/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/chl-time-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:08:32,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:08:32,262 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 13:08:32,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:08:32,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:08:32,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:08:32,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:08:32,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:08:32,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:08:32,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:08:32,304 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:08:32,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:08:32,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:08:32,306 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:08:32,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:08:32,306 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:08:32,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:08:32,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:08:32,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:08:32,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:08:32,307 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:08:32,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:08:32,308 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:08:32,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:08:32,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:08:32,309 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:08:32,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:08:32,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:08:32,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:08:32,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:08:32,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:08:32,311 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:08:32,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:08:32,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:08:32,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:08:32,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:08:32,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:08:32,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:08:32,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:08:32,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:08:32,635 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:08:32,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-time-subst.wvr.c [2023-08-26 13:08:33,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:08:33,958 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:08:33,958 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-time-subst.wvr.c [2023-08-26 13:08:33,966 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb8ea2ee/f51016f3197a4cb8ad6b2fb3e116e6de/FLAGe6bc4af02 [2023-08-26 13:08:33,977 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb8ea2ee/f51016f3197a4cb8ad6b2fb3e116e6de [2023-08-26 13:08:33,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:08:33,980 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:08:33,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:08:33,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:08:33,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:08:33,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:08:33" (1/1) ... [2023-08-26 13:08:33,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4262023e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:33, skipping insertion in model container [2023-08-26 13:08:33,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:08:33" (1/1) ... [2023-08-26 13:08:34,001 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:08:34,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:08:34,150 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:08:34,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:08:34,179 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:08:34,180 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:08:34,185 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:08:34,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34 WrapperNode [2023-08-26 13:08:34,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:08:34,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:08:34,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:08:34,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:08:34,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,221 INFO L138 Inliner]: procedures = 23, calls = 40, calls flagged for inlining = 12, calls inlined = 22, statements flattened = 225 [2023-08-26 13:08:34,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:08:34,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:08:34,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:08:34,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:08:34,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:08:34,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:08:34,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:08:34,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:08:34,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (1/1) ... [2023-08-26 13:08:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:08:34,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:08:34,272 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 13:08:34,282 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 13:08:34,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:08:34,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:08:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:08:34,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:08:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:08:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:08:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:08:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:08:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:08:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:08:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:08:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:08:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:08:34,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:08:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:08:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:08:34,313 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 13:08:34,414 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:08:34,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:08:34,846 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:08:35,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:08:35,040 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:08:35,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:08:35 BoogieIcfgContainer [2023-08-26 13:08:35,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:08:35,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:08:35,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:08:35,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:08:35,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:08:33" (1/3) ... [2023-08-26 13:08:35,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a33cecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:08:35, skipping insertion in model container [2023-08-26 13:08:35,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:08:34" (2/3) ... [2023-08-26 13:08:35,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a33cecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:08:35, skipping insertion in model container [2023-08-26 13:08:35,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:08:35" (3/3) ... [2023-08-26 13:08:35,051 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-time-subst.wvr.c [2023-08-26 13:08:35,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:08:35,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:08:35,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:08:35,140 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:08:35,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 127 transitions, 278 flow [2023-08-26 13:08:35,245 INFO L124 PetriNetUnfolderBase]: 1/124 cut-off events. [2023-08-26 13:08:35,246 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:08:35,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 124 events. 