38,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:38,240 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 275 transitions. [2023-08-26 18:27:38,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 22 transitions, 88 flow [2023-08-26 18:27:38,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:27:38,241 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 48 flow [2023-08-26 18:27:38,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-26 18:27:38,241 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 18:27:38,242 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 48 flow [2023-08-26 18:27:38,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 18:27:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:38,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:27:38,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:38,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1133076443, now seen corresponding path program 1 times [2023-08-26 18:27:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886875910] [2023-08-26 18:27:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:38,370 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 18:27:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886875910] [2023-08-26 18:27:38,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886875910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:38,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:38,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:27:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435900067] [2023-08-26 18:27:38,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:38,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:27:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:27:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:27:38,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 168 [2023-08-26 18:27:38,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 18:27:38,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:38,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 168 [2023-08-26 18:27:38,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:38,433 INFO L124 PetriNetUnfolderBase]: 329/570 cut-off events. [2023-08-26 18:27:38,433 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-26 18:27:38,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 570 events. 329/570 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2477 event pairs, 63 based on Foata normal form. 32/602 useless extension candidates. Maximal degree in co-relation 1239. Up to 252 conditions per place. [2023-08-26 18:27:38,435 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 25 selfloop transitions, 3 changer transitions 3/32 dead transitions. [2023-08-26 18:27:38,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 145 flow [2023-08-26 18:27:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:27:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:27:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-26 18:27:38,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-26 18:27:38,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-26 18:27:38,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-26 18:27:38,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:38,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-26 18:27:38,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states 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 18:27:38,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:38,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:38,440 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 48 flow. Second operand 4 states and 357 transitions. [2023-08-26 18:27:38,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 145 flow [2023-08-26 18:27:38,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:27:38,441 INFO L231 Difference]: Finished difference. Result has 31 places, 17 transitions, 58 flow [2023-08-26 18:27:38,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=17} [2023-08-26 18:27:38,441 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2023-08-26 18:27:38,442 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 17 transitions, 58 flow [2023-08-26 18:27:38,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 18:27:38,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:38,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:38,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:27:38,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:38,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash -765645468, now seen corresponding path program 1 times [2023-08-26 18:27:38,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:38,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531577554] [2023-08-26 18:27:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:38,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:38,523 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 18:27:38,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:38,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531577554] [2023-08-26 18:27:38,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531577554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:38,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:38,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:27:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050426051] [2023-08-26 18:27:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:38,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:27:38,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:27:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:27:38,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 168 [2023-08-26 18:27:38,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 17 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 18:27:38,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:38,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 168 [2023-08-26 18:27:38,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:38,589 INFO L124 PetriNetUnfolderBase]: 327/548 cut-off events. [2023-08-26 18:27:38,589 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2023-08-26 18:27:38,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 548 events. 327/548 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2191 event pairs, 51 based on Foata normal form. 24/572 useless extension candidates. Maximal degree in co-relation 1347. Up to 301 conditions per place. [2023-08-26 18:27:38,591 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 30 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-08-26 18:27:38,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 180 flow [2023-08-26 18:27:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:27:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:27:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-08-26 18:27:38,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-26 18:27:38,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-08-26 18:27:38,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-08-26 18:27:38,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:38,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-08-26 18:27:38,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 18:27:38,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:38,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:38,595 INFO L175 Difference]: Start difference. First operand has 31 places, 17 transitions, 58 flow. Second operand 4 states and 350 transitions. [2023-08-26 18:27:38,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 180 flow [2023-08-26 18:27:38,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 36 transitions, 164 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:27:38,596 INFO L231 Difference]: Finished difference. Result has 33 places, 20 transitions, 88 flow [2023-08-26 18:27:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=33, PETRI_TRANSITIONS=20} [2023-08-26 18:27:38,597 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-26 18:27:38,597 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 20 transitions, 88 flow [2023-08-26 18:27:38,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 18:27:38,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:38,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:27:38,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:38,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2034792286, now seen corresponding path program 1 times [2023-08-26 18:27:38,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:38,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984945018] [2023-08-26 18:27:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:38,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:38,715 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 18:27:38,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:38,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984945018] [2023-08-26 18:27:38,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984945018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:38,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:38,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:27:38,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124674320] [2023-08-26 18:27:38,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:38,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:27:38,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:27:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:27:38,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 168 [2023-08-26 18:27:38,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 20 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 18:27:38,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:38,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 168 [2023-08-26 18:27:38,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:38,814 INFO L124 PetriNetUnfolderBase]: 423/716 cut-off events. [2023-08-26 18:27:38,814 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-08-26 18:27:38,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 716 events. 