/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/parallel-ticket-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:24:07,819 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:24:07,901 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 13:24:07,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:24:07,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:24:07,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:24:07,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:24:07,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:24:07,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:24:07,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:24:07,943 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:24:07,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:24:07,943 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:24:07,944 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:24:07,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:24:07,945 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:24:07,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:24:07,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:24:07,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:24:07,946 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:24:07,946 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:24:07,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:24:07,946 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:24:07,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:24:07,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:24:07,948 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:24:07,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:24:07,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:07,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:24:07,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:24:07,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:24:07,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:24:07,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:24:07,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:24:07,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:24:07,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:24:08,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:24:08,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:24:08,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:24:08,275 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:24:08,276 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:24:08,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-3.wvr.c [2023-08-26 13:24:09,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:24:09,736 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:24:09,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-3.wvr.c [2023-08-26 13:24:09,742 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70c02132a/372199bc4c4a4c61a5102a2494042b92/FLAGcfcc571ea [2023-08-26 13:24:09,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70c02132a/372199bc4c4a4c61a5102a2494042b92 [2023-08-26 13:24:09,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:24:09,755 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:24:09,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:09,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:24:09,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:24:09,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:09" (1/1) ... [2023-08-26 13:24:09,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d60bcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:09, skipping insertion in model container [2023-08-26 13:24:09,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:09" (1/1) ... [2023-08-26 13:24:09,781 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:24:09,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:09,972 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:24:10,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:10,019 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:10,020 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:10,030 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:24:10,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10 WrapperNode [2023-08-26 13:24:10,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:10,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:10,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:24:10,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:24:10,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,084 INFO L138 Inliner]: procedures = 22, calls = 56, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 167 [2023-08-26 13:24:10,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:10,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:24:10,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:24:10,086 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:24:10,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,115 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:24:10,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:24:10,129 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:24:10,129 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:24:10,129 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (1/1) ... [2023-08-26 13:24:10,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:10,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:24:10,158 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 13:24:10,185 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 13:24:10,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:24:10,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:24:10,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:24:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:24:10,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:24:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:24:10,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:24:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:24:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:24:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:24:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:24:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:24:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:24:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:24:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:24:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:24:10,202 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 13:24:10,307 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:24:10,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:24:10,542 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:24:10,605 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:24:10,605 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:24:10,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:10 BoogieIcfgContainer [2023-08-26 13:24:10,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:24:10,609 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:24:10,609 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:24:10,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:24:10,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:24:09" (1/3) ... [2023-08-26 13:24:10,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5110cc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:10, skipping insertion in model container [2023-08-26 13:24:10,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:10" (2/3) ... [2023-08-26 13:24:10,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5110cc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:10, skipping insertion in model container [2023-08-26 13:24:10,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:10" (3/3) ... [2023-08-26 13:24:10,614 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-3.wvr.c [2023-08-26 13:24:10,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:24:10,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:24:10,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:24:10,684 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:24:10,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 132 transitions, 288 flow [2023-08-26 13:24:10,799 INFO L124 PetriNetUnfolderBase]: 2/129 cut-off events. [2023-08-26 13:24:10,799 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:24:10,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 129 events. 2/129 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-26 13:24:10,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 132 transitions, 288 flow [2023-08-26 13:24:10,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 118 transitions, 254 flow [2023-08-26 13:24:10,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:24:10,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 118 transitions, 254 flow [2023-08-26 13:24:10,855 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 118 transitions, 254 flow [2023-08-26 13:24:10,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 118 transitions, 254 flow [2023-08-26 13:24:10,879 INFO L124 PetriNetUnfolderBase]: 2/118 cut-off events. [2023-08-26 13:24:10,879 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:24:10,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 118 events. 