/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:38:59,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:38:59,336 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 13:38:59,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:38:59,345 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:38:59,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:38:59,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:38:59,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:38:59,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:38:59,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:38:59,384 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:38:59,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:38:59,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:38:59,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:38:59,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:38:59,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:38:59,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:38:59,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:38:59,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:38:59,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:38:59,388 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:38:59,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:38:59,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:38:59,393 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:38:59,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:38:59,396 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:38:59,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:38:59,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:38:59,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:38:59,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:38:59,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:38:59,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:38:59,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:38:59,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:38:59,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:38:59,400 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:38:59,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:38:59,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:38:59,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:38:59,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:38:59,746 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:38:59,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-26 13:39:01,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:39:01,257 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:39:01,258 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-26 13:39:01,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e4c35ac/11feb627bc484d8c83f9391549fbc377/FLAGc24ccc7bc [2023-08-26 13:39:01,279 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e4c35ac/11feb627bc484d8c83f9391549fbc377 [2023-08-26 13:39:01,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:39:01,286 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:39:01,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:39:01,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:39:01,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:39:01,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1289734b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01, skipping insertion in model container [2023-08-26 13:39:01,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,314 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:39:01,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:39:01,480 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:39:01,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:39:01,504 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:39:01,505 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:39:01,510 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:39:01,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01 WrapperNode [2023-08-26 13:39:01,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:39:01,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:39:01,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:39:01,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:39:01,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,539 INFO L138 Inliner]: procedures = 22, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-26 13:39:01,540 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:39:01,540 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:39:01,540 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:39:01,540 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:39:01,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:39:01,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:39:01,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:39:01,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:39:01,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (1/1) ... [2023-08-26 13:39:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:39:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:01,590 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 13:39:01,599 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 13:39:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:39:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:39:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:39:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:39:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:39:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:39:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:39:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:39:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:39:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:39:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:39:01,635 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 13:39:01,728 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:39:01,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:39:01,949 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:39:01,990 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:39:01,990 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 13:39:01,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:39:01 BoogieIcfgContainer [2023-08-26 13:39:01,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:39:01,994 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:39:01,994 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:39:01,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:39:01,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:39:01" (1/3) ... [2023-08-26 13:39:01,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248899ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:39:01, skipping insertion in model container [2023-08-26 13:39:01,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:39:01" (2/3) ... [2023-08-26 13:39:01,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248899ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:39:01, skipping insertion in model container [2023-08-26 13:39:01,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:39:01" (3/3) ... [2023-08-26 13:39:02,000 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-26 13:39:02,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:39:02,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:39:02,013 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:39:02,081 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:39:02,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2023-08-26 13:39:02,152 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-08-26 13:39:02,152 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:39:02,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-26 13:39:02,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2023-08-26 13:39:02,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2023-08-26 13:39:02,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:39:02,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 93 transitions, 204 flow [2023-08-26 13:39:02,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 93 transitions, 204 flow [2023-08-26 13:39:02,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 204 flow [2023-08-26 13:39:02,220 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-08-26 13:39:02,220 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:39:02,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 7/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-26 13:39:02,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 1124 [2023-08-26 13:39:05,350 INFO L134 LiptonReduction]: Checked pairs total: 1820 [2023-08-26 13:39:05,350 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-26 13:39:05,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:39:05,377 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;@15a70a18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:39:05,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:39:05,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:39:05,378 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:39:05,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:05,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:39:05,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:05,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash 414, now seen corresponding path program 1 times [2023-08-26 13:39:05,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181778233] [2023-08-26 13:39:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:05,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:05,469 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 13:39:05,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:05,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181778233] [2023-08-26 13:39:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181778233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:05,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:05,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:39:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989652754] [2023-08-26 13:39:05,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:39:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:39:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:39:05,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 191 [2023-08-26 13:39:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 13:39:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:05,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 191 [2023-08-26 13:39:05,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:05,599 INFO L124 PetriNetUnfolderBase]: 259/418 cut-off events. [2023-08-26 13:39:05,600 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:39:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 418 events. 259/418 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1794 event pairs, 203 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 684. Up to 411 conditions per place. [2023-08-26 13:39:05,606 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 29 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-08-26 13:39:05,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 142 flow [2023-08-26 13:39:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:39:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:39:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 217 transitions. [2023-08-26 13:39:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680628272251309 [2023-08-26 13:39:05,619 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 217 transitions. [2023-08-26 13:39:05,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 217 transitions. [2023-08-26 13:39:05,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:05,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 217 transitions. [2023-08-26 13:39:05,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 13:39:05,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 13:39:05,629 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 13:39:05,631 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 88 flow. Second operand 2 states and 217 transitions. [2023-08-26 13:39:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 142 flow [2023-08-26 13:39:05,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:39:05,636 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 72 flow [2023-08-26 13:39:05,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-26 13:39:05,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 13:39:05,640 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 72 flow [2023-08-26 13:39:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 13:39:05,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:05,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:39:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:39:05,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:05,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 408302, now seen corresponding path program 1 times [2023-08-26 13:39:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:05,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381424073] [2023-08-26 13:39:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:05,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:05,881 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 13:39:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381424073] [2023-08-26 13:39:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381424073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:05,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819701174] [2023-08-26 13:39:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:05,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 191 [2023-08-26 13:39:05,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:05,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:05,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 191 [2023-08-26 13:39:05,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:05,986 INFO L124 PetriNetUnfolderBase]: 247/397 cut-off events. [2023-08-26 13:39:05,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:05,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 397 events. 