1/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 52 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-08-26 13:08:35,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 127 transitions, 278 flow [2023-08-26 13:08:35,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 113 transitions, 244 flow [2023-08-26 13:08:35,258 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:08:35,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 113 transitions, 244 flow [2023-08-26 13:08:35,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 113 transitions, 244 flow [2023-08-26 13:08:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 113 transitions, 244 flow [2023-08-26 13:08:35,316 INFO L124 PetriNetUnfolderBase]: 1/113 cut-off events. [2023-08-26 13:08:35,317 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:08:35,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 1/113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-08-26 13:08:35,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 378 [2023-08-26 13:08:41,321 INFO L134 LiptonReduction]: Checked pairs total: 626 [2023-08-26 13:08:41,321 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-26 13:08:41,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:08:41,348 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;@64975006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:08:41,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:08:41,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:08:41,350 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:08:41,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:41,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:41,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:08:41,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:08:41,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:41,355 INFO L85 PathProgramCache]: Analyzing trace with hash 773, now seen corresponding path program 1 times [2023-08-26 13:08:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:41,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733713814] [2023-08-26 13:08:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:08:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733713814] [2023-08-26 13:08:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733713814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:08:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521971131] [2023-08-26 13:08:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:41,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:08:41,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:08:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:08:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 245 [2023-08-26 13:08:41,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:41,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 245 [2023-08-26 13:08:41,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:41,561 INFO L124 PetriNetUnfolderBase]: 81/164 cut-off events. [2023-08-26 13:08:41,561 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:08:41,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 164 events. 81/164 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 466 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 244. Up to 165 conditions per place. [2023-08-26 13:08:41,565 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 26 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 13:08:41,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 122 flow [2023-08-26 13:08:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:08:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:08:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 260 transitions. [2023-08-26 13:08:41,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2023-08-26 13:08:41,577 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 260 transitions. [2023-08-26 13:08:41,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 260 transitions. [2023-08-26 13:08:41,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:41,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 260 transitions. [2023-08-26 13:08:41,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,586 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,588 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 74 flow. Second operand 2 states and 260 transitions. [2023-08-26 13:08:41,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 122 flow [2023-08-26 13:08:41,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:08:41,592 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 58 flow [2023-08-26 13:08:41,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-26 13:08:41,595 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:08:41,596 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 58 flow [2023-08-26 13:08:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:41,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:08:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:08:41,597 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 13:08:41,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 763773, now seen corresponding path program 1 times [2023-08-26 13:08:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:41,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788287564] [2023-08-26 13:08:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:41,786 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 13:08:41,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788287564] [2023-08-26 13:08:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788287564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:41,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:41,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:08:41,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648743866] [2023-08-26 13:08:41,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:41,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:08:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:08:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:08:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 245 [2023-08-26 13:08:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:41,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 245 [2023-08-26 13:08:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:41,849 INFO L124 PetriNetUnfolderBase]: 76/153 cut-off events. [2023-08-26 13:08:41,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 153 events. 76/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 422 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-26 13:08:41,851 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:08:41,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 102 flow [2023-08-26 13:08:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-26 13:08:41,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40680272108843535 [2023-08-26 13:08:41,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-26 13:08:41,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-26 13:08:41,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:41,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-26 13:08:41,855 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 13:08:41,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,857 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 58 flow. Second operand 3 states and 299 transitions. [2023-08-26 13:08:41,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 102 flow [2023-08-26 13:08:41,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:08:41,858 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 56 flow [2023-08-26 13:08:41,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 13:08:41,859 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:08:41,859 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 56 flow [2023-08-26 13:08:41,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:41,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:08:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:08:41,860 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 13:08:41,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash 763774, now seen corresponding path program 1 times [2023-08-26 13:08:41,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:41,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56444877] [2023-08-26 13:08:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:41,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:41,963 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 13:08:41,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56444877] [2023-08-26 13:08:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56444877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:41,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:08:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233027216] [2023-08-26 13:08:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:41,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:08:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:08:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:08:41,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-26 13:08:41,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:41,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:41,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-26 13:08:41,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:42,030 INFO L124 PetriNetUnfolderBase]: 71/142 cut-off events. [2023-08-26 13:08:42,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:42,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 142 events. 