423/716 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3070 event pairs, 103 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 1936. Up to 277 conditions per place. [2023-08-26 18:27:38,817 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 27 selfloop transitions, 6 changer transitions 16/49 dead transitions. [2023-08-26 18:27:38,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 272 flow [2023-08-26 18:27:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:27:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:27:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 517 transitions. [2023-08-26 18:27:38,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128968253968254 [2023-08-26 18:27:38,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 517 transitions. [2023-08-26 18:27:38,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 517 transitions. [2023-08-26 18:27:38,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:38,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 517 transitions. [2023-08-26 18:27:38,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:27:38,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 18:27:38,821 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 18:27:38,821 INFO L175 Difference]: Start difference. First operand has 33 places, 20 transitions, 88 flow. Second operand 6 states and 517 transitions. [2023-08-26 18:27:38,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 272 flow [2023-08-26 18:27:38,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:27:38,823 INFO L231 Difference]: Finished difference. Result has 39 places, 20 transitions, 104 flow [2023-08-26 18:27:38,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=20} [2023-08-26 18:27:38,823 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 18:27:38,824 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 20 transitions, 104 flow [2023-08-26 18:27:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 18:27:38,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:38,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:38,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:27:38,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:38,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2034752296, now seen corresponding path program 2 times [2023-08-26 18:27:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:38,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207229832] [2023-08-26 18:27:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:38,884 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 18:27:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:38,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207229832] [2023-08-26 18:27:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207229832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:38,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:27:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949633292] [2023-08-26 18:27:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:27:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:27:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:27:38,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 18:27:38,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 20 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 18:27:38,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:38,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 18:27:38,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:38,920 INFO L124 PetriNetUnfolderBase]: 130/262 cut-off events. [2023-08-26 18:27:38,920 INFO L125 PetriNetUnfolderBase]: For 373/379 co-relation queries the response was YES. [2023-08-26 18:27:38,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 262 events. 130/262 cut-off events. For 373/379 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1055 event pairs, 41 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 764. Up to 205 conditions per place. [2023-08-26 18:27:38,921 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 22 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-26 18:27:38,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 203 flow [2023-08-26 18:27:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:27:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:27:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 18:27:38,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2023-08-26 18:27:38,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 18:27:38,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 18:27:38,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:38,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 18:27:38,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 18:27:38,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:38,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:38,940 INFO L175 Difference]: Start difference. First operand has 39 places, 20 transitions, 104 flow. Second operand 3 states and 274 transitions. [2023-08-26 18:27:38,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 203 flow [2023-08-26 18:27:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 180 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 18:27:38,942 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 112 flow [2023-08-26 18:27:38,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-26 18:27:38,942 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-26 18:27:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 112 flow [2023-08-26 18:27:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 18:27:38,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:38,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:27:38,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:38,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:38,943 INFO L85 PathProgramCache]: Analyzing trace with hash 830576796, now seen corresponding path program 1 times [2023-08-26 18:27:38,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:38,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881344862] [2023-08-26 18:27:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:38,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:39,002 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 18:27:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881344862] [2023-08-26 18:27:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881344862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:27:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002989763] [2023-08-26 18:27:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:27:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:27:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:27:39,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 18:27:39,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 18:27:39,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:39,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 18:27:39,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:39,040 INFO L124 PetriNetUnfolderBase]: 81/182 cut-off events. [2023-08-26 18:27:39,040 INFO L125 PetriNetUnfolderBase]: For 161/191 co-relation queries the response was YES. [2023-08-26 18:27:39,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 182 events. 