247/397 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1704 event pairs, 194 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 799. Up to 389 conditions per place. [2023-08-26 13:39:05,996 INFO L140 encePairwiseOnDemand]: 188/191 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 13:39:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 122 flow [2023-08-26 13:39:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 13:39:05,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663176265270506 [2023-08-26 13:39:05,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 13:39:05,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 13:39:05,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:05,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 13:39:06,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 13:39:06,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,003 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 72 flow. Second operand 3 states and 233 transitions. [2023-08-26 13:39:06,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 122 flow [2023-08-26 13:39:06,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:39:06,004 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-08-26 13:39:06,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-26 13:39:06,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 13:39:06,005 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-08-26 13:39:06,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:06,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:39:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:39:06,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 408303, now seen corresponding path program 1 times [2023-08-26 13:39:06,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108058744] [2023-08-26 13:39:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:06,135 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 13:39:06,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:06,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108058744] [2023-08-26 13:39:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108058744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:06,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:06,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783889575] [2023-08-26 13:39:06,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:06,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 191 [2023-08-26 13:39:06,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 13:39:06,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:06,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 191 [2023-08-26 13:39:06,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:06,201 INFO L124 PetriNetUnfolderBase]: 235/376 cut-off events. [2023-08-26 13:39:06,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:06,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 376 events. 235/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1588 event pairs, 185 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 758. Up to 368 conditions per place. [2023-08-26 13:39:06,204 INFO L140 encePairwiseOnDemand]: 188/191 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 13:39:06,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2023-08-26 13:39:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-26 13:39:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418848167539267 [2023-08-26 13:39:06,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-26 13:39:06,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-26 13:39:06,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:06,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-26 13:39:06,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 13:39:06,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,213 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 240 transitions. [2023-08-26 13:39:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2023-08-26 13:39:06,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:06,214 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 67 flow [2023-08-26 13:39:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-26 13:39:06,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 13:39:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 67 flow [2023-08-26 13:39:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 13:39:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:39:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:39:06,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 392386868, now seen corresponding path program 1 times [2023-08-26 13:39:06,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021281361] [2023-08-26 13:39:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:06,309 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 13:39:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:06,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021281361] [2023-08-26 13:39:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021281361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:06,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:06,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:06,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971850196] [2023-08-26 13:39:06,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:06,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 191 [2023-08-26 13:39:06,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 13:39:06,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:06,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 191 [2023-08-26 13:39:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:06,369 INFO L124 PetriNetUnfolderBase]: 221/351 cut-off events. [2023-08-26 13:39:06,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:06,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 351 events. 221/351 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1437 event pairs, 172 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 709. Up to 343 conditions per place. [2023-08-26 13:39:06,372 INFO L140 encePairwiseOnDemand]: 188/191 looper letters, 22 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 13:39:06,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 109 flow [2023-08-26 13:39:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-08-26 13:39:06,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41535776614310643 [2023-08-26 13:39:06,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-08-26 13:39:06,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-08-26 13:39:06,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:06,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-08-26 13:39:06,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 13:39:06,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,377 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 67 flow. Second operand 3 states and 238 transitions. [2023-08-26 13:39:06,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 109 flow [2023-08-26 13:39:06,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:06,379 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 64 flow [2023-08-26 13:39:06,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-26 13:39:06,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2023-08-26 13:39:06,380 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 64 flow [2023-08-26 13:39:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 13:39:06,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:39:06,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:39:06,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash 392386870, now seen corresponding path program 1 times [2023-08-26 13:39:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936938229] [2023-08-26 13:39:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:06,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936938229] [2023-08-26 13:39:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936938229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:06,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:06,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732869636] [2023-08-26 13:39:06,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:06,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:06,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:06,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 191 [2023-08-26 13:39:06,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 13:39:06,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:06,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 191 [2023-08-26 13:39:06,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:06,497 INFO L124 PetriNetUnfolderBase]: 207/326 cut-off events. [2023-08-26 13:39:06,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:06,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 326 events. 207/326 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1290 event pairs, 159 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 660. Up to 318 conditions per place. [2023-08-26 13:39:06,501 INFO L140 encePairwiseOnDemand]: 188/191 looper letters, 20 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 13:39:06,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 102 flow [2023-08-26 13:39:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-26 13:39:06,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961605584642234 [2023-08-26 13:39:06,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-26 13:39:06,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-26 13:39:06,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:06,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-26 13:39:06,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 13:39:06,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,506 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 64 flow. Second operand 3 states and 227 transitions. [2023-08-26 13:39:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 102 flow [2023-08-26 13:39:06,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:06,508 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 61 flow [2023-08-26 13:39:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-26 13:39:06,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:39:06,510 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 61 flow [2023-08-26 13:39:06,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 13:39:06,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:06,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:39:06,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,511 INFO L85 PathProgramCache]: Analyzing trace with hash -873331410, now seen corresponding path program 1 times [2023-08-26 13:39:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072286031] [2023-08-26 13:39:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:06,554 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 13:39:06,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:06,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072286031] [2023-08-26 13:39:06,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072286031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6130028] [2023-08-26 13:39:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:06,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 191 [2023-08-26 13:39:06,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 13:39:06,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:06,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 191 [2023-08-26 13:39:06,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:06,611 INFO L124 PetriNetUnfolderBase]: 165/266 cut-off events. [2023-08-26 13:39:06,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:06,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 266 events. 165/266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1001 event pairs, 126 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 541. Up to 258 conditions per place. [2023-08-26 13:39:06,614 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 19 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:39:06,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 99 flow [2023-08-26 13:39:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 13:39:06,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083769633507853 [2023-08-26 13:39:06,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 13:39:06,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 13:39:06,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:06,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 13:39:06,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 13:39:06,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,619 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 61 flow. Second operand 3 states and 234 transitions. [2023-08-26 13:39:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 99 flow [2023-08-26 13:39:06,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:06,620 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 60 flow [2023-08-26 13:39:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 13:39:06,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:39:06,623 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 60 flow [2023-08-26 13:39:06,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 13:39:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:39:06,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -873331412, now seen corresponding path program 1 times [2023-08-26 13:39:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804589905] [2023-08-26 13:39:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:06,742 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 13:39:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:06,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804589905] [2023-08-26 13:39:06,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804589905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:06,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:39:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345269149] [2023-08-26 13:39:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:06,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:06,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 191 [2023-08-26 13:39:06,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:39:06,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:06,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 191 [2023-08-26 13:39:06,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:06,786 INFO L124 PetriNetUnfolderBase]: 123/206 cut-off events. [2023-08-26 13:39:06,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:39:06,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 206 events. 123/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 731 event pairs, 93 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 422. Up to 198 conditions per place. [2023-08-26 13:39:06,788 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 18 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 13:39:06,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 96 flow [2023-08-26 13:39:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-08-26 13:39:06,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35951134380453753 [2023-08-26 13:39:06,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-08-26 13:39:06,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-08-26 13:39:06,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:06,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-08-26 13:39:06,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 13:39:06,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:06,793 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 60 flow. Second operand 3 states and 206 transitions. [2023-08-26 13:39:06,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 96 flow [2023-08-26 13:39:06,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:06,794 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 59 flow [2023-08-26 13:39:06,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-26 13:39:06,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:39:06,795 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 59 flow [2023-08-26 13:39:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:39:06,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:06,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:39:06,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:06,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash -188088986, now seen corresponding path program 1 times [2023-08-26 13:39:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533604451] [2023-08-26 13:39:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:07,030 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 13:39:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:07,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533604451] [2023-08-26 13:39:07,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533604451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:07,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:39:07,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045236106] [2023-08-26 13:39:07,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:07,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:39:07,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:07,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:39:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:39:07,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 191 [2023-08-26 13:39:07,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 13:39:07,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:07,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 191 [2023-08-26 13:39:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:07,119 INFO L124 PetriNetUnfolderBase]: 271/426 cut-off events. [2023-08-26 13:39:07,120 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:39:07,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 426 events. 