2/118 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-26 13:24:10,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 930 [2023-08-26 13:24:15,249 INFO L134 LiptonReduction]: Checked pairs total: 4771 [2023-08-26 13:24:15,249 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-26 13:24:15,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:24:15,274 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;@45aed5f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:24:15,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:24:15,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:24:15,276 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 13:24:15,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:24:15,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:15,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:24:15,277 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 13:24:15,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 514, now seen corresponding path program 1 times [2023-08-26 13:24:15,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:15,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056857155] [2023-08-26 13:24:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:15,369 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 13:24:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:15,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056857155] [2023-08-26 13:24:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056857155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:15,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:15,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:24:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207176452] [2023-08-26 13:24:15,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:24:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:24:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:24:15,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 243 [2023-08-26 13:24:15,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 94 flow. Second operand has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 13:24:15,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:15,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 243 [2023-08-26 13:24:15,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:15,581 INFO L124 PetriNetUnfolderBase]: 729/1236 cut-off events. [2023-08-26 13:24:15,581 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-26 13:24:15,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 1236 events. 729/1236 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6241 event pairs, 729 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 2040. Up to 1149 conditions per place. [2023-08-26 13:24:15,595 INFO L140 encePairwiseOnDemand]: 241/243 looper letters, 32 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2023-08-26 13:24:15,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 36 transitions, 154 flow [2023-08-26 13:24:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:24:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:24:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 262 transitions. [2023-08-26 13:24:15,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390946502057613 [2023-08-26 13:24:15,619 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 262 transitions. [2023-08-26 13:24:15,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 262 transitions. [2023-08-26 13:24:15,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:15,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 262 transitions. [2023-08-26 13:24:15,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 131.0) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 13:24:15,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 13:24:15,631 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 13:24:15,633 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 94 flow. Second operand 2 states and 262 transitions. [2023-08-26 13:24:15,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 36 transitions, 154 flow [2023-08-26 13:24:15,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:24:15,641 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 78 flow [2023-08-26 13:24:15,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 13:24:15,647 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-26 13:24:15,647 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 78 flow [2023-08-26 13:24:15,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 13:24:15,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:15,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:24:15,648 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 13:24:15,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash 507778, now seen corresponding path program 1 times [2023-08-26 13:24:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999858737] [2023-08-26 13:24:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:15,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:15,890 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 13:24:15,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:15,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999858737] [2023-08-26 13:24:15,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999858737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:15,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:15,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:15,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093310557] [2023-08-26 13:24:15,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:15,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:15,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:15,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 243 [2023-08-26 13:24:15,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 13:24:15,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:15,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 243 [2023-08-26 13:24:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:15,997 INFO L124 PetriNetUnfolderBase]: 702/1187 cut-off events. [2023-08-26 13:24:15,998 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:15,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2312 conditions, 1187 events. 702/1187 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5953 event pairs, 702 based on Foata normal form. 0/990 useless extension candidates. Maximal degree in co-relation 2309. Up to 1101 conditions per place. [2023-08-26 13:24:16,005 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 29 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-26 13:24:16,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 134 flow [2023-08-26 13:24:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-26 13:24:16,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101508916323731 [2023-08-26 13:24:16,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 13:24:16,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,011 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 78 flow. Second operand 3 states and 299 transitions. [2023-08-26 13:24:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 134 flow [2023-08-26 13:24:16,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:24:16,013 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 76 flow [2023-08-26 13:24:16,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-26 13:24:16,017 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-26 13:24:16,017 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 76 flow [2023-08-26 13:24:16,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 13:24:16,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:16,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:24:16,019 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 13:24:16,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 507779, now seen corresponding path program 1 times [2023-08-26 13:24:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992391273] [2023-08-26 13:24:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:16,160 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 13:24:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992391273] [2023-08-26 13:24:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992391273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:16,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862001994] [2023-08-26 13:24:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:16,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 13:24:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states 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 13:24:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 13:24:16,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:16,280 INFO L124 PetriNetUnfolderBase]: 675/1138 cut-off events. [2023-08-26 13:24:16,280 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:16,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 1138 events. 675/1138 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5682 event pairs, 675 based on Foata normal form. 0/961 useless extension candidates. Maximal degree in co-relation 2214. Up to 1054 conditions per place. [2023-08-26 13:24:16,287 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 27 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-26 13:24:16,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 128 flow [2023-08-26 13:24:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-26 13:24:16,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-26 13:24:16,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-26 13:24:16,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-26 13:24:16,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-26 13:24:16,291 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 13:24:16,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,293 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 76 flow. Second operand 3 states and 306 transitions. [2023-08-26 13:24:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 128 flow [2023-08-26 13:24:16,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:16,295 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 73 flow [2023-08-26 13:24:16,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-26 13:24:16,296 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-26 13:24:16,296 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 73 flow [2023-08-26 13:24:16,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states 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 13:24:16,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:16,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:24:16,297 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 13:24:16,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash 487985532, now seen corresponding path program 1 times [2023-08-26 13:24:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956784502] [2023-08-26 13:24:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:16,394 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 13:24:16,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:16,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956784502] [2023-08-26 13:24:16,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956784502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:16,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:16,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:16,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007950243] [2023-08-26 13:24:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:16,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:16,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 13:24:16,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 13:24:16,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:16,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 13:24:16,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:16,490 INFO L124 PetriNetUnfolderBase]: 648/1087 cut-off events. [2023-08-26 13:24:16,490 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 1087 events. 