81/182 cut-off events. For 161/191 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 671 event pairs, 16 based on Foata normal form. 35/208 useless extension candidates. Maximal degree in co-relation 599. Up to 86 conditions per place. [2023-08-26 18:27:39,041 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 27 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2023-08-26 18:27:39,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 252 flow [2023-08-26 18:27:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:27:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:27:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2023-08-26 18:27:39,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-26 18:27:39,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 364 transitions. [2023-08-26 18:27:39,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 364 transitions. [2023-08-26 18:27:39,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:39,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 364 transitions. [2023-08-26 18:27:39,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 18:27:39,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:39,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:39,044 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 112 flow. Second operand 4 states and 364 transitions. [2023-08-26 18:27:39,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 252 flow [2023-08-26 18:27:39,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:27:39,045 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 148 flow [2023-08-26 18:27:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 18:27:39,046 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 18:27:39,046 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 148 flow [2023-08-26 18:27:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 18:27:39,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:39,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:39,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:27:39,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:39,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -724491605, now seen corresponding path program 1 times [2023-08-26 18:27:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:39,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991072339] [2023-08-26 18:27:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:39,122 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 18:27:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:39,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991072339] [2023-08-26 18:27:39,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991072339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:39,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:39,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:27:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129519929] [2023-08-26 18:27:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:27:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:27:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:27:39,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 18:27:39,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 18:27:39,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:39,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 18:27:39,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:39,161 INFO L124 PetriNetUnfolderBase]: 67/150 cut-off events. [2023-08-26 18:27:39,161 INFO L125 PetriNetUnfolderBase]: For 312/366 co-relation queries the response was YES. [2023-08-26 18:27:39,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 150 events. 67/150 cut-off events. For 312/366 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 523 event pairs, 12 based on Foata normal form. 48/190 useless extension candidates. Maximal degree in co-relation 561. Up to 66 conditions per place. [2023-08-26 18:27:39,162 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 23 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2023-08-26 18:27:39,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 276 flow [2023-08-26 18:27:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:27:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:27:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2023-08-26 18:27:39,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2023-08-26 18:27:39,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2023-08-26 18:27:39,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2023-08-26 18:27:39,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:39,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2023-08-26 18:27:39,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 18:27:39,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 18:27:39,166 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 18:27:39,166 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 148 flow. Second operand 5 states and 447 transitions. [2023-08-26 18:27:39,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 276 flow [2023-08-26 18:27:39,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 253 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 18:27:39,167 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 157 flow [2023-08-26 18:27:39,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-26 18:27:39,168 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 18:27:39,168 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 157 flow [2023-08-26 18:27:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 18:27:39,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:39,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:27:39,169 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:39,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1000813848, now seen corresponding path program 1 times [2023-08-26 18:27:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:39,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903255276] [2023-08-26 18:27:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:39,266 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 18:27:39,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:39,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903255276] [2023-08-26 18:27:39,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903255276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:39,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:39,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:27:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570284758] [2023-08-26 18:27:39,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:39,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:27:39,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:27:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:27:39,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 168 [2023-08-26 18:27:39,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 18:27:39,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:39,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 168 [2023-08-26 18:27:39,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:39,343 INFO L124 PetriNetUnfolderBase]: 140/279 cut-off events. [2023-08-26 18:27:39,343 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2023-08-26 18:27:39,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 279 events. 140/279 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1008 event pairs, 32 based on Foata normal form. 1/280 useless extension candidates. Maximal degree in co-relation 1074. Up to 111 conditions per place. [2023-08-26 18:27:39,345 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 31 selfloop transitions, 6 changer transitions 25/62 dead transitions. [2023-08-26 18:27:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 505 flow [2023-08-26 18:27:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:27:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:27:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 513 transitions. [2023-08-26 18:27:39,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2023-08-26 18:27:39,346 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 513 transitions. [2023-08-26 18:27:39,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 513 transitions. [2023-08-26 18:27:39,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:39,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 513 transitions. [2023-08-26 18:27:39,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:27:39,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 18:27:39,349 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 18:27:39,349 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 157 flow. Second operand 6 states and 513 transitions. [2023-08-26 18:27:39,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 505 flow [2023-08-26 18:27:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 427 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-26 18:27:39,351 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 149 flow [2023-08-26 18:27:39,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-26 18:27:39,352 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-08-26 18:27:39,352 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 149 flow [2023-08-26 