271/426 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1532 event pairs, 37 based on Foata normal form. 1/278 useless extension candidates. Maximal degree in co-relation 836. Up to 309 conditions per place. [2023-08-26 13:39:07,122 INFO L140 encePairwiseOnDemand]: 186/191 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-26 13:39:07,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 166 flow [2023-08-26 13:39:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:39:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:39:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-26 13:39:07,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340314136125655 [2023-08-26 13:39:07,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-26 13:39:07,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-26 13:39:07,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:07,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-26 13:39:07,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 13:39:07,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:07,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 13:39:07,128 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 59 flow. Second operand 3 states and 306 transitions. [2023-08-26 13:39:07,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 166 flow [2023-08-26 13:39:07,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:07,130 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 84 flow [2023-08-26 13:39:07,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-26 13:39:07,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 13:39:07,133 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 84 flow [2023-08-26 13:39:07,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 13:39:07,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:07,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:39:07,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:07,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash -100050270, now seen corresponding path program 1 times [2023-08-26 13:39:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089807530] [2023-08-26 13:39:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089807530] [2023-08-26 13:39:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089807530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:07,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:07,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:07,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075706633] [2023-08-26 13:39:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:39:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:39:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:39:07,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 191 [2023-08-26 13:39:07,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 13:39:07,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:07,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 191 [2023-08-26 13:39:07,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:07,727 INFO L124 PetriNetUnfolderBase]: 511/779 cut-off events. [2023-08-26 13:39:07,727 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-08-26 13:39:07,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 779 events. 511/779 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2839 event pairs, 30 based on Foata normal form. 44/823 useless extension candidates. Maximal degree in co-relation 1829. Up to 279 conditions per place. [2023-08-26 13:39:07,732 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 79 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2023-08-26 13:39:07,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 98 transitions, 467 flow [2023-08-26 13:39:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:39:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:39:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 827 transitions. [2023-08-26 13:39:07,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810936591041303 [2023-08-26 13:39:07,735 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 827 transitions. [2023-08-26 13:39:07,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 827 transitions. [2023-08-26 13:39:07,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:07,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 827 transitions. [2023-08-26 13:39:07,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.88888888888889) internal successors, (827), 9 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 13:39:07,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 13:39:07,739 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 13:39:07,739 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 84 flow. Second operand 9 states and 827 transitions. [2023-08-26 13:39:07,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 98 transitions, 467 flow [2023-08-26 13:39:07,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 98 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:07,741 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 219 flow [2023-08-26 13:39:07,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=219, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-26 13:39:07,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-08-26 13:39:07,742 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 219 flow [2023-08-26 13:39:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 13:39:07,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:07,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:07,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:39:07,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:07,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1229171866, now seen corresponding path program 2 times [2023-08-26 13:39:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:07,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086816559] [2023-08-26 13:39:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:07,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:07,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086816559] [2023-08-26 13:39:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086816559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:07,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:07,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:39:07,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676351281] [2023-08-26 13:39:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:07,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:07,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:07,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 191 [2023-08-26 13:39:07,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 13:39:07,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:07,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 191 [2023-08-26 13:39:07,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:08,200 INFO L124 PetriNetUnfolderBase]: 801/1227 cut-off events. [2023-08-26 13:39:08,200 INFO L125 PetriNetUnfolderBase]: For 1576/1576 co-relation queries the response was YES. [2023-08-26 13:39:08,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 1227 events. 801/1227 cut-off events. For 1576/1576 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5019 event pairs, 40 based on Foata normal form. 24/1251 useless extension candidates. Maximal degree in co-relation 3880. Up to 429 conditions per place. [2023-08-26 13:39:08,210 INFO L140 encePairwiseOnDemand]: 183/191 looper letters, 80 selfloop transitions, 15 changer transitions 3/98 dead transitions. [2023-08-26 13:39:08,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 98 transitions, 600 flow [2023-08-26 13:39:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 575 transitions. [2023-08-26 13:39:08,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017452006980803 [2023-08-26 13:39:08,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 575 transitions. [2023-08-26 13:39:08,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 575 transitions. [2023-08-26 13:39:08,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:08,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 575 transitions. [2023-08-26 13:39:08,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.83333333333333) internal successors, (575), 6 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 13:39:08,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:08,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:08,217 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 219 flow. Second operand 6 states and 575 transitions. [2023-08-26 13:39:08,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 98 transitions, 600 flow [2023-08-26 13:39:08,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 98 transitions, 596 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-26 13:39:08,228 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 290 flow [2023-08-26 13:39:08,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-26 13:39:08,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-26 13:39:08,229 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 290 flow [2023-08-26 13:39:08,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 13:39:08,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:08,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:39:08,232 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:08,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -506126010, now seen corresponding path program 3 times [2023-08-26 13:39:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307263864] [2023-08-26 13:39:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307263864] [2023-08-26 13:39:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307263864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:08,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:39:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970012026] [2023-08-26 13:39:08,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:08,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:08,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:08,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:08,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 191 [2023-08-26 13:39:08,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 13:39:08,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:08,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 191 [2023-08-26 13:39:08,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:08,710 INFO L124 PetriNetUnfolderBase]: 951/1445 cut-off events. [2023-08-26 13:39:08,711 INFO L125 PetriNetUnfolderBase]: For 3670/3670 co-relation queries the response was YES. [2023-08-26 13:39:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 1445 events. 951/1445 cut-off events. For 3670/3670 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5999 event pairs, 173 based on Foata normal form. 36/1481 useless extension candidates. Maximal degree in co-relation 5286. Up to 1033 conditions per place. [2023-08-26 13:39:08,722 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 64 selfloop transitions, 18 changer transitions 3/85 dead transitions. [2023-08-26 13:39:08,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 643 flow [2023-08-26 13:39:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 553 transitions. [2023-08-26 13:39:08,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825479930191972 [2023-08-26 13:39:08,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 553 transitions. [2023-08-26 13:39:08,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 553 transitions. [2023-08-26 13:39:08,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:08,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 553 transitions. [2023-08-26 13:39:08,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.16666666666667) internal successors, (553), 6 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 13:39:08,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:08,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:08,729 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 290 flow. Second operand 6 states and 553 transitions. [2023-08-26 13:39:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 643 flow [2023-08-26 13:39:08,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 625 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 13:39:08,738 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 397 flow [2023-08-26 13:39:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-26 13:39:08,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2023-08-26 13:39:08,739 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 397 flow [2023-08-26 13:39:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 13:39:08,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:08,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:08,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:39:08,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:08,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1206512810, now seen corresponding path program 1 times [2023-08-26 13:39:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:08,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817250841] [2023-08-26 13:39:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817250841] [2023-08-26 13:39:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817250841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:09,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:09,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217263704] [2023-08-26 13:39:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:39:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:39:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:39:09,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:39:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 13:39:09,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:09,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:39:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:09,521 INFO L124 PetriNetUnfolderBase]: 1253/1922 cut-off events. [2023-08-26 13:39:09,521 INFO L125 PetriNetUnfolderBase]: For 7079/7079 co-relation queries the response was YES. [2023-08-26 13:39:09,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7909 conditions, 1922 events. 