648/1087 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5362 event pairs, 648 based on Foata normal form. 0/931 useless extension candidates. Maximal degree in co-relation 2117. Up to 1007 conditions per place. [2023-08-26 13:24:16,495 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 13:24:16,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 121 flow [2023-08-26 13:24:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-26 13:24:16,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170096021947874 [2023-08-26 13:24:16,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-26 13:24:16,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-26 13:24:16,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-26 13:24:16,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 13:24:16,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,500 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 73 flow. Second operand 3 states and 304 transitions. [2023-08-26 13:24:16,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 121 flow [2023-08-26 13:24:16,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:16,501 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 70 flow [2023-08-26 13:24:16,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2023-08-26 13:24:16,502 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-26 13:24:16,502 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 70 flow [2023-08-26 13:24:16,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 13:24:16,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:16,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:24:16,503 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 13:24:16,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash 487985530, now seen corresponding path program 1 times [2023-08-26 13:24:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540803966] [2023-08-26 13:24:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:16,539 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 13:24:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:16,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540803966] [2023-08-26 13:24:16,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540803966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:16,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:16,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:16,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711806958] [2023-08-26 13:24:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:16,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 243 [2023-08-26 13:24:16,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 13:24:16,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:16,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 243 [2023-08-26 13:24:16,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:16,623 INFO L124 PetriNetUnfolderBase]: 621/1036 cut-off events. [2023-08-26 13:24:16,623 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 1036 events. 621/1036 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5064 event pairs, 621 based on Foata normal form. 0/901 useless extension candidates. Maximal degree in co-relation 2020. Up to 960 conditions per place. [2023-08-26 13:24:16,629 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 23 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 13:24:16,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 114 flow [2023-08-26 13:24:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-26 13:24:16,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401920438957476 [2023-08-26 13:24:16,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-26 13:24:16,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-26 13:24:16,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-26 13:24:16,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 13:24:16,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,633 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 70 flow. Second operand 3 states and 293 transitions. [2023-08-26 13:24:16,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 114 flow [2023-08-26 13:24:16,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:16,634 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 67 flow [2023-08-26 13:24:16,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-26 13:24:16,635 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -10 predicate places. [2023-08-26 13:24:16,635 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 67 flow [2023-08-26 13:24:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 13:24:16,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:16,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:24:16,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:24:16,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 802671953, now seen corresponding path program 1 times [2023-08-26 13:24:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901986273] [2023-08-26 13:24:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:16,717 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 13:24:16,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:16,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901986273] [2023-08-26 13:24:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901986273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:16,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:24:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840418024] [2023-08-26 13:24:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:16,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:24:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:24:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:24:16,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 243 [2023-08-26 13:24:16,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 13:24:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 243 [2023-08-26 13:24:16,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:16,795 INFO L124 PetriNetUnfolderBase]: 477/812 cut-off events. [2023-08-26 13:24:16,795 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:16,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 812 events. 477/812 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3798 event pairs, 477 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 1589. Up to 752 conditions per place. [2023-08-26 13:24:16,799 INFO L140 encePairwiseOnDemand]: 241/243 looper letters, 22 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 13:24:16,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 111 flow [2023-08-26 13:24:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-26 13:24:16,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448559670781895 [2023-08-26 13:24:16,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-26 13:24:16,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-26 13:24:16,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-26 13:24:16,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 13:24:16,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,804 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 67 flow. Second operand 3 states and 273 transitions. [2023-08-26 13:24:16,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 111 flow [2023-08-26 13:24:16,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:16,805 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 66 flow [2023-08-26 13:24:16,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=66, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-26 13:24:16,805 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -10 predicate places. [2023-08-26 13:24:16,806 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 66 flow [2023-08-26 13:24:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 13:24:16,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:24:16,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:24:16,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 802671954, now seen corresponding path program 1 times [2023-08-26 13:24:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079500367] [2023-08-26 13:24:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:16,905 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 13:24:16,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:16,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079500367] [2023-08-26 13:24:16,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079500367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:16,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:16,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828375239] [2023-08-26 13:24:16,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:16,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:16,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 13:24:16,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 13:24:16,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:16,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 13:24:16,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:16,977 INFO L124 PetriNetUnfolderBase]: 333/588 cut-off events. [2023-08-26 13:24:16,978 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:16,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 588 events. 