71/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 383 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 292. Up to 142 conditions per place. [2023-08-26 13:08:42,032 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 21 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:08:42,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 22 transitions, 96 flow [2023-08-26 13:08:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-26 13:08:42,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163265306122449 [2023-08-26 13:08:42,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-26 13:08:42,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-26 13:08:42,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:42,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-26 13:08:42,036 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 13:08:42,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,040 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 56 flow. Second operand 3 states and 306 transitions. [2023-08-26 13:08:42,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 22 transitions, 96 flow [2023-08-26 13:08:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:42,041 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 53 flow [2023-08-26 13:08:42,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-26 13:08:42,042 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-08-26 13:08:42,042 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 53 flow [2023-08-26 13:08:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:08:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:08:42,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:08:42,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash 734007680, now seen corresponding path program 1 times [2023-08-26 13:08:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:42,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436263117] [2023-08-26 13:08:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:42,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:42,127 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 13:08:42,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436263117] [2023-08-26 13:08:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436263117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:42,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:42,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:08:42,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235703007] [2023-08-26 13:08:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:42,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:08:42,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:08:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:08:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 245 [2023-08-26 13:08:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:42,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 245 [2023-08-26 13:08:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:42,179 INFO L124 PetriNetUnfolderBase]: 66/131 cut-off events. [2023-08-26 13:08:42,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:42,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 131 events. 66/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 342 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 271. Up to 131 conditions per place. [2023-08-26 13:08:42,181 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 13:08:42,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 89 flow [2023-08-26 13:08:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-26 13:08:42,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2023-08-26 13:08:42,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-26 13:08:42,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-26 13:08:42,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:42,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-26 13:08:42,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,209 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 53 flow. Second operand 3 states and 295 transitions. [2023-08-26 13:08:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 89 flow [2023-08-26 13:08:42,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:42,211 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 50 flow [2023-08-26 13:08:42,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-26 13:08:42,212 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-08-26 13:08:42,213 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 50 flow [2023-08-26 13:08:42,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:42,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:08:42,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:08:42,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:08:42,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 734007678, now seen corresponding path program 1 times [2023-08-26 13:08:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506582971] [2023-08-26 13:08:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:42,264 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 13:08:42,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506582971] [2023-08-26 13:08:42,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506582971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:42,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:42,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:08:42,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34977466] [2023-08-26 13:08:42,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:42,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:08:42,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:08:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:08:42,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-26 13:08:42,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:42,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-26 13:08:42,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:42,317 INFO L124 PetriNetUnfolderBase]: 61/120 cut-off events. [2023-08-26 13:08:42,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:42,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 61/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 298 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 250. Up to 120 conditions per place. [2023-08-26 13:08:42,319 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 17 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 13:08:42,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 82 flow [2023-08-26 13:08:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-26 13:08:42,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108843537414966 [2023-08-26 13:08:42,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-26 13:08:42,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-26 13:08:42,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:42,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-26 13:08:42,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,324 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 50 flow. Second operand 3 states and 302 transitions. [2023-08-26 13:08:42,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 82 flow [2023-08-26 13:08:42,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:42,325 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 47 flow [2023-08-26 13:08:42,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-26 13:08:42,327 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:08:42,327 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 47 flow [2023-08-26 13:08:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:42,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:08:42,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:08:42,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1006762995, now seen corresponding path program 1 times [2023-08-26 13:08:42,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:42,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484417233] [2023-08-26 13:08:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:42,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:42,488 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 13:08:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484417233] [2023-08-26 13:08:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484417233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:42,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:42,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:08:42,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42053551] [2023-08-26 13:08:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:08:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:08:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:08:42,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-26 13:08:42,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:42,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-26 13:08:42,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:42,528 INFO L124 PetriNetUnfolderBase]: 49/100 cut-off events. [2023-08-26 13:08:42,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:42,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 100 events. 49/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 222 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 211. Up to 100 conditions per place. [2023-08-26 13:08:42,529 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:08:42,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 79 flow [2023-08-26 13:08:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-26 13:08:42,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2023-08-26 13:08:42,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-26 13:08:42,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-26 13:08:42,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:42,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-26 13:08:42,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,533 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 47 flow. Second operand 3 states and 300 transitions. [2023-08-26 13:08:42,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 79 flow [2023-08-26 13:08:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:42,534 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 46 flow [2023-08-26 13:08:42,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-26 13:08:42,535 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:08:42,535 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 46 flow [2023-08-26 13:08:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:42,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:08:42,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:08:42,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1006762994, now seen corresponding path program 1 times [2023-08-26 13:08:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863964954] [2023-08-26 13:08:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:42,603 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 13:08:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863964954] [2023-08-26 13:08:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863964954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:42,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:08:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092117331] [2023-08-26 13:08:42,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:42,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:42,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:42,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 245 [2023-08-26 13:08:42,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:42,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 245 [2023-08-26 13:08:42,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:42,642 INFO L124 PetriNetUnfolderBase]: 37/80 cut-off events. [2023-08-26 13:08:42,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:08:42,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 80 events. 