1253/1922 cut-off events. For 7079/7079 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8781 event pairs, 217 based on Foata normal form. 76/1998 useless extension candidates. Maximal degree in co-relation 7891. Up to 1278 conditions per place. [2023-08-26 13:39:09,537 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 88 selfloop transitions, 17 changer transitions 6/111 dead transitions. [2023-08-26 13:39:09,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 889 flow [2023-08-26 13:39:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-26 13:39:09,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860383944153578 [2023-08-26 13:39:09,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-26 13:39:09,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-26 13:39:09,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:09,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-26 13:39:09,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:09,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:09,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:09,543 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 397 flow. Second operand 6 states and 557 transitions. [2023-08-26 13:39:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 889 flow [2023-08-26 13:39:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 111 transitions, 847 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 13:39:09,572 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 489 flow [2023-08-26 13:39:09,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=489, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-26 13:39:09,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2023-08-26 13:39:09,573 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 489 flow [2023-08-26 13:39:09,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 13:39:09,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:09,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:09,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:39:09,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:09,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:09,574 INFO L85 PathProgramCache]: Analyzing trace with hash -45868466, now seen corresponding path program 1 times [2023-08-26 13:39:09,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:09,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485509640] [2023-08-26 13:39:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:09,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:09,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485509640] [2023-08-26 13:39:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485509640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576556690] [2023-08-26 13:39:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:09,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2023-08-26 13:39:09,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 489 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2023-08-26 13:39:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:10,181 INFO L124 PetriNetUnfolderBase]: 1662/2559 cut-off events. [2023-08-26 13:39:10,181 INFO L125 PetriNetUnfolderBase]: For 12998/12998 co-relation queries the response was YES. [2023-08-26 13:39:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11349 conditions, 2559 events. 1662/2559 cut-off events. For 12998/12998 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12658 event pairs, 302 based on Foata normal form. 34/2593 useless extension candidates. Maximal degree in co-relation 11329. Up to 1162 conditions per place. [2023-08-26 13:39:10,202 INFO L140 encePairwiseOnDemand]: 183/191 looper letters, 114 selfloop transitions, 59 changer transitions 9/182 dead transitions. [2023-08-26 13:39:10,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 182 transitions, 1788 flow [2023-08-26 13:39:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 573 transitions. [2023-08-26 13:39:10,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 13:39:10,205 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 573 transitions. [2023-08-26 13:39:10,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 573 transitions. [2023-08-26 13:39:10,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:10,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 573 transitions. [2023-08-26 13:39:10,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.5) internal successors, (573), 6 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 13:39:10,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:10,208 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:10,208 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 489 flow. Second operand 6 states and 573 transitions. [2023-08-26 13:39:10,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 182 transitions, 1788 flow [2023-08-26 13:39:10,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 182 transitions, 1759 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:10,247 INFO L231 Difference]: Finished difference. Result has 73 places, 111 transitions, 1170 flow [2023-08-26 13:39:10,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1170, PETRI_PLACES=73, PETRI_TRANSITIONS=111} [2023-08-26 13:39:10,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-08-26 13:39:10,248 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 111 transitions, 1170 flow [2023-08-26 13:39:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:10,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:10,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:39:10,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:10,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 711573708, now seen corresponding path program 2 times [2023-08-26 13:39:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703658126] [2023-08-26 13:39:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703658126] [2023-08-26 13:39:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703658126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559675472] [2023-08-26 13:39:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:10,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:10,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2023-08-26 13:39:10,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 111 transitions, 1170 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:10,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:10,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2023-08-26 13:39:10,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:10,904 INFO L124 PetriNetUnfolderBase]: 1928/3054 cut-off events. [2023-08-26 13:39:10,904 INFO L125 PetriNetUnfolderBase]: For 18803/18803 co-relation queries the response was YES. [2023-08-26 13:39:10,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15590 conditions, 3054 events. 1928/3054 cut-off events. For 18803/18803 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15994 event pairs, 498 based on Foata normal form. 44/3098 useless extension candidates. Maximal degree in co-relation 15567. Up to 1598 conditions per place. [2023-08-26 13:39:10,937 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 85 selfloop transitions, 78 changer transitions 2/165 dead transitions. [2023-08-26 13:39:10,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1854 flow [2023-08-26 13:39:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:39:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:39:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 481 transitions. [2023-08-26 13:39:10,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036649214659686 [2023-08-26 13:39:10,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 481 transitions. [2023-08-26 13:39:10,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 481 transitions. [2023-08-26 13:39:10,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:10,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 481 transitions. [2023-08-26 13:39:10,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.2) internal successors, (481), 5 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 13:39:10,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:10,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:10,943 INFO L175 Difference]: Start difference. First operand has 73 places, 111 transitions, 1170 flow. Second operand 5 states and 481 transitions. [2023-08-26 13:39:10,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1854 flow [2023-08-26 13:39:10,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 165 transitions, 1852 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 13:39:10,989 INFO L231 Difference]: Finished difference. Result has 80 places, 120 transitions, 1545 flow [2023-08-26 13:39:10,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1545, PETRI_PLACES=80, PETRI_TRANSITIONS=120} [2023-08-26 13:39:10,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2023-08-26 13:39:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 120 transitions, 1545 flow [2023-08-26 13:39:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:10,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:10,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:39:10,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:10,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 670146666, now seen corresponding path program 3 times [2023-08-26 13:39:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102707811] [2023-08-26 13:39:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:11,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:11,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102707811] [2023-08-26 13:39:11,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102707811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:11,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:11,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:11,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605339120] [2023-08-26 13:39:11,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:11,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:11,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:11,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:11,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:11,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2023-08-26 13:39:11,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 120 transitions, 1545 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:11,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:11,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2023-08-26 13:39:11,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:11,674 INFO L124 PetriNetUnfolderBase]: 1924/3061 cut-off events. [2023-08-26 13:39:11,674 INFO L125 PetriNetUnfolderBase]: For 25910/25910 co-relation queries the response was YES. [2023-08-26 13:39:11,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17268 conditions, 3061 events. 1924/3061 cut-off events. For 25910/25910 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15984 event pairs, 555 based on Foata normal form. 34/3095 useless extension candidates. Maximal degree in co-relation 17241. Up to 1760 conditions per place. [2023-08-26 13:39:11,698 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 85 selfloop transitions, 80 changer transitions 4/169 dead transitions. [2023-08-26 13:39:11,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 169 transitions, 2141 flow [2023-08-26 13:39:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:39:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:39:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 485 transitions. [2023-08-26 13:39:11,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078534031413613 [2023-08-26 13:39:11,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 485 transitions. [2023-08-26 13:39:11,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 485 transitions. [2023-08-26 13:39:11,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:11,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 485 transitions. [2023-08-26 13:39:11,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:11,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:11,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:11,703 INFO L175 Difference]: Start difference. First operand has 80 places, 120 transitions, 1545 flow. Second operand 5 states and 485 transitions. [2023-08-26 13:39:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 169 transitions, 2141 flow [2023-08-26 13:39:11,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 169 transitions, 2048 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:11,784 INFO L231 Difference]: Finished difference. Result has 86 places, 122 transitions, 1735 flow [2023-08-26 13:39:11,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1735, PETRI_PLACES=86, PETRI_TRANSITIONS=122} [2023-08-26 13:39:11,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-26 13:39:11,785 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 122 transitions, 1735 flow [2023-08-26 13:39:11,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:11,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:11,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:11,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:39:11,786 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:11,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash 46234186, now seen corresponding path program 4 times [2023-08-26 13:39:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:11,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479210604] [2023-08-26 13:39:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:11,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:11,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479210604] [2023-08-26 13:39:12,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479210604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699881829] [2023-08-26 13:39:12,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:39:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:12,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:12,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:39:12,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:39:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:39:12,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 13:39:12,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:12,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 13:39:12,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699881829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:12,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 13:39:12,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-08-26 13:39:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507519330] [2023-08-26 13:39:12,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:39:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:39:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:39:12,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:39:12,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 122 transitions, 1735 flow. Second operand has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 13:39:12,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:12,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:39:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:12,671 INFO L124 PetriNetUnfolderBase]: 1929/3105 cut-off events. [2023-08-26 13:39:12,671 INFO L125 PetriNetUnfolderBase]: For 26659/26659 co-relation queries the response was YES. [2023-08-26 13:39:12,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18170 conditions, 3105 events. 