333/588 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2580 event pairs, 333 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 1158. Up to 544 conditions per place. [2023-08-26 13:24:16,981 INFO L140 encePairwiseOnDemand]: 241/243 looper letters, 21 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 13:24:16,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 108 flow [2023-08-26 13:24:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-26 13:24:16,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101508916323731 [2023-08-26 13:24:16,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:16,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-26 13:24:16,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 13:24:16,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 13:24:16,986 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 66 flow. Second operand 3 states and 299 transitions. [2023-08-26 13:24:16,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 108 flow [2023-08-26 13:24:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:16,987 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 65 flow [2023-08-26 13:24:16,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 13:24:16,988 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -10 predicate places. [2023-08-26 13:24:16,988 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 65 flow [2023-08-26 13:24:16,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 13:24:16,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:16,989 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:16,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:24:16,989 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 13:24:16,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 989090072, now seen corresponding path program 1 times [2023-08-26 13:24:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22479969] [2023-08-26 13:24:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:17,386 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 13:24:17,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:17,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22479969] [2023-08-26 13:24:17,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22479969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:17,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:17,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:24:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602941085] [2023-08-26 13:24:17,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:17,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:17,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:17,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:17,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 243 [2023-08-26 13:24:17,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 65 flow. Second operand has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:17,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:17,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 243 [2023-08-26 13:24:17,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:17,618 INFO L124 PetriNetUnfolderBase]: 991/1577 cut-off events. [2023-08-26 13:24:17,618 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-26 13:24:17,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1577 events. 991/1577 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6830 event pairs, 336 based on Foata normal form. 1/1578 useless extension candidates. Maximal degree in co-relation 3203. Up to 651 conditions per place. [2023-08-26 13:24:17,625 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 60 selfloop transitions, 9 changer transitions 13/82 dead transitions. [2023-08-26 13:24:17,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 82 transitions, 350 flow [2023-08-26 13:24:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:24:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:24:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 707 transitions. [2023-08-26 13:24:17,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849108367626886 [2023-08-26 13:24:17,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 707 transitions. [2023-08-26 13:24:17,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 707 transitions. [2023-08-26 13:24:17,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:17,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 707 transitions. [2023-08-26 13:24:17,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.83333333333333) internal successors, (707), 6 states have internal predecessors, (707), 0 states have call successors, (0), 0 states 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 13:24:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states 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 13:24:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states 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 13:24:17,632 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 65 flow. Second operand 6 states and 707 transitions. [2023-08-26 13:24:17,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 82 transitions, 350 flow [2023-08-26 13:24:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 82 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:17,634 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 115 flow [2023-08-26 13:24:17,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-26 13:24:17,634 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 13:24:17,634 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 115 flow [2023-08-26 13:24:17,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:17,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:17,635 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:24:17,635 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 13:24:17,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -123080908, now seen corresponding path program 2 times [2023-08-26 13:24:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499342460] [2023-08-26 13:24:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:17,808 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 13:24:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499342460] [2023-08-26 13:24:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499342460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:17,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:17,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:17,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507369570] [2023-08-26 13:24:17,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:17,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 13:24:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:17,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:17,984 INFO L124 PetriNetUnfolderBase]: 374/707 cut-off events. [2023-08-26 13:24:17,984 INFO L125 PetriNetUnfolderBase]: For 70/72 co-relation queries the response was YES. [2023-08-26 13:24:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 707 events. 374/707 cut-off events. For 70/72 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3326 event pairs, 57 based on Foata normal form. 28/723 useless extension candidates. Maximal degree in co-relation 1485. Up to 359 conditions per place. [2023-08-26 13:24:17,988 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 50 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2023-08-26 13:24:17,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 336 flow [2023-08-26 13:24:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 802 transitions. [2023-08-26 13:24:17,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714873603762493 [2023-08-26 13:24:17,991 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 802 transitions. [2023-08-26 13:24:17,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 802 transitions. [2023-08-26 13:24:17,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:17,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 802 transitions. [2023-08-26 13:24:17,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 13:24:17,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:17,996 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:17,996 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 115 flow. Second operand 7 states and 802 transitions. [2023-08-26 13:24:17,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 336 flow [2023-08-26 13:24:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 331 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:17,999 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 200 flow [2023-08-26 13:24:17,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-26 13:24:18,000 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2023-08-26 13:24:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 200 flow [2023-08-26 13:24:18,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 13:24:18,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:18,000 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:24:18,001 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 13:24:18,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2144477094, now seen corresponding path program 3 times [2023-08-26 13:24:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:18,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403248991] [2023-08-26 13:24:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:18,196 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 13:24:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403248991] [2023-08-26 13:24:18,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403248991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:18,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:18,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:18,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360309632] [2023-08-26 13:24:18,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:18,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:18,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:18,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 13:24:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:18,376 INFO L124 PetriNetUnfolderBase]: 283/574 cut-off events. [2023-08-26 13:24:18,376 INFO L125 PetriNetUnfolderBase]: For 345/359 co-relation queries the response was YES. [2023-08-26 13:24:18,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 574 events. 