18:27:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 18:27:39,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:27:39,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:39,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:27:39,353 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:27:39,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:27:39,353 INFO L85 PathProgramCache]: Analyzing trace with hash -736688398, now seen corresponding path program 2 times [2023-08-26 18:27:39,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:27:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014160582] [2023-08-26 18:27:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:27:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:27:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:27:39,436 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 18:27:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:27:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014160582] [2023-08-26 18:27:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014160582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:27:39,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:27:39,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:27:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888613941] [2023-08-26 18:27:39,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:27:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:27:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:27:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:27:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:27:39,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 18:27:39,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 18:27:39,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:27:39,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 18:27:39,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:27:39,477 INFO L124 PetriNetUnfolderBase]: 84/197 cut-off events. [2023-08-26 18:27:39,478 INFO L125 PetriNetUnfolderBase]: For 427/429 co-relation queries the response was YES. [2023-08-26 18:27:39,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 197 events. 84/197 cut-off events. For 427/429 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 777 event pairs, 12 based on Foata normal form. 3/199 useless extension candidates. Maximal degree in co-relation 732. Up to 110 conditions per place. [2023-08-26 18:27:39,478 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2023-08-26 18:27:39,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 341 flow [2023-08-26 18:27:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:27:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:27:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2023-08-26 18:27:39,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-08-26 18:27:39,479 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2023-08-26 18:27:39,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2023-08-26 18:27:39,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:27:39,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2023-08-26 18:27:39,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 18:27:39,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:39,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:27:39,481 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 149 flow. Second operand 4 states and 360 transitions. [2023-08-26 18:27:39,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 341 flow [2023-08-26 18:27:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 327 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:27:39,482 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-26 18:27:39,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-26 18:27:39,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-26 18:27:39,483 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-26 18:27:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 18:27:39,485 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:27:39,485 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:27:39,485 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:27:39,485 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:27:39,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:27:39,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:27:39,486 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 18:27:39,488 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:27:39,488 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:27:39,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:27:39 BasicIcfg [2023-08-26 18:27:39,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:27:39,490 INFO L158 Benchmark]: Toolchain (without parser) took 4461.40ms. Allocated memory was 350.2MB in the beginning and 459.3MB in the end (delta: 109.1MB). Free memory was 325.5MB in the beginning and 246.3MB in the end (delta: 79.1MB). Peak memory consumption was 191.3MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,490 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 350.2MB. Free memory was 327.4MB in the beginning and 327.3MB in the end (delta: 64.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:27:39,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.88ms. Allocated memory is still 350.2MB. Free memory was 325.0MB in the beginning and 305.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,491 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.48ms. Allocated memory is still 350.2MB. Free memory was 305.1MB in the beginning and 302.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,491 INFO L158 Benchmark]: Boogie Preprocessor took 27.21ms. Allocated memory is still 350.2MB. Free memory was 302.9MB in the beginning and 301.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,491 INFO L158 Benchmark]: RCFGBuilder took 361.83ms. Allocated memory is still 350.2MB. Free memory was 301.4MB in the beginning and 286.0MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,491 INFO L158 Benchmark]: TraceAbstraction took 3651.89ms. Allocated memory was 350.2MB in the beginning and 459.3MB in the end (delta: 109.1MB). Free memory was 285.1MB in the beginning and 246.3MB in the end (delta: 38.8MB). Peak memory consumption was 149.4MB. Max. memory is 16.0GB. [2023-08-26 18:27:39,492 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 350.2MB. Free memory was 327.4MB in the beginning and 327.3MB in the end (delta: 64.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 378.88ms. Allocated memory is still 350.2MB. Free memory was 325.0MB in the beginning and 305.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.48ms. Allocated memory is still 350.2MB. Free memory was 305.1MB in the beginning and 302.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.21ms. Allocated memory is still 350.2MB. Free memory was 302.9MB in the beginning and 301.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 361.83ms. Allocated memory is still 350.2MB. Free memory was 301.4MB in the beginning and 286.0MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3651.89ms. Allocated memory was 350.2MB in the beginning and 459.3MB in the end (delta: 109.1MB). Free memory was 285.1MB in the beginning and 246.3MB in the end (delta: 38.8MB). Peak memory consumption was 149.4MB. 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: 1.7s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 24 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 28 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 73 TotalNumberOfCompositions, 2448 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1211, independent: 1126, independent conditional: 0, independent unconditional: 1126, dependent: 85, dependent conditional: 0, dependent unconditional: 85, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 668, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1211, independent: 490, independent conditional: 0, independent unconditional: 490, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 668, unknown conditional: 0, unknown unconditional: 668] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, 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: 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 7 procedures, 117 locations, 10 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: 3.6s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 137 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 137 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 467 IncrementalHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 12 mSDtfsCounter, 467 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred in iteration=8, InterpolantAutomatonStates: 41, 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, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 340 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:27:39,507 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...