1929/3105 cut-off events. For 26659/26659 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16389 event pairs, 417 based on Foata normal form. 14/3119 useless extension candidates. Maximal degree in co-relation 18140. Up to 2851 conditions per place. [2023-08-26 13:39:12,697 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 130 selfloop transitions, 22 changer transitions 14/166 dead transitions. [2023-08-26 13:39:12,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 2408 flow [2023-08-26 13:39:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 541 transitions. [2023-08-26 13:39:12,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720767888307155 [2023-08-26 13:39:12,699 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 541 transitions. [2023-08-26 13:39:12,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 541 transitions. [2023-08-26 13:39:12,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:12,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 541 transitions. [2023-08-26 13:39:12,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 13:39:12,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:12,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:12,703 INFO L175 Difference]: Start difference. First operand has 86 places, 122 transitions, 1735 flow. Second operand 6 states and 541 transitions. [2023-08-26 13:39:12,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 2408 flow [2023-08-26 13:39:12,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 166 transitions, 2320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:12,790 INFO L231 Difference]: Finished difference. Result has 93 places, 125 transitions, 1783 flow [2023-08-26 13:39:12,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1783, PETRI_PLACES=93, PETRI_TRANSITIONS=125} [2023-08-26 13:39:12,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2023-08-26 13:39:12,792 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 125 transitions, 1783 flow [2023-08-26 13:39:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 13:39:12,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:12,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:12,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 13:39:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:39:12,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:12,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash 667520890, now seen corresponding path program 5 times [2023-08-26 13:39:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441855553] [2023-08-26 13:39:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441855553] [2023-08-26 13:39:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441855553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:13,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004262533] [2023-08-26 13:39:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:13,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2023-08-26 13:39:13,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 125 transitions, 1783 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:13,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:13,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2023-08-26 13:39:13,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:13,763 INFO L124 PetriNetUnfolderBase]: 2239/3530 cut-off events. [2023-08-26 13:39:13,763 INFO L125 PetriNetUnfolderBase]: For 32209/32209 co-relation queries the response was YES. [2023-08-26 13:39:13,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21085 conditions, 3530 events. 2239/3530 cut-off events. For 32209/32209 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18922 event pairs, 544 based on Foata normal form. 66/3596 useless extension candidates. Maximal degree in co-relation 21052. Up to 1355 conditions per place. [2023-08-26 13:39:13,791 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 91 selfloop transitions, 93 changer transitions 5/189 dead transitions. [2023-08-26 13:39:13,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 189 transitions, 2684 flow [2023-08-26 13:39:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:39:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:39:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2023-08-26 13:39:13,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089005235602094 [2023-08-26 13:39:13,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2023-08-26 13:39:13,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2023-08-26 13:39:13,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:13,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2023-08-26 13:39:13,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.2) internal successors, (486), 5 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 13:39:13,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:13,796 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:13,796 INFO L175 Difference]: Start difference. First operand has 93 places, 125 transitions, 1783 flow. Second operand 5 states and 486 transitions. [2023-08-26 13:39:13,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 189 transitions, 2684 flow [2023-08-26 13:39:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 189 transitions, 2648 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 13:39:13,931 INFO L231 Difference]: Finished difference. Result has 96 places, 137 transitions, 2130 flow [2023-08-26 13:39:13,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2130, PETRI_PLACES=96, PETRI_TRANSITIONS=137} [2023-08-26 13:39:13,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2023-08-26 13:39:13,931 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 137 transitions, 2130 flow [2023-08-26 13:39:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:13,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:13,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:13,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 13:39:13,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:13,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash 836962336, now seen corresponding path program 6 times [2023-08-26 13:39:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403476467] [2023-08-26 13:39:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403476467] [2023-08-26 13:39:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403476467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737051619] [2023-08-26 13:39:14,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:39:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:14,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:14,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:14,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:39:14,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:39:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:39:14,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:39:14,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:14,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:39:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:14,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737051619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:39:14,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:39:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-26 13:39:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955333227] [2023-08-26 13:39:14,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:39:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:39:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:39:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:39:14,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-26 13:39:14,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 137 transitions, 2130 flow. Second operand has 11 states, 11 states have (on average 83.45454545454545) internal successors, (918), 11 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 13:39:14,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:14,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-26 13:39:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:15,696 INFO L124 PetriNetUnfolderBase]: 4321/6817 cut-off events. [2023-08-26 13:39:15,697 INFO L125 PetriNetUnfolderBase]: For 67101/67101 co-relation queries the response was YES. [2023-08-26 13:39:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41653 conditions, 6817 events. 4321/6817 cut-off events. For 67101/67101 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 40519 event pairs, 402 based on Foata normal form. 235/7052 useless extension candidates. Maximal degree in co-relation 41619. Up to 3045 conditions per place. [2023-08-26 13:39:15,764 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 279 selfloop transitions, 61 changer transitions 20/360 dead transitions. [2023-08-26 13:39:15,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 360 transitions, 5760 flow [2023-08-26 13:39:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:39:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:39:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 742 transitions. [2023-08-26 13:39:15,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4856020942408377 [2023-08-26 13:39:15,766 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 742 transitions. [2023-08-26 13:39:15,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 742 transitions. [2023-08-26 13:39:15,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:15,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 742 transitions. [2023-08-26 13:39:15,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.75) internal successors, (742), 8 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 13:39:15,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 191.0) internal successors, (1719), 9 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states 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 13:39:15,771 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 191.0) internal successors, (1719), 9 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states 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 13:39:15,771 INFO L175 Difference]: Start difference. First operand has 96 places, 137 transitions, 2130 flow. Second operand 8 states and 742 transitions. [2023-08-26 13:39:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 360 transitions, 5760 flow [2023-08-26 13:39:16,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 360 transitions, 5505 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 13:39:16,096 INFO L231 Difference]: Finished difference. Result has 105 places, 188 transitions, 3112 flow [2023-08-26 13:39:16,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3112, PETRI_PLACES=105, PETRI_TRANSITIONS=188} [2023-08-26 13:39:16,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2023-08-26 13:39:16,097 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 188 transitions, 3112 flow [2023-08-26 13:39:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 83.45454545454545) internal successors, (918), 11 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 13:39:16,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:16,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:16,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:39:16,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 13:39:16,303 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:16,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:16,303 INFO L85 PathProgramCache]: Analyzing trace with hash 497216458, now seen corresponding path program 7 times [2023-08-26 13:39:16,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:16,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275213876] [2023-08-26 13:39:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:16,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:16,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:16,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275213876] [2023-08-26 13:39:16,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275213876] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:16,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:16,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:39:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146474002] [2023-08-26 13:39:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:16,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:16,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:16,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2023-08-26 13:39:16,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 188 transitions, 3112 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:16,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:16,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2023-08-26 13:39:16,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:17,769 INFO L124 PetriNetUnfolderBase]: 5253/8222 cut-off events. [2023-08-26 13:39:17,770 INFO L125 PetriNetUnfolderBase]: For 99567/99567 co-relation queries the response was YES. [2023-08-26 13:39:17,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54877 conditions, 8222 events. 5253/8222 cut-off events. For 99567/99567 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 50833 event pairs, 880 based on Foata normal form. 132/8354 useless extension candidates. Maximal degree in co-relation 54838. Up to 3144 conditions per place. [2023-08-26 13:39:17,854 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 175 selfloop transitions, 151 changer transitions 7/333 dead transitions. [2023-08-26 13:39:17,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 333 transitions, 5620 flow [2023-08-26 13:39:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-08-26 13:39:17,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008726003490401 [2023-08-26 13:39:17,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-08-26 13:39:17,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-08-26 13:39:17,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:17,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-08-26 13:39:17,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 13:39:17,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:17,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:17,862 INFO L175 Difference]: Start difference. First operand has 105 places, 188 transitions, 3112 flow. Second operand 6 states and 574 transitions. [2023-08-26 13:39:17,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 333 transitions, 5620 flow [2023-08-26 13:39:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 333 transitions, 5448 flow, removed 86 selfloop flow, removed 0 redundant places. [2023-08-26 13:39:18,313 INFO L231 Difference]: Finished difference. Result has 113 places, 238 transitions, 4294 flow [2023-08-26 13:39:18,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4294, PETRI_PLACES=113, PETRI_TRANSITIONS=238} [2023-08-26 13:39:18,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2023-08-26 13:39:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 238 transitions, 4294 flow [2023-08-26 13:39:18,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:39:18,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:18,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:39:18,314 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:18,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1640812268, now seen corresponding path program 8 times [2023-08-26 13:39:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:18,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088348948] [2023-08-26 13:39:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:18,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088348948] [2023-08-26 13:39:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088348948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:18,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:39:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405061656] [2023-08-26 13:39:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:18,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 191 [2023-08-26 13:39:18,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 238 transitions, 4294 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 13:39:18,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:18,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 191 [2023-08-26 13:39:18,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:19,596 INFO L124 PetriNetUnfolderBase]: 5209/8118 cut-off events. [2023-08-26 13:39:19,596 INFO L125 PetriNetUnfolderBase]: For 103985/103985 co-relation queries the response was YES. [2023-08-26 13:39:19,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56761 conditions, 8118 events. 