283/574 cut-off events. For 345/359 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2617 event pairs, 52 based on Foata normal form. 34/602 useless extension candidates. Maximal degree in co-relation 1573. Up to 296 conditions per place. [2023-08-26 13:24:18,380 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 36 selfloop transitions, 11 changer transitions 12/70 dead transitions. [2023-08-26 13:24:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 383 flow [2023-08-26 13:24:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 794 transitions. [2023-08-26 13:24:18,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46678424456202233 [2023-08-26 13:24:18,383 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 794 transitions. [2023-08-26 13:24:18,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 794 transitions. [2023-08-26 13:24:18,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:18,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 794 transitions. [2023-08-26 13:24:18,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 13:24:18,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:18,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:18,389 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 200 flow. Second operand 7 states and 794 transitions. [2023-08-26 13:24:18,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 383 flow [2023-08-26 13:24:18,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 383 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:24:18,392 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 227 flow [2023-08-26 13:24:18,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-08-26 13:24:18,392 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2023-08-26 13:24:18,393 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 227 flow [2023-08-26 13:24:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 13:24:18,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:18,393 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:18,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:24:18,393 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 13:24:18,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1270034568, now seen corresponding path program 4 times [2023-08-26 13:24:18,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:18,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427434617] [2023-08-26 13:24:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:18,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:18,569 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 13:24:18,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427434617] [2023-08-26 13:24:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427434617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:18,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:24:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217964652] [2023-08-26 13:24:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:18,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:24:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:24:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:24:18,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 243 [2023-08-26 13:24:18,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 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 13:24:18,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:18,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 243 [2023-08-26 13:24:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:18,665 INFO L124 PetriNetUnfolderBase]: 116/251 cut-off events. [2023-08-26 13:24:18,665 INFO L125 PetriNetUnfolderBase]: For 305/309 co-relation queries the response was YES. [2023-08-26 13:24:18,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 251 events. 116/251 cut-off events. For 305/309 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 897 event pairs, 14 based on Foata normal form. 20/269 useless extension candidates. Maximal degree in co-relation 809. Up to 133 conditions per place. [2023-08-26 13:24:18,667 INFO L140 encePairwiseOnDemand]: 236/243 looper letters, 38 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2023-08-26 13:24:18,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 375 flow [2023-08-26 13:24:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:24:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:24:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-08-26 13:24:18,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47901234567901235 [2023-08-26 13:24:18,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-08-26 13:24:18,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-08-26 13:24:18,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:18,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-08-26 13:24:18,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states 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 13:24:18,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 13:24:18,673 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 13:24:18,673 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 227 flow. Second operand 5 states and 582 transitions. [2023-08-26 13:24:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 375 flow [2023-08-26 13:24:18,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 341 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:18,676 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 230 flow [2023-08-26 13:24:18,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-26 13:24:18,676 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2023-08-26 13:24:18,677 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 230 flow [2023-08-26 13:24:18,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 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 13:24:18,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:18,677 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:18,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:24:18,677 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 13:24:18,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1928729172, now seen corresponding path program 5 times [2023-08-26 13:24:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129594432] [2023-08-26 13:24:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:18,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:18,869 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 13:24:18,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129594432] [2023-08-26 13:24:18,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129594432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:18,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:18,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78787598] [2023-08-26 13:24:18,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:18,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:18,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:18,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:18,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:18,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:18,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:18,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:19,077 INFO L124 PetriNetUnfolderBase]: 120/267 cut-off events. [2023-08-26 13:24:19,077 INFO L125 PetriNetUnfolderBase]: For 453/479 co-relation queries the response was YES. [2023-08-26 13:24:19,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 267 events. 120/267 cut-off events. For 453/479 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1019 event pairs, 12 based on Foata normal form. 34/301 useless extension candidates. Maximal degree in co-relation 911. Up to 133 conditions per place. [2023-08-26 13:24:19,079 INFO L140 encePairwiseOnDemand]: 236/243 looper letters, 42 selfloop transitions, 15 changer transitions 11/74 dead transitions. [2023-08-26 13:24:19,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 499 flow [2023-08-26 13:24:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:24:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:24:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1327 transitions. [2023-08-26 13:24:19,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45507544581618653 [2023-08-26 13:24:19,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1327 transitions. [2023-08-26 13:24:19,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1327 transitions. [2023-08-26 13:24:19,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:19,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1327 transitions. [2023-08-26 13:24:19,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.58333333333333) internal successors, (1327), 12 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states 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 13:24:19,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 243.0) internal successors, (3159), 13 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 13:24:19,090 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 243.0) internal successors, (3159), 13 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 13:24:19,090 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 230 flow. Second operand 12 states and 1327 transitions. [2023-08-26 13:24:19,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 499 flow [2023-08-26 13:24:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 485 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:24:19,093 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 284 flow [2023-08-26 13:24:19,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=284, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-08-26 13:24:19,094 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2023-08-26 13:24:19,094 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 284 flow [2023-08-26 13:24:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:19,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:19,095 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:19,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:24:19,095 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 13:24:19,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash -141510714, now seen corresponding path program 6 times [2023-08-26 13:24:19,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:19,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107648996] [2023-08-26 13:24:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:19,273 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 13:24:19,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107648996] [2023-08-26 13:24:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107648996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:19,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:19,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276771951] [2023-08-26 13:24:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:19,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:19,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:19,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:19,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 284 flow. Second operand has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:19,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:19,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:19,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:19,475 INFO L124 PetriNetUnfolderBase]: 142/329 cut-off events. [2023-08-26 13:24:19,475 INFO L125 PetriNetUnfolderBase]: For 630/656 co-relation queries the response was YES. [2023-08-26 13:24:19,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 329 events. 142/329 cut-off events. For 630/656 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1395 event pairs, 20 based on Foata normal form. 22/351 useless extension candidates. Maximal degree in co-relation 1139. Up to 127 conditions per place. [2023-08-26 13:24:19,478 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 45 selfloop transitions, 18 changer transitions 6/75 dead transitions. [2023-08-26 13:24:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 526 flow [2023-08-26 13:24:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1117 transitions. [2023-08-26 13:24:19,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596707818930041 [2023-08-26 13:24:19,481 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1117 transitions. [2023-08-26 13:24:19,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1117 transitions. [2023-08-26 13:24:19,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:19,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1117 transitions. [2023-08-26 13:24:19,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 13:24:19,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 243.0) internal successors, (2673), 11 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states 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 13:24:19,487 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 243.0) internal successors, (2673), 11 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states 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 13:24:19,488 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 284 flow. Second operand 10 states and 1117 transitions. [2023-08-26 13:24:19,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 526 flow [2023-08-26 13:24:19,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 488 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-26 13:24:19,491 INFO L231 Difference]: Finished difference. Result has 72 places, 46 transitions, 307 flow [2023-08-26 13:24:19,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=72, PETRI_TRANSITIONS=46} [2023-08-26 13:24:19,492 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2023-08-26 13:24:19,492 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 46 transitions, 307 flow [2023-08-26 13:24:19,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:19,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:19,493 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:24:19,493 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 13:24:19,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash -174785716, now seen corresponding path program 7 times [2023-08-26 13:24:19,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:19,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281561679] [2023-08-26 13:24:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:19,648 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 13:24:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281561679] [2023-08-26 13:24:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281561679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:19,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:19,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229934785] [2023-08-26 13:24:19,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:19,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:19,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:19,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 46 transitions, 307 flow. Second operand has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:19,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:19,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:19,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:19,863 INFO L124 PetriNetUnfolderBase]: 149/358 cut-off events. [2023-08-26 13:24:19,863 INFO L125 PetriNetUnfolderBase]: For 690/718 co-relation queries the response was YES. [2023-08-26 13:24:19,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 358 events. 149/358 cut-off events. For 690/718 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1545 event pairs, 18 based on Foata normal form. 18/376 useless extension candidates. Maximal degree in co-relation 1235. Up to 135 conditions per place. [2023-08-26 13:24:19,866 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 43 selfloop transitions, 22 changer transitions 11/82 dead transitions. [2023-08-26 13:24:19,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 590 flow [2023-08-26 13:24:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1119 transitions. [2023-08-26 13:24:19,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604938271604938 [2023-08-26 13:24:19,869 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1119 transitions. [2023-08-26 13:24:19,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1119 transitions. [2023-08-26 13:24:19,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:19,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1119 transitions. [2023-08-26 13:24:19,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 111.9) internal successors, (1119), 10 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states 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 13:24:19,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 243.0) internal successors, (2673), 11 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states 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 13:24:19,876 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 243.0) internal successors, (2673), 11 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states 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 13:24:19,876 INFO L175 Difference]: Start difference. First operand has 72 places, 46 transitions, 307 flow. Second operand 10 states and 1119 transitions. [2023-08-26 13:24:19,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 590 flow [2023-08-26 13:24:19,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 533 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-08-26 13:24:19,880 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 346 flow [2023-08-26 13:24:19,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2023-08-26 13:24:19,881 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 25 predicate places. [2023-08-26 13:24:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 346 flow [2023-08-26 13:24:19,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:19,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:19,882 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:24:19,882 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 13:24:19,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2068347574, now seen corresponding path program 8 times [2023-08-26 13:24:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:19,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550929934] [2023-08-26 13:24:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:20,043 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 13:24:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550929934] [2023-08-26 13:24:20,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550929934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:20,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:20,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677601190] [2023-08-26 13:24:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:20,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:20,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:20,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:20,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:20,187 INFO L124 PetriNetUnfolderBase]: 120/293 cut-off events. [2023-08-26 13:24:20,187 INFO L125 PetriNetUnfolderBase]: For 621/653 co-relation queries the response was YES. [2023-08-26 13:24:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 293 events. 120/293 cut-off events. For 621/653 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1195 event pairs, 24 based on Foata normal form. 26/319 useless extension candidates. Maximal degree in co-relation 1077. Up to 129 conditions per place. [2023-08-26 13:24:20,189 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 40 selfloop transitions, 15 changer transitions 9/70 dead transitions. [2023-08-26 13:24:20,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 529 flow [2023-08-26 13:24:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:24:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:24:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 900 transitions. [2023-08-26 13:24:20,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-26 13:24:20,192 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 900 transitions. [2023-08-26 13:24:20,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 900 transitions. [2023-08-26 13:24:20,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:20,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 900 transitions. [2023-08-26 13:24:20,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.5) internal successors, (900), 8 states have internal predecessors, (900), 0 states have call successors, (0), 0 states 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 13:24:20,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states 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 13:24:20,198 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states 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 13:24:20,198 INFO L175 Difference]: Start difference. First operand has 73 places, 50 transitions, 346 flow. Second operand 8 states and 900 transitions. [2023-08-26 13:24:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 529 flow [2023-08-26 13:24:20,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 502 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-26 13:24:20,201 INFO L231 Difference]: Finished difference. Result has 70 places, 43 transitions, 292 flow [2023-08-26 13:24:20,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=70, PETRI_TRANSITIONS=43} [2023-08-26 13:24:20,202 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 22 predicate places. [2023-08-26 13:24:20,202 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 43 transitions, 292 flow [2023-08-26 13:24:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:20,203 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:20,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:24:20,203 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 13:24:20,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1473888660, now seen corresponding path program 9 times [2023-08-26 13:24:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:20,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590191978] [2023-08-26 13:24:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:20,359 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 13:24:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590191978] [2023-08-26 13:24:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590191978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:20,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:20,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690383761] [2023-08-26 13:24:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:20,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:20,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 43 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:20,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:20,474 INFO L124 PetriNetUnfolderBase]: 104/267 cut-off events. [2023-08-26 13:24:20,475 INFO L125 PetriNetUnfolderBase]: For 618/622 co-relation queries the response was YES. [2023-08-26 13:24:20,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 267 events. 104/267 cut-off events. For 618/622 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1059 event pairs, 16 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 967. Up to 106 conditions per place. [2023-08-26 13:24:20,477 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 36 selfloop transitions, 23 changer transitions 5/70 dead transitions. [2023-08-26 13:24:20,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 535 flow [2023-08-26 13:24:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 788 transitions. [2023-08-26 13:24:20,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46325690770135214 [2023-08-26 13:24:20,480 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 788 transitions. [2023-08-26 13:24:20,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 788 transitions. [2023-08-26 13:24:20,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:20,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 788 transitions. [2023-08-26 13:24:20,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.57142857142857) internal successors, (788), 7 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 13:24:20,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:20,484 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:20,484 INFO L175 Difference]: Start difference. First operand has 70 places, 43 transitions, 292 flow. Second operand 7 states and 788 transitions. [2023-08-26 13:24:20,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 535 flow [2023-08-26 13:24:20,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 489 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:20,488 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 380 flow [2023-08-26 13:24:20,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-26 13:24:20,488 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-26 13:24:20,488 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 380 flow [2023-08-26 13:24:20,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:20,489 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 13:24:20,489 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 13:24:20,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash 259368012, now seen corresponding path program 10 times [2023-08-26 13:24:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063606858] [2023-08-26 13:24:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:20,675 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 13:24:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063606858] [2023-08-26 13:24:20,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063606858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:20,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:20,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:20,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538174654] [2023-08-26 13:24:20,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:20,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:20,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:20,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:20,794 INFO L124 PetriNetUnfolderBase]: 87/232 cut-off events. [2023-08-26 13:24:20,794 INFO L125 PetriNetUnfolderBase]: For 616/620 co-relation queries the response was YES. [2023-08-26 13:24:20,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 232 events. 87/232 cut-off events. For 616/620 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 891 event pairs, 8 based on Foata normal form. 12/244 useless extension candidates. Maximal degree in co-relation 881. Up to 70 conditions per place. [2023-08-26 13:24:20,796 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 28 selfloop transitions, 18 changer transitions 15/65 dead transitions. [2023-08-26 13:24:20,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 524 flow [2023-08-26 13:24:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 787 transitions. [2023-08-26 13:24:20,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626690182245738 [2023-08-26 13:24:20,799 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 787 transitions. [2023-08-26 13:24:20,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 787 transitions. [2023-08-26 13:24:20,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:20,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 787 transitions. [2023-08-26 13:24:20,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.42857142857143) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 13:24:20,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:20,804 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:20,804 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 380 flow. Second operand 7 states and 787 transitions. [2023-08-26 13:24:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 524 flow [2023-08-26 13:24:20,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 469 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-26 13:24:20,808 INFO L231 Difference]: Finished difference. Result has 68 places, 41 transitions, 300 flow [2023-08-26 13:24:20,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=68, PETRI_TRANSITIONS=41} [2023-08-26 13:24:20,808 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 20 predicate places. [2023-08-26 13:24:20,809 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 41 transitions, 300 flow [2023-08-26 13:24:20,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:20,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:20,809 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 13:24:20,809 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 13:24:20,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1073430702, now seen corresponding path program 11 times [2023-08-26 13:24:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9588084] [2023-08-26 13:24:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:20,966 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 13:24:20,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9588084] [2023-08-26 13:24:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9588084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:20,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:20,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:20,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264857910] [2023-08-26 13:24:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:20,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:20,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:20,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 41 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:20,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:21,128 INFO L124 PetriNetUnfolderBase]: 36/109 cut-off events. [2023-08-26 13:24:21,129 INFO L125 PetriNetUnfolderBase]: For 370/374 co-relation queries the response was YES. [2023-08-26 13:24:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 109 events. 36/109 cut-off events. For 370/374 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 295 event pairs, 4 based on Foata normal form. 12/121 useless extension candidates. Maximal degree in co-relation 428. Up to 47 conditions per place. [2023-08-26 13:24:21,130 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 23 selfloop transitions, 3 changer transitions 15/45 dead transitions. [2023-08-26 13:24:21,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 45 transitions, 342 flow [2023-08-26 13:24:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 986 transitions. [2023-08-26 13:24:21,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508459076360311 [2023-08-26 13:24:21,134 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 986 transitions. [2023-08-26 13:24:21,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 986 transitions. [2023-08-26 13:24:21,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:21,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 986 transitions. [2023-08-26 13:24:21,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.55555555555556) internal successors, (986), 9 states have internal predecessors, (986), 0 states have call successors, (0), 0 states 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 13:24:21,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 13:24:21,141 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 13:24:21,141 INFO L175 Difference]: Start difference. First operand has 68 places, 41 transitions, 300 flow. Second operand 9 states and 986 transitions. [2023-08-26 13:24:21,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 45 transitions, 342 flow [2023-08-26 13:24:21,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 45 transitions, 288 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-08-26 13:24:21,144 INFO L231 Difference]: Finished difference. Result has 64 places, 28 transitions, 139 flow [2023-08-26 13:24:21,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=139, PETRI_PLACES=64, PETRI_TRANSITIONS=28} [2023-08-26 13:24:21,145 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2023-08-26 13:24:21,145 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 28 transitions, 139 flow [2023-08-26 13:24:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 13:24:21,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:21,146 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, 1, 1, 1, 1, 1] [2023-08-26 13:24:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 13:24:21,147 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 13:24:21,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash -888494394, now seen corresponding path program 12 times [2023-08-26 13:24:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797288153] [2023-08-26 13:24:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:21,318 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 13:24:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:21,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797288153] [2023-08-26 13:24:21,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797288153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:21,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:21,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495409488] [2023-08-26 13:24:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:21,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:21,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:21,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 243 [2023-08-26 13:24:21,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 28 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:21,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:21,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 243 [2023-08-26 13:24:21,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:21,369 INFO L124 PetriNetUnfolderBase]: 9/34 cut-off events. [2023-08-26 13:24:21,369 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-26 13:24:21,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 34 events. 9/34 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 4/38 useless extension candidates. Maximal degree in co-relation 116. Up to 9 conditions per place. [2023-08-26 13:24:21,369 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 13:24:21,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 20 transitions, 123 flow [2023-08-26 13:24:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 754 transitions. [2023-08-26 13:24:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432686654908877 [2023-08-26 13:24:21,371 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 754 transitions. [2023-08-26 13:24:21,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 754 transitions. [2023-08-26 13:24:21,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:21,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 754 transitions. [2023-08-26 13:24:21,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 13:24:21,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:21,375 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 13:24:21,375 INFO L175 Difference]: Start difference. First operand has 64 places, 28 transitions, 139 flow. Second operand 7 states and 754 transitions. [2023-08-26 13:24:21,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 20 transitions, 123 flow [2023-08-26 13:24:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 20 transitions, 97 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-08-26 13:24:21,376 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-26 13:24:21,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-26 13:24:21,377 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-26 13:24:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-26 13:24:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:24:21,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-26 13:24:21,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:24:21,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:24:21,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:24:21,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (3 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:24:21,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:24:21,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:24:21,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:24:21,382 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:21,384 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:24:21,385 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:24:21,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:24:21 BasicIcfg [2023-08-26 13:24:21,388 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:24:21,388 INFO L158 Benchmark]: Toolchain (without parser) took 11632.81ms. Allocated memory was 352.3MB in the beginning and 509.6MB in the end (delta: 157.3MB). Free memory was 329.0MB in the beginning and 294.7MB in the end (delta: 34.3MB). Peak memory consumption was 193.9MB. Max. memory is 16.0GB. [2023-08-26 13:24:21,388 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 352.3MB. Free memory is still 328.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:21,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.40ms. Allocated memory is still 352.3MB. Free memory was 328.7MB in the beginning and 317.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:21,389 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.48ms. Allocated memory is still 352.3MB. Free memory was 317.3MB in the beginning and 315.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:21,389 INFO L158 Benchmark]: Boogie Preprocessor took 42.19ms. Allocated memory is still 352.3MB. Free memory was 315.6MB in the beginning and 314.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:24:21,389 INFO L158 Benchmark]: RCFGBuilder took 478.88ms. Allocated memory is still 352.3MB. Free memory was 313.9MB in the beginning and 292.6MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 13:24:21,389 INFO L158 Benchmark]: TraceAbstraction took 10778.37ms. Allocated memory was 352.3MB in the beginning and 509.6MB in the end (delta: 157.3MB). Free memory was 291.8MB in the beginning and 294.7MB in the end (delta: -2.8MB). Peak memory consumption was 156.2MB. Max. memory is 16.0GB. [2023-08-26 13:24:21,391 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 352.3MB. Free memory is still 328.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 274.40ms. Allocated memory is still 352.3MB. Free memory was 328.7MB in the beginning and 317.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.48ms. Allocated memory is still 352.3MB. Free memory was 317.3MB in the beginning and 315.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 42.19ms. Allocated memory is still 352.3MB. Free memory was 315.6MB in the beginning and 314.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 478.88ms. Allocated memory is still 352.3MB. Free memory was 313.9MB in the beginning and 292.6MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 10778.37ms. Allocated memory was 352.3MB in the beginning and 509.6MB in the end (delta: 157.3MB). Free memory was 291.8MB in the beginning and 294.7MB in the end (delta: -2.8MB). Peak memory consumption was 156.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 126 PlacesBefore, 48 PlacesAfterwards, 118 TransitionsBefore, 38 TransitionsAfterwards, 930 CoEnabledTransitionPairs, 7 FixpointIterations, 71 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 111 TotalNumberOfCompositions, 4771 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2352, independent: 2173, independent conditional: 0, independent unconditional: 2173, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 500, independent: 481, independent conditional: 0, independent unconditional: 481, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2352, independent: 1692, independent conditional: 0, independent unconditional: 1692, dependent: 160, dependent conditional: 0, dependent unconditional: 160, unknown: 500, unknown conditional: 0, unknown unconditional: 500] , Statistics on independence cache: Total cache size (in pairs): 149, Positive cache size: 139, Positive conditional cache size: 0, Positive unconditional cache size: 139, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 156 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: 10.7s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 437 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2044 IncrementalHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 4 mSDtfsCounter, 2044 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=380occurred in iteration=16, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 343 NumberOfCodeBlocks, 343 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 324 ConstructedInterpolants, 0 QuantifiedInterpolants, 1326 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:24:21,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...