37/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 149 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 172. Up to 80 conditions per place. [2023-08-26 13:08:42,643 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:08:42,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 16 transitions, 76 flow [2023-08-26 13:08:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:08:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:08:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2023-08-26 13:08:42,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37006802721088433 [2023-08-26 13:08:42,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2023-08-26 13:08:42,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2023-08-26 13:08:42,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:42,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2023-08-26 13:08:42,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:08:42,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,647 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 46 flow. Second operand 3 states and 272 transitions. [2023-08-26 13:08:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 16 transitions, 76 flow [2023-08-26 13:08:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:42,648 INFO L231 Difference]: Finished difference. Result has 28 places, 16 transitions, 45 flow [2023-08-26 13:08:42,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=28, PETRI_TRANSITIONS=16} [2023-08-26 13:08:42,649 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:08:42,649 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 16 transitions, 45 flow [2023-08-26 13:08:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:42,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:42,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:08:42,649 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 13:08:42,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1326750258, now seen corresponding path program 1 times [2023-08-26 13:08:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39631088] [2023-08-26 13:08:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:43,710 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 13:08:43,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39631088] [2023-08-26 13:08:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39631088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:43,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:43,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:43,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050558547] [2023-08-26 13:08:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:43,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:43,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:43,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:43,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 16 transitions, 45 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:43,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:43,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:43,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:43,893 INFO L124 PetriNetUnfolderBase]: 40/106 cut-off events. [2023-08-26 13:08:43,893 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:08:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 40/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 340 event pairs, 7 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 226. Up to 48 conditions per place. [2023-08-26 13:08:43,894 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 28 selfloop transitions, 2 changer transitions 9/39 dead transitions. [2023-08-26 13:08:43,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 178 flow [2023-08-26 13:08:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 525 transitions. [2023-08-26 13:08:43,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 13:08:43,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 525 transitions. [2023-08-26 13:08:43,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 525 transitions. [2023-08-26 13:08:43,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:43,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 525 transitions. [2023-08-26 13:08:43,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:43,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:43,900 INFO L175 Difference]: Start difference. First operand has 28 places, 16 transitions, 45 flow. Second operand 5 states and 525 transitions. [2023-08-26 13:08:43,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 178 flow [2023-08-26 13:08:43,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:08:43,901 INFO L231 Difference]: Finished difference. Result has 34 places, 17 transitions, 59 flow [2023-08-26 13:08:43,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=34, PETRI_TRANSITIONS=17} [2023-08-26 13:08:43,902 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-26 13:08:43,902 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 17 transitions, 59 flow [2023-08-26 13:08:43,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:43,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:43,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:43,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:08:43,903 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 13:08:43,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1977754234, now seen corresponding path program 2 times [2023-08-26 13:08:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477891605] [2023-08-26 13:08:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:44,947 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 13:08:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:44,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477891605] [2023-08-26 13:08:44,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477891605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:44,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:44,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771882676] [2023-08-26 13:08:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:44,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:44,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:44,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 17 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:44,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:44,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:45,177 INFO L124 PetriNetUnfolderBase]: 34/110 cut-off events. [2023-08-26 13:08:45,177 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-26 13:08:45,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 110 events. 34/110 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 11 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 293. Up to 54 conditions per place. [2023-08-26 13:08:45,178 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 28 selfloop transitions, 3 changer transitions 7/38 dead transitions. [2023-08-26 13:08:45,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 195 flow [2023-08-26 13:08:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-08-26 13:08:45,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269387755102041 [2023-08-26 13:08:45,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-08-26 13:08:45,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-08-26 13:08:45,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:45,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-08-26 13:08:45,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:45,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:45,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:45,183 INFO L175 Difference]: Start difference. First operand has 34 places, 17 transitions, 59 flow. Second operand 5 states and 523 transitions. [2023-08-26 13:08:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 195 flow [2023-08-26 13:08:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 188 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 13:08:45,185 INFO L231 Difference]: Finished difference. Result has 38 places, 18 transitions, 76 flow [2023-08-26 13:08:45,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=38, PETRI_TRANSITIONS=18} [2023-08-26 13:08:45,186 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-26 13:08:45,186 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 18 transitions, 76 flow [2023-08-26 13:08:45,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:45,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:45,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:45,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:08:45,187 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 13:08:45,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1918437166, now seen corresponding path program 3 times [2023-08-26 13:08:45,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:45,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955478383] [2023-08-26 13:08:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:08:46,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:46,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955478383] [2023-08-26 13:08:46,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955478383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:46,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:46,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:46,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942777313] [2023-08-26 13:08:46,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:46,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:46,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:46,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 18 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:46,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:46,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:46,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:46,242 INFO L124 PetriNetUnfolderBase]: 35/115 cut-off events. [2023-08-26 13:08:46,242 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-08-26 13:08:46,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 115 events. 35/115 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 431 event pairs, 10 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 365. Up to 62 conditions per place. [2023-08-26 13:08:46,243 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 26 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-08-26 13:08:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 223 flow [2023-08-26 13:08:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-08-26 13:08:46,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269387755102041 [2023-08-26 13:08:46,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-08-26 13:08:46,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-08-26 13:08:46,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:46,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-08-26 13:08:46,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:46,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:46,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:46,252 INFO L175 Difference]: Start difference. First operand has 38 places, 18 transitions, 76 flow. Second operand 5 states and 523 transitions. [2023-08-26 13:08:46,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 223 flow [2023-08-26 13:08:46,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 212 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 13:08:46,254 INFO L231 Difference]: Finished difference. Result has 42 places, 18 transitions, 83 flow [2023-08-26 13:08:46,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=18} [2023-08-26 13:08:46,256 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-26 13:08:46,256 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 18 transitions, 83 flow [2023-08-26 13:08:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:46,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:46,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:46,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:08:46,258 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 13:08:46,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2076872412, now seen corresponding path program 4 times [2023-08-26 13:08:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:46,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743097343] [2023-08-26 13:08:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:47,274 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 13:08:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743097343] [2023-08-26 13:08:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743097343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:47,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325220264] [2023-08-26 13:08:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:47,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:47,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:47,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 18 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:47,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:47,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:47,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:47,566 INFO L124 PetriNetUnfolderBase]: 28/94 cut-off events. [2023-08-26 13:08:47,566 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-26 13:08:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 94 events. 28/94 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 281 event pairs, 16 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 332. Up to 52 conditions per place. [2023-08-26 13:08:47,567 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 28 selfloop transitions, 3 changer transitions 9/40 dead transitions. [2023-08-26 13:08:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 243 flow [2023-08-26 13:08:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-08-26 13:08:47,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269387755102041 [2023-08-26 13:08:47,570 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-08-26 13:08:47,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-08-26 13:08:47,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:47,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-08-26 13:08:47,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:47,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:47,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:47,574 INFO L175 Difference]: Start difference. First operand has 42 places, 18 transitions, 83 flow. Second operand 5 states and 523 transitions. [2023-08-26 13:08:47,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 243 flow [2023-08-26 13:08:47,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 224 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-26 13:08:47,576 INFO L231 Difference]: Finished difference. Result has 44 places, 18 transitions, 90 flow [2023-08-26 13:08:47,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=18} [2023-08-26 13:08:47,577 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-26 13:08:47,577 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 18 transitions, 90 flow [2023-08-26 13:08:47,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:47,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:47,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:47,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:08:47,578 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 13:08:47,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2144817182, now seen corresponding path program 5 times [2023-08-26 13:08:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422720392] [2023-08-26 13:08:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:48,551 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 13:08:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422720392] [2023-08-26 13:08:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422720392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313661088] [2023-08-26 13:08:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:48,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:48,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:48,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 18 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:48,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:48,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:48,836 INFO L124 PetriNetUnfolderBase]: 21/69 cut-off events. [2023-08-26 13:08:48,837 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-08-26 13:08:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 69 events. 21/69 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 168 event pairs, 7 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 262. Up to 29 conditions per place. [2023-08-26 13:08:48,837 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 18 selfloop transitions, 1 changer transitions 18/37 dead transitions. [2023-08-26 13:08:48,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 216 flow [2023-08-26 13:08:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 522 transitions. [2023-08-26 13:08:48,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42612244897959184 [2023-08-26 13:08:48,839 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 522 transitions. [2023-08-26 13:08:48,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 522 transitions. [2023-08-26 13:08:48,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:48,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 522 transitions. [2023-08-26 13:08:48,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:48,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:48,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:48,843 INFO L175 Difference]: Start difference. First operand has 44 places, 18 transitions, 90 flow. Second operand 5 states and 522 transitions. [2023-08-26 13:08:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 216 flow [2023-08-26 13:08:48,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 204 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 13:08:48,844 INFO L231 Difference]: Finished difference. Result has 45 places, 16 transitions, 69 flow [2023-08-26 13:08:48,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=69, PETRI_PLACES=45, PETRI_TRANSITIONS=16} [2023-08-26 13:08:48,845 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-26 13:08:48,845 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 16 transitions, 69 flow [2023-08-26 13:08:48,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:48,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:08:48,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:48,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:08:48,846 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 13:08:48,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:08:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1327800640, now seen corresponding path program 6 times [2023-08-26 13:08:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:08:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032588978] [2023-08-26 13:08:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:08:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:08:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:08:49,724 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 13:08:49,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:08:49,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032588978] [2023-08-26 13:08:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032588978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:08:49,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:08:49,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:08:49,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145444135] [2023-08-26 13:08:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:08:49,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:08:49,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:08:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:08:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:08:49,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-08-26 13:08:49,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 16 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:49,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:08:49,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-08-26 13:08:49,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:08:49,941 INFO L124 PetriNetUnfolderBase]: 10/38 cut-off events. [2023-08-26 13:08:49,941 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-26 13:08:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 38 events. 10/38 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 5 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 141. Up to 21 conditions per place. [2023-08-26 13:08:49,941 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-26 13:08:49,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 23 transitions, 135 flow [2023-08-26 13:08:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:08:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:08:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 509 transitions. [2023-08-26 13:08:49,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41551020408163264 [2023-08-26 13:08:49,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 509 transitions. [2023-08-26 13:08:49,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 509 transitions. [2023-08-26 13:08:49,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:08:49,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 509 transitions. [2023-08-26 13:08:49,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:49,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:49,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:49,947 INFO L175 Difference]: Start difference. First operand has 45 places, 16 transitions, 69 flow. Second operand 5 states and 509 transitions. [2023-08-26 13:08:49,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 23 transitions, 135 flow [2023-08-26 13:08:49,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 117 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-26 13:08:49,948 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 13:08:49,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=5, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-26 13:08:49,948 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-26 13:08:49,948 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 13:08:49,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:08:49,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-26 13:08:49,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:08:49,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:08:49,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:08:49,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (3 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:08:49,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:08:49,953 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:08:49,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:08:49,953 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:08:49,955 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:08:49,955 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:08:49,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:08:49 BasicIcfg [2023-08-26 13:08:49,958 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:08:49,958 INFO L158 Benchmark]: Toolchain (without parser) took 15978.23ms. Allocated memory was 356.5MB in the beginning and 664.8MB in the end (delta: 308.3MB). Free memory was 331.5MB in the beginning and 466.0MB in the end (delta: -134.5MB). Peak memory consumption was 175.4MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,958 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 333.9MB in the beginning and 333.8MB in the end (delta: 91.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:08:49,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.82ms. Allocated memory is still 356.5MB. Free memory was 331.5MB in the beginning and 320.5MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.86ms. Allocated memory is still 356.5MB. Free memory was 320.5MB in the beginning and 317.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,959 INFO L158 Benchmark]: Boogie Preprocessor took 23.89ms. Allocated memory is still 356.5MB. Free memory was 317.7MB in the beginning and 316.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,959 INFO L158 Benchmark]: RCFGBuilder took 796.14ms. Allocated memory is still 356.5MB. Free memory was 316.3MB in the beginning and 247.6MB in the end (delta: 68.6MB). Peak memory consumption was 69.2MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,960 INFO L158 Benchmark]: TraceAbstraction took 14912.98ms. Allocated memory was 356.5MB in the beginning and 664.8MB in the end (delta: 308.3MB). Free memory was 247.1MB in the beginning and 466.0MB in the end (delta: -218.9MB). Peak memory consumption was 91.5MB. Max. memory is 16.0GB. [2023-08-26 13:08:49,961 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 333.9MB in the beginning and 333.8MB in the end (delta: 91.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 204.82ms. Allocated memory is still 356.5MB. Free memory was 331.5MB in the beginning and 320.5MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.86ms. Allocated memory is still 356.5MB. Free memory was 320.5MB in the beginning and 317.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.89ms. Allocated memory is still 356.5MB. Free memory was 317.7MB in the beginning and 316.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 796.14ms. Allocated memory is still 356.5MB. Free memory was 316.3MB in the beginning and 247.6MB in the end (delta: 68.6MB). Peak memory consumption was 69.2MB. Max. memory is 16.0GB. * TraceAbstraction took 14912.98ms. Allocated memory was 356.5MB in the beginning and 664.8MB in the end (delta: 308.3MB). Free memory was 247.1MB in the beginning and 466.0MB in the end (delta: -218.9MB). Peak memory consumption was 91.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 122 PlacesBefore, 38 PlacesAfterwards, 113 TransitionsBefore, 28 TransitionsAfterwards, 378 CoEnabledTransitionPairs, 7 FixpointIterations, 80 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 118 TotalNumberOfCompositions, 626 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 626, independent: 626, independent conditional: 0, independent unconditional: 626, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 225, independent: 225, independent conditional: 0, independent unconditional: 225, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 626, independent: 401, independent conditional: 0, independent unconditional: 401, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 225, unknown conditional: 0, unknown unconditional: 225] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 36, Positive conditional cache size: 0, Positive unconditional cache size: 36, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, 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, 142 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: 14.8s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 229 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 229 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 690 IncrementalHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 690 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=11, InterpolantAutomatonStates: 50, 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, 6.0s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 3452 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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 13:08:49,983 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...