5209/8118 cut-off events. For 103985/103985 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48551 event pairs, 1037 based on Foata normal form. 8/8126 useless extension candidates. Maximal degree in co-relation 56718. Up to 7953 conditions per place. [2023-08-26 13:39:19,719 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 247 selfloop transitions, 18 changer transitions 2/267 dead transitions. [2023-08-26 13:39:19,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 267 transitions, 5033 flow [2023-08-26 13:39:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:39:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:39:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-08-26 13:39:19,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816753926701571 [2023-08-26 13:39:19,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-08-26 13:39:19,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-08-26 13:39:19,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:19,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-08-26 13:39:19,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 13:39:19,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:19,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 13:39:19,726 INFO L175 Difference]: Start difference. First operand has 113 places, 238 transitions, 4294 flow. Second operand 5 states and 460 transitions. [2023-08-26 13:39:19,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 267 transitions, 5033 flow [2023-08-26 13:39:20,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 267 transitions, 4884 flow, removed 55 selfloop flow, removed 5 redundant places. [2023-08-26 13:39:20,059 INFO L231 Difference]: Finished difference. Result has 112 places, 241 transitions, 4249 flow [2023-08-26 13:39:20,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4249, PETRI_PLACES=112, PETRI_TRANSITIONS=241} [2023-08-26 13:39:20,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2023-08-26 13:39:20,059 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 241 transitions, 4249 flow [2023-08-26 13:39:20,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 13:39:20,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:20,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:20,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 13:39:20,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:20,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash -680971224, now seen corresponding path program 9 times [2023-08-26 13:39:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:20,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435527377] [2023-08-26 13:39:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:20,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435527377] [2023-08-26 13:39:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435527377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:39:20,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:39:20,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:39:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852951703] [2023-08-26 13:39:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:39:20,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:39:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:39:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:39:20,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 191 [2023-08-26 13:39:20,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 241 transitions, 4249 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 13:39:20,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:20,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 191 [2023-08-26 13:39:20,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:21,439 INFO L124 PetriNetUnfolderBase]: 5270/8201 cut-off events. [2023-08-26 13:39:21,439 INFO L125 PetriNetUnfolderBase]: For 97303/97303 co-relation queries the response was YES. [2023-08-26 13:39:21,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56088 conditions, 8201 events. 5270/8201 cut-off events. For 97303/97303 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 49067 event pairs, 1030 based on Foata normal form. 2/8203 useless extension candidates. Maximal degree in co-relation 56045. Up to 7895 conditions per place. [2023-08-26 13:39:21,502 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 261 selfloop transitions, 21 changer transitions 4/286 dead transitions. [2023-08-26 13:39:21,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 286 transitions, 5236 flow [2023-08-26 13:39:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:39:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:39:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2023-08-26 13:39:21,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816753926701571 [2023-08-26 13:39:21,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2023-08-26 13:39:21,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2023-08-26 13:39:21,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:21,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2023-08-26 13:39:21,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 13:39:21,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:21,508 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 13:39:21,508 INFO L175 Difference]: Start difference. First operand has 112 places, 241 transitions, 4249 flow. Second operand 6 states and 552 transitions. [2023-08-26 13:39:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 286 transitions, 5236 flow [2023-08-26 13:39:21,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 286 transitions, 5085 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-26 13:39:21,798 INFO L231 Difference]: Finished difference. Result has 110 places, 238 transitions, 4091 flow [2023-08-26 13:39:21,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4091, PETRI_PLACES=110, PETRI_TRANSITIONS=238} [2023-08-26 13:39:21,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2023-08-26 13:39:21,798 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 238 transitions, 4091 flow [2023-08-26 13:39:21,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 13:39:21,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:21,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:21,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 13:39:21,799 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:21,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1018244012, now seen corresponding path program 1 times [2023-08-26 13:39:21,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:21,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020138953] [2023-08-26 13:39:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020138953] [2023-08-26 13:39:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020138953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437264765] [2023-08-26 13:39:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:22,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:22,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:22,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:39:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:22,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:39:22,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:22,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:39:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437264765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:39:22,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:39:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-26 13:39:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057241284] [2023-08-26 13:39:22,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:39:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:39:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:39:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:39:22,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-26 13:39:22,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 238 transitions, 4091 flow. Second operand has 10 states, 10 states have (on average 83.5) internal successors, (835), 10 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:22,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:22,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-26 13:39:22,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:24,476 INFO L124 PetriNetUnfolderBase]: 6888/11197 cut-off events. [2023-08-26 13:39:24,476 INFO L125 PetriNetUnfolderBase]: For 122651/122651 co-relation queries the response was YES. [2023-08-26 13:39:24,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75048 conditions, 11197 events. 6888/11197 cut-off events. For 122651/122651 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 75683 event pairs, 621 based on Foata normal form. 10/11207 useless extension candidates. Maximal degree in co-relation 75006. Up to 6965 conditions per place. [2023-08-26 13:39:24,551 INFO L140 encePairwiseOnDemand]: 185/191 looper letters, 435 selfloop transitions, 160 changer transitions 6/601 dead transitions. [2023-08-26 13:39:24,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 601 transitions, 11070 flow [2023-08-26 13:39:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:39:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:39:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 822 transitions. [2023-08-26 13:39:24,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781849912739965 [2023-08-26 13:39:24,559 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 822 transitions. [2023-08-26 13:39:24,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 822 transitions. [2023-08-26 13:39:24,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:24,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 822 transitions. [2023-08-26 13:39:24,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.33333333333333) internal successors, (822), 9 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 13:39:24,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 13:39:24,566 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 13:39:24,566 INFO L175 Difference]: Start difference. First operand has 110 places, 238 transitions, 4091 flow. Second operand 9 states and 822 transitions. [2023-08-26 13:39:24,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 601 transitions, 11070 flow [2023-08-26 13:39:24,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 601 transitions, 11027 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 13:39:24,875 INFO L231 Difference]: Finished difference. Result has 116 places, 351 transitions, 6912 flow [2023-08-26 13:39:24,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6912, PETRI_PLACES=116, PETRI_TRANSITIONS=351} [2023-08-26 13:39:24,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2023-08-26 13:39:24,875 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 351 transitions, 6912 flow [2023-08-26 13:39:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.5) internal successors, (835), 10 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:39:24,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:24,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:39:25,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:25,077 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:25,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -373341098, now seen corresponding path program 2 times [2023-08-26 13:39:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:25,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933794606] [2023-08-26 13:39:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933794606] [2023-08-26 13:39:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933794606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037763312] [2023-08-26 13:39:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:39:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:25,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:25,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:39:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:39:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:39:25,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:39:25,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:25,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:39:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037763312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:39:26,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:39:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-26 13:39:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808712748] [2023-08-26 13:39:26,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:39:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:39:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:39:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:39:26,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 191 [2023-08-26 13:39:26,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 351 transitions, 6912 flow. Second operand has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 13:39:26,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:26,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 191 [2023-08-26 13:39:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:28,609 INFO L124 PetriNetUnfolderBase]: 7677/12526 cut-off events. [2023-08-26 13:39:28,610 INFO L125 PetriNetUnfolderBase]: For 164344/164344 co-relation queries the response was YES. [2023-08-26 13:39:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88964 conditions, 12526 events. 7677/12526 cut-off events. For 164344/164344 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 87330 event pairs, 798 based on Foata normal form. 18/12544 useless extension candidates. Maximal degree in co-relation 88919. Up to 9497 conditions per place. [2023-08-26 13:39:28,690 INFO L140 encePairwiseOnDemand]: 184/191 looper letters, 404 selfloop transitions, 170 changer transitions 7/581 dead transitions. [2023-08-26 13:39:28,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 581 transitions, 11824 flow [2023-08-26 13:39:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:39:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:39:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 946 transitions. [2023-08-26 13:39:28,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450261780104712 [2023-08-26 13:39:28,694 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 946 transitions. [2023-08-26 13:39:28,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 946 transitions. [2023-08-26 13:39:28,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:28,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 946 transitions. [2023-08-26 13:39:28,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.0) internal successors, (946), 11 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 13:39:28,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 191.0) internal successors, (2292), 12 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states 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 13:39:28,699 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 191.0) internal successors, (2292), 12 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states 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 13:39:28,699 INFO L175 Difference]: Start difference. First operand has 116 places, 351 transitions, 6912 flow. Second operand 11 states and 946 transitions. [2023-08-26 13:39:28,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 581 transitions, 11824 flow [2023-08-26 13:39:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 581 transitions, 11367 flow, removed 220 selfloop flow, removed 1 redundant places. [2023-08-26 13:39:29,291 INFO L231 Difference]: Finished difference. Result has 130 places, 431 transitions, 8772 flow [2023-08-26 13:39:29,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8772, PETRI_PLACES=130, PETRI_TRANSITIONS=431} [2023-08-26 13:39:29,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2023-08-26 13:39:29,292 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 431 transitions, 8772 flow [2023-08-26 13:39:29,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 13:39:29,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:29,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:29,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 13:39:29,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:29,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:29,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1263700006, now seen corresponding path program 1 times [2023-08-26 13:39:29,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:29,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108191605] [2023-08-26 13:39:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:29,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:29,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108191605] [2023-08-26 13:39:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108191605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342473825] [2023-08-26 13:39:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:29,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:29,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:39:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:29,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:39:29,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:29,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:39:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:30,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342473825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:39:30,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:39:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2023-08-26 13:39:30,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418438567] [2023-08-26 13:39:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:39:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:39:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:39:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:39:30,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:39:30,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 431 transitions, 8772 flow. Second operand has 15 states, 15 states have (on average 81.6) internal successors, (1224), 15 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 13:39:30,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:30,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:39:30,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:35,503 INFO L124 PetriNetUnfolderBase]: 11018/17883 cut-off events. [2023-08-26 13:39:35,504 INFO L125 PetriNetUnfolderBase]: For 261817/261817 co-relation queries the response was YES. [2023-08-26 13:39:35,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130147 conditions, 17883 events. 11018/17883 cut-off events. For 261817/261817 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 131061 event pairs, 199 based on Foata normal form. 222/18105 useless extension candidates. Maximal degree in co-relation 130096. Up to 3833 conditions per place. [2023-08-26 13:39:35,747 INFO L140 encePairwiseOnDemand]: 180/191 looper letters, 463 selfloop transitions, 1075 changer transitions 1/1539 dead transitions. [2023-08-26 13:39:35,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1539 transitions, 28983 flow [2023-08-26 13:39:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-26 13:39:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-26 13:39:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4696 transitions. [2023-08-26 13:39:35,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638941025387731 [2023-08-26 13:39:35,754 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4696 transitions. [2023-08-26 13:39:35,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4696 transitions. [2023-08-26 13:39:35,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:35,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4696 transitions. [2023-08-26 13:39:35,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 88.60377358490567) internal successors, (4696), 53 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states 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 13:39:35,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 191.0) internal successors, (10314), 54 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states 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 13:39:35,775 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 191.0) internal successors, (10314), 54 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states 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 13:39:35,775 INFO L175 Difference]: Start difference. First operand has 130 places, 431 transitions, 8772 flow. Second operand 53 states and 4696 transitions. [2023-08-26 13:39:35,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1539 transitions, 28983 flow [2023-08-26 13:39:37,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1539 transitions, 28256 flow, removed 352 selfloop flow, removed 2 redundant places. [2023-08-26 13:39:37,026 INFO L231 Difference]: Finished difference. Result has 209 places, 1246 transitions, 27023 flow [2023-08-26 13:39:37,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=8468, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=27023, PETRI_PLACES=209, PETRI_TRANSITIONS=1246} [2023-08-26 13:39:37,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2023-08-26 13:39:37,027 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 1246 transitions, 27023 flow [2023-08-26 13:39:37,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.6) internal successors, (1224), 15 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 13:39:37,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:39:37,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:39:37,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 13:39:37,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 13:39:37,229 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:39:37,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:39:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 639005382, now seen corresponding path program 2 times [2023-08-26 13:39:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:39:37,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187120654] [2023-08-26 13:39:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:39:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:39:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:39:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:37,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:39:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187120654] [2023-08-26 13:39:37,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187120654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:39:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275611005] [2023-08-26 13:39:37,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:39:37,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:39:37,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:39:37,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:39:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:39:37,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:39:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:39:37,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:39:37,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:39:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:37,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:39:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:39:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275611005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:39:38,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:39:38,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 19 [2023-08-26 13:39:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790946161] [2023-08-26 13:39:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:39:38,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:39:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:39:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:39:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:39:38,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:39:38,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 1246 transitions, 27023 flow. Second operand has 20 states, 20 states have (on average 81.25) internal successors, (1625), 20 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states 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 13:39:38,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:39:38,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:39:38,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:39:52,157 INFO L124 PetriNetUnfolderBase]: 20183/32845 cut-off events. [2023-08-26 13:39:52,158 INFO L125 PetriNetUnfolderBase]: For 731862/731862 co-relation queries the response was YES. [2023-08-26 13:39:52,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282079 conditions, 32845 events. 20183/32845 cut-off events. For 731862/731862 co-relation queries the response was YES. Maximal size of possible extension queue 1832. Compared 261354 event pairs, 225 based on Foata normal form. 868/33713 useless extension candidates. Maximal degree in co-relation 281998. Up to 7007 conditions per place. [2023-08-26 13:39:52,608 INFO L140 encePairwiseOnDemand]: 179/191 looper letters, 1171 selfloop transitions, 2521 changer transitions 10/3702 dead transitions. [2023-08-26 13:39:52,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 3702 transitions, 80323 flow [2023-08-26 13:39:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-26 13:39:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-26 13:39:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6772 transitions. [2023-08-26 13:39:52,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46651970239735463 [2023-08-26 13:39:52,618 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6772 transitions. [2023-08-26 13:39:52,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6772 transitions. [2023-08-26 13:39:52,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:39:52,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6772 transitions. [2023-08-26 13:39:52,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 89.10526315789474) internal successors, (6772), 76 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states 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 13:39:52,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 191.0) internal successors, (14707), 77 states have internal predecessors, (14707), 0 states have call successors, (0), 0 states 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 13:39:52,647 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 191.0) internal successors, (14707), 77 states have internal predecessors, (14707), 0 states have call successors, (0), 0 states 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 13:39:52,647 INFO L175 Difference]: Start difference. First operand has 209 places, 1246 transitions, 27023 flow. Second operand 76 states and 6772 transitions. [2023-08-26 13:39:52,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 3702 transitions, 80323 flow [2023-08-26 13:40:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3702 transitions, 76427 flow, removed 1933 selfloop flow, removed 3 redundant places. [2023-08-26 13:40:07,307 INFO L231 Difference]: Finished difference. Result has 330 places, 2962 transitions, 69038 flow [2023-08-26 13:40:07,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=24618, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=961, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=69038, PETRI_PLACES=330, PETRI_TRANSITIONS=2962} [2023-08-26 13:40:07,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2023-08-26 13:40:07,308 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 2962 transitions, 69038 flow [2023-08-26 13:40:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.25) internal successors, (1625), 20 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states 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 13:40:07,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:40:07,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:40:07,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 13:40:07,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:40:07,510 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:40:07,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:40:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1858243554, now seen corresponding path program 3 times [2023-08-26 13:40:07,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:40:07,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889667980] [2023-08-26 13:40:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:40:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:40:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:40:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:40:07,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:40:07,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889667980] [2023-08-26 13:40:07,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889667980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:40:07,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399497770] [2023-08-26 13:40:07,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:40:07,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:40:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:40:07,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:40:07,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:40:07,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:40:07,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:40:07,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:40:07,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:40:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:40:07,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:40:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:40:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399497770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:40:07,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:40:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 15 [2023-08-26 13:40:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994845225] [2023-08-26 13:40:07,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:40:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:40:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:40:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:40:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:40:07,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:40:07,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 2962 transitions, 69038 flow. Second operand has 16 states, 16 states have (on average 81.5) internal successors, (1304), 16 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states 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 13:40:07,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:40:07,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:40:07,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:40:44,447 INFO L124 PetriNetUnfolderBase]: 34098/55687 cut-off events. [2023-08-26 13:40:44,447 INFO L125 PetriNetUnfolderBase]: For 1617328/1617328 co-relation queries the response was YES. [2023-08-26 13:40:45,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537116 conditions, 55687 events. 34098/55687 cut-off events. For 1617328/1617328 co-relation queries the response was YES. Maximal size of possible extension queue 3355. Compared 481332 event pairs, 270 based on Foata normal form. 976/56663 useless extension candidates. Maximal degree in co-relation 536987. Up to 11625 conditions per place. [2023-08-26 13:40:45,776 INFO L140 encePairwiseOnDemand]: 180/191 looper letters, 1267 selfloop transitions, 5183 changer transitions 0/6450 dead transitions. [2023-08-26 13:40:45,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 6450 transitions, 161400 flow [2023-08-26 13:40:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-26 13:40:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-26 13:40:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6437 transitions. [2023-08-26 13:40:45,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616653517894284 [2023-08-26 13:40:45,784 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6437 transitions. [2023-08-26 13:40:45,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6437 transitions. [2023-08-26 13:40:45,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:40:45,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6437 transitions. [2023-08-26 13:40:45,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 88.17808219178082) internal successors, (6437), 73 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states 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 13:40:45,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 191.0) internal successors, (14134), 74 states have internal predecessors, (14134), 0 states have call successors, (0), 0 states 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 13:40:45,807 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 191.0) internal successors, (14134), 74 states have internal predecessors, (14134), 0 states have call successors, (0), 0 states 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 13:40:45,807 INFO L175 Difference]: Start difference. First operand has 330 places, 2962 transitions, 69038 flow. Second operand 73 states and 6437 transitions. [2023-08-26 13:40:45,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 6450 transitions, 161400 flow [2023-08-26 13:42:16,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 6450 transitions, 153164 flow, removed 3972 selfloop flow, removed 11 redundant places. [2023-08-26 13:42:16,870 INFO L231 Difference]: Finished difference. Result has 441 places, 5803 transitions, 149132 flow [2023-08-26 13:42:16,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=63760, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=149132, PETRI_PLACES=441, PETRI_TRANSITIONS=5803} [2023-08-26 13:42:16,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2023-08-26 13:42:16,874 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 5803 transitions, 149132 flow [2023-08-26 13:42:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 81.5) internal successors, (1304), 16 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states 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 13:42:16,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:42:16,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:42:16,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 13:42:17,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:42:17,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:42:17,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:42:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -281537790, now seen corresponding path program 4 times [2023-08-26 13:42:17,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:42:17,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040111867] [2023-08-26 13:42:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:42:17,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:42:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:42:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:42:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:42:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040111867] [2023-08-26 13:42:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040111867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:42:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357351101] [2023-08-26 13:42:17,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:42:17,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:42:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:42:17,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:42:17,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:42:17,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:42:17,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:42:17,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:42:17,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:42:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:42:17,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:42:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:42:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357351101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:42:17,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:42:17,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 9] total 18 [2023-08-26 13:42:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740993670] [2023-08-26 13:42:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:42:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:42:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:42:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:42:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:42:17,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2023-08-26 13:42:17,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 5803 transitions, 149132 flow. Second operand has 19 states, 19 states have (on average 81.42105263157895) internal successors, (1547), 19 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 13:42:17,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:42:17,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2023-08-26 13:42:17,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:30,634 INFO L124 PetriNetUnfolderBase]: 61788/102736 cut-off events. [2023-08-26 13:44:30,634 INFO L125 PetriNetUnfolderBase]: For 4710671/4710671 co-relation queries the response was YES. [2023-08-26 13:44:33,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117505 conditions, 102736 events. 61788/102736 cut-off events. For 4710671/4710671 co-relation queries the response was YES. Maximal size of possible extension queue 6034. Compared 978683 event pairs, 1091 based on Foata normal form. 1888/104624 useless extension candidates. Maximal degree in co-relation 1117335. Up to 20679 conditions per place. [2023-08-26 13:44:34,049 INFO L140 encePairwiseOnDemand]: 180/191 looper letters, 3978 selfloop transitions, 8467 changer transitions 23/12468 dead transitions. [2023-08-26 13:44:34,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 12468 transitions, 344737 flow [2023-08-26 13:44:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-26 13:44:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-26 13:44:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7706 transitions. [2023-08-26 13:44:34,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46374195101402177 [2023-08-26 13:44:34,058 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7706 transitions. [2023-08-26 13:44:34,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7706 transitions. [2023-08-26 13:44:34,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:34,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7706 transitions. [2023-08-26 13:44:34,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 88.57471264367815) internal successors, (7706), 87 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states 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 13:44:34,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 191.0) internal successors, (16808), 88 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states 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 13:44:34,082 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 191.0) internal successors, (16808), 88 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states 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 13:44:34,082 INFO L175 Difference]: Start difference. First operand has 441 places, 5803 transitions, 149132 flow. Second operand 87 states and 7706 transitions. [2023-08-26 13:44:34,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 12468 transitions, 344737 flow Received shutdown request... [2023-08-26 13:52:49,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-26 13:52:49,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 13:52:49,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:52:49,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:52:49,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 13:52:49,635 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 13:52:49,636 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:52:49,636 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:52:49,636 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-26 13:52:49,637 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:52:49,638 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:52:49,638 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:52:49,638 INFO L445 BasicCegarLoop]: Path program histogram: [9, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:52:49,641 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:52:49,641 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:52:49,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:52:49 BasicIcfg [2023-08-26 13:52:49,644 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:52:49,644 INFO L158 Benchmark]: Toolchain (without parser) took 828358.31ms. Allocated memory was 379.6MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 356.0MB in the beginning and 4.3GB in the end (delta: -4.0GB). Peak memory consumption was 10.8GB. Max. memory is 16.0GB. [2023-08-26 13:52:49,644 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 379.6MB. Free memory is still 357.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:52:49,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.62ms. Allocated memory is still 379.6MB. Free memory was 355.3MB in the beginning and 344.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:52:49,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.57ms. Allocated memory is still 379.6MB. Free memory was 344.5MB in the beginning and 343.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:52:49,645 INFO L158 Benchmark]: Boogie Preprocessor took 23.69ms. Allocated memory is still 379.6MB. Free memory was 343.0MB in the beginning and 341.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:52:49,645 INFO L158 Benchmark]: RCFGBuilder took 427.71ms. Allocated memory is still 379.6MB. Free memory was 341.6MB in the beginning and 322.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 13:52:49,646 INFO L158 Benchmark]: TraceAbstraction took 827649.84ms. Allocated memory was 379.6MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 322.1MB in the beginning and 4.3GB in the end (delta: -4.0GB). Peak memory consumption was 10.8GB. Max. memory is 16.0GB. [2023-08-26 13:52:49,647 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 379.6MB. Free memory is still 357.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 221.62ms. Allocated memory is still 379.6MB. Free memory was 355.3MB in the beginning and 344.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.57ms. Allocated memory is still 379.6MB. Free memory was 344.5MB in the beginning and 343.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.69ms. Allocated memory is still 379.6MB. Free memory was 343.0MB in the beginning and 341.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 427.71ms. Allocated memory is still 379.6MB. Free memory was 341.6MB in the beginning and 322.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 827649.84ms. Allocated memory was 379.6MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 322.1MB in the beginning and 4.3GB in the end (delta: -4.0GB). Peak memory consumption was 10.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 96 PlacesBefore, 42 PlacesAfterwards, 93 TransitionsBefore, 35 TransitionsAfterwards, 1124 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 84 TotalNumberOfCompositions, 1820 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1410, independent: 1384, independent conditional: 0, independent unconditional: 1384, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 568, independent: 562, independent conditional: 0, independent unconditional: 562, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1410, independent: 822, independent conditional: 0, independent unconditional: 822, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 568, unknown conditional: 0, unknown unconditional: 568] , Statistics on independence cache: Total cache size (in pairs): 86, Positive cache size: 82, Positive conditional cache size: 0, Positive unconditional cache size: 82, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 123 locations, 16 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: 827.5s, OverallIterations: 27, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 813.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2781 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2781 mSDsluCounter, 117 SdHoareTripleChecker+Invalid, 7.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 56 mSDsCounter, 430 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10235 IncrementalHoareTripleChecker+Invalid, 10665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 430 mSolverCounterUnsat, 61 mSDtfsCounter, 10235 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 666 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8400 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149132occurred in iteration=26, InterpolantAutomatonStates: 324, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 702 ConstructedInterpolants, 0 QuantifiedInterpolants, 7326 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1454 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 42 InterpolantComputations, 20 PerfectInterpolantSequences, 20/52 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown