/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/stack-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:39:43,947 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:39:44,031 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 11:39:44,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:39:44,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:39:44,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:39:44,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:39:44,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:39:44,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:39:44,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:39:44,079 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:39:44,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:39:44,079 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:39:44,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:39:44,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:39:44,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:39:44,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:39:44,081 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:39:44,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:39:44,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:39:44,082 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:39:44,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:39:44,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:39:44,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:39:44,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:39:44,084 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:39:44,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:39:44,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:39:44,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:39:44,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:39:44,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:39:44,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:39:44,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:39:44,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:39:44,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:39:44,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:39:44,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:39:44,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:39:44,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:39:44,374 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:39:44,374 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:39:44,375 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-26 11:39:45,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:39:45,751 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:39:45,751 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-26 11:39:45,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d215a864/59f4717b02094177a2061af2b8b75421/FLAG6f74bd327 [2023-08-26 11:39:45,794 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d215a864/59f4717b02094177a2061af2b8b75421 [2023-08-26 11:39:45,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:39:45,797 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:39:45,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:39:45,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:39:45,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:39:45,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:39:45" (1/1) ... [2023-08-26 11:39:45,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfdb247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:45, skipping insertion in model container [2023-08-26 11:39:45,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:39:45" (1/1) ... [2023-08-26 11:39:45,850 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:39:46,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:39:46,224 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:39:46,252 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:39:46,253 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:39:46,259 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 11:39:46,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:39:46,358 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:39:46,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46 WrapperNode [2023-08-26 11:39:46,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:39:46,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:39:46,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:39:46,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:39:46,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,399 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,433 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 166 [2023-08-26 11:39:46,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:39:46,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:39:46,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:39:46,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:39:46,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:39:46,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:39:46,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:39:46,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:39:46,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (1/1) ... [2023-08-26 11:39:46,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:39:46,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:39:46,521 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 11:39:46,542 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 11:39:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:39:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:39:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:39:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:39:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:39:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:39:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:39:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:39:46,559 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 11:39:46,704 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:39:46,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:39:47,060 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:39:47,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:39:47,067 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:39:47,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:39:47 BoogieIcfgContainer [2023-08-26 11:39:47,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:39:47,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:39:47,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:39:47,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:39:47,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:39:45" (1/3) ... [2023-08-26 11:39:47,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f28d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:39:47, skipping insertion in model container [2023-08-26 11:39:47,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:39:46" (2/3) ... [2023-08-26 11:39:47,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f28d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:39:47, skipping insertion in model container [2023-08-26 11:39:47,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:39:47" (3/3) ... [2023-08-26 11:39:47,081 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-26 11:39:47,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:39:47,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 11:39:47,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:39:47,199 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:39:47,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 182 transitions, 380 flow [2023-08-26 11:39:47,297 INFO L124 PetriNetUnfolderBase]: 12/180 cut-off events. [2023-08-26 11:39:47,297 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:39:47,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 180 events. 12/180 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 481 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2023-08-26 11:39:47,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 182 transitions, 380 flow [2023-08-26 11:39:47,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 171 transitions, 351 flow [2023-08-26 11:39:47,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:39:47,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 171 transitions, 351 flow [2023-08-26 11:39:47,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 171 transitions, 351 flow [2023-08-26 11:39:47,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 171 transitions, 351 flow [2023-08-26 11:39:47,351 INFO L124 PetriNetUnfolderBase]: 12/171 cut-off events. [2023-08-26 11:39:47,351 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:39:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 171 events. 12/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 405 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2023-08-26 11:39:47,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 9822 [2023-08-26 11:39:52,272 INFO L134 LiptonReduction]: Checked pairs total: 15104 [2023-08-26 11:39:52,272 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-26 11:39:52,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:39:52,289 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;@3b51c811, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:39:52,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 11:39:52,291 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:39:52,291 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:39:52,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:39:52,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:52,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:39:52,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:52,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 762, now seen corresponding path program 1 times [2023-08-26 11:39:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:52,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867680616] [2023-08-26 11:39:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:52,383 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 11:39:52,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:52,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867680616] [2023-08-26 11:39:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867680616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:52,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:39:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481456793] [2023-08-26 11:39:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:52,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:39:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:39:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:39:52,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 368 [2023-08-26 11:39:52,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:52,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 368 [2023-08-26 11:39:52,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:52,740 INFO L124 PetriNetUnfolderBase]: 1555/2392 cut-off events. [2023-08-26 11:39:52,740 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-26 11:39:52,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4830 conditions, 2392 events. 1555/2392 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11019 event pairs, 1267 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 4566. Up to 2393 conditions per place. [2023-08-26 11:39:52,757 INFO L140 encePairwiseOnDemand]: 366/368 looper letters, 43 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 11:39:52,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 181 flow [2023-08-26 11:39:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:39:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:39:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 383 transitions. [2023-08-26 11:39:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203804347826086 [2023-08-26 11:39:52,778 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 383 transitions. [2023-08-26 11:39:52,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 383 transitions. [2023-08-26 11:39:52,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:52,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 383 transitions. [2023-08-26 11:39:52,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,791 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,793 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 2 states and 383 transitions. [2023-08-26 11:39:52,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 181 flow [2023-08-26 11:39:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:39:52,799 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 90 flow [2023-08-26 11:39:52,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-26 11:39:52,804 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 11:39:52,804 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 90 flow [2023-08-26 11:39:52,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:52,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:39:52,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:39:52,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:52,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 748780, now seen corresponding path program 1 times [2023-08-26 11:39:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194270458] [2023-08-26 11:39:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:52,945 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 11:39:52,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194270458] [2023-08-26 11:39:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194270458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:52,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:52,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:39:52,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573757862] [2023-08-26 11:39:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:52,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 368 [2023-08-26 11:39:52,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:52,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:52,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 368 [2023-08-26 11:39:52,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:53,124 INFO L124 PetriNetUnfolderBase]: 1525/2335 cut-off events. [2023-08-26 11:39:53,125 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:39:53,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 2335 events. 1525/2335 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10663 event pairs, 1242 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 4697. Up to 2335 conditions per place. [2023-08-26 11:39:53,135 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 11:39:53,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 168 flow [2023-08-26 11:39:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-26 11:39:53,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302536231884058 [2023-08-26 11:39:53,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-26 11:39:53,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-26 11:39:53,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:53,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-26 11:39:53,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,142 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 90 flow. Second operand 3 states and 475 transitions. [2023-08-26 11:39:53,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 168 flow [2023-08-26 11:39:53,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:39:53,144 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 88 flow [2023-08-26 11:39:53,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-26 11:39:53,145 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 11:39:53,145 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 88 flow [2023-08-26 11:39:53,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:53,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:39:53,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:39:53,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:53,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 748781, now seen corresponding path program 1 times [2023-08-26 11:39:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964804378] [2023-08-26 11:39:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:53,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:53,278 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 11:39:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964804378] [2023-08-26 11:39:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964804378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:39:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562106654] [2023-08-26 11:39:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 368 [2023-08-26 11:39:53,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:53,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 368 [2023-08-26 11:39:53,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:53,455 INFO L124 PetriNetUnfolderBase]: 1495/2278 cut-off events. [2023-08-26 11:39:53,455 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:39:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4588 conditions, 2278 events. 1495/2278 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10290 event pairs, 1217 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 4584. Up to 2278 conditions per place. [2023-08-26 11:39:53,467 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 38 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 11:39:53,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 162 flow [2023-08-26 11:39:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-26 11:39:53,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338768115942029 [2023-08-26 11:39:53,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-26 11:39:53,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-26 11:39:53,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:53,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-26 11:39:53,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,475 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 88 flow. Second operand 3 states and 479 transitions. [2023-08-26 11:39:53,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 162 flow [2023-08-26 11:39:53,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:53,477 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 85 flow [2023-08-26 11:39:53,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-26 11:39:53,478 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:39:53,478 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 85 flow [2023-08-26 11:39:53,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:53,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:39:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:39:53,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:53,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 719596989, now seen corresponding path program 1 times [2023-08-26 11:39:53,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:53,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788635284] [2023-08-26 11:39:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:53,637 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 11:39:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788635284] [2023-08-26 11:39:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788635284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:39:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564162858] [2023-08-26 11:39:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:39:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:39:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:39:53,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 368 [2023-08-26 11:39:53,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:53,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 368 [2023-08-26 11:39:53,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:53,830 INFO L124 PetriNetUnfolderBase]: 1091/1692 cut-off events. [2023-08-26 11:39:53,830 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:39:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3417 conditions, 1692 events. 1091/1692 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7347 event pairs, 880 based on Foata normal form. 0/1044 useless extension candidates. Maximal degree in co-relation 3413. Up to 1692 conditions per place. [2023-08-26 11:39:53,839 INFO L140 encePairwiseOnDemand]: 366/368 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 11:39:53,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 159 flow [2023-08-26 11:39:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-26 11:39:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421195652173913 [2023-08-26 11:39:53,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-26 11:39:53,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-26 11:39:53,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:53,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-26 11:39:53,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,847 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 85 flow. Second operand 3 states and 465 transitions. [2023-08-26 11:39:53,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 159 flow [2023-08-26 11:39:53,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:53,849 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 84 flow [2023-08-26 11:39:53,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-26 11:39:53,851 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:39:53,851 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 84 flow [2023-08-26 11:39:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:53,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:39:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:39:53,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:53,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 719596990, now seen corresponding path program 1 times [2023-08-26 11:39:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512438071] [2023-08-26 11:39:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:53,973 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 11:39:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:53,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512438071] [2023-08-26 11:39:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512438071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:53,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:39:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948079042] [2023-08-26 11:39:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:39:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:39:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:39:53,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 368 [2023-08-26 11:39:53,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:53,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:53,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 368 [2023-08-26 11:39:53,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:54,093 INFO L124 PetriNetUnfolderBase]: 687/1106 cut-off events. [2023-08-26 11:39:54,093 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:39:54,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 1106 events. 687/1106 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4604 event pairs, 543 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 2242. Up to 1106 conditions per place. [2023-08-26 11:39:54,103 INFO L140 encePairwiseOnDemand]: 366/368 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 11:39:54,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 156 flow [2023-08-26 11:39:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-26 11:39:54,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41757246376811596 [2023-08-26 11:39:54,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-26 11:39:54,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-26 11:39:54,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:54,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-26 11:39:54,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,109 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 84 flow. Second operand 3 states and 461 transitions. [2023-08-26 11:39:54,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 156 flow [2023-08-26 11:39:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:54,111 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 83 flow [2023-08-26 11:39:54,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-26 11:39:54,113 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:39:54,113 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 83 flow [2023-08-26 11:39:54,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:54,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:39:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:39:54,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:54,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash 832009509, now seen corresponding path program 1 times [2023-08-26 11:39:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:54,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606631402] [2023-08-26 11:39:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:54,159 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 11:39:54,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:54,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606631402] [2023-08-26 11:39:54,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606631402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:54,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:54,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:39:54,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16088153] [2023-08-26 11:39:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:54,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 368 [2023-08-26 11:39:54,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:54,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 368 [2023-08-26 11:39:54,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:54,354 INFO L124 PetriNetUnfolderBase]: 1159/1868 cut-off events. [2023-08-26 11:39:54,355 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 11:39:54,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 1868 events. 1159/1868 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8373 event pairs, 342 based on Foata normal form. 0/1354 useless extension candidates. Maximal degree in co-relation 3785. Up to 1118 conditions per place. [2023-08-26 11:39:54,364 INFO L140 encePairwiseOnDemand]: 363/368 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-26 11:39:54,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 280 flow [2023-08-26 11:39:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-26 11:39:54,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936594202898551 [2023-08-26 11:39:54,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-26 11:39:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-26 11:39:54,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:54,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-26 11:39:54,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,371 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 83 flow. Second operand 3 states and 545 transitions. [2023-08-26 11:39:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 280 flow [2023-08-26 11:39:54,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:54,373 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 112 flow [2023-08-26 11:39:54,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-26 11:39:54,373 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-08-26 11:39:54,374 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 112 flow [2023-08-26 11:39:54,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:54,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:39:54,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:39:54,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:54,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash 832008134, now seen corresponding path program 1 times [2023-08-26 11:39:54,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:54,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429725881] [2023-08-26 11:39:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:54,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:54,575 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 11:39:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:54,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429725881] [2023-08-26 11:39:54,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429725881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:54,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:54,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:39:54,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658943289] [2023-08-26 11:39:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:39:54,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:39:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:39:54,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 368 [2023-08-26 11:39:54,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:54,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 368 [2023-08-26 11:39:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:54,946 INFO L124 PetriNetUnfolderBase]: 1455/2340 cut-off events. [2023-08-26 11:39:54,946 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-08-26 11:39:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5102 conditions, 2340 events. 1455/2340 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10761 event pairs, 313 based on Foata normal form. 0/1820 useless extension candidates. Maximal degree in co-relation 5097. Up to 1815 conditions per place. [2023-08-26 11:39:54,957 INFO L140 encePairwiseOnDemand]: 362/368 looper letters, 89 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2023-08-26 11:39:54,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 445 flow [2023-08-26 11:39:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:39:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:39:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 744 transitions. [2023-08-26 11:39:54,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043478260869565 [2023-08-26 11:39:54,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 744 transitions. [2023-08-26 11:39:54,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 744 transitions. [2023-08-26 11:39:54,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:54,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 744 transitions. [2023-08-26 11:39:54,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,964 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,965 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 112 flow. Second operand 5 states and 744 transitions. [2023-08-26 11:39:54,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 445 flow [2023-08-26 11:39:54,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 96 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:39:54,968 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 157 flow [2023-08-26 11:39:54,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-26 11:39:54,969 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-26 11:39:54,969 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 157 flow [2023-08-26 11:39:54,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:54,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:54,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:39:54,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:39:54,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:54,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash 832008133, now seen corresponding path program 1 times [2023-08-26 11:39:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:54,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137277596] [2023-08-26 11:39:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:54,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:55,053 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 11:39:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137277596] [2023-08-26 11:39:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137277596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:55,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:39:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374780860] [2023-08-26 11:39:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:55,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:39:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:39:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:39:55,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 368 [2023-08-26 11:39:55,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:55,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 368 [2023-08-26 11:39:55,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:55,348 INFO L124 PetriNetUnfolderBase]: 1640/2631 cut-off events. [2023-08-26 11:39:55,349 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2023-08-26 11:39:55,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 2631 events. 1640/2631 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12606 event pairs, 529 based on Foata normal form. 0/2257 useless extension candidates. Maximal degree in co-relation 6057. Up to 1851 conditions per place. [2023-08-26 11:39:55,364 INFO L140 encePairwiseOnDemand]: 363/368 looper letters, 87 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-08-26 11:39:55,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 93 transitions, 468 flow [2023-08-26 11:39:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:39:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:39:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 766 transitions. [2023-08-26 11:39:55,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41630434782608694 [2023-08-26 11:39:55,367 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 766 transitions. [2023-08-26 11:39:55,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 766 transitions. [2023-08-26 11:39:55,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:55,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 766 transitions. [2023-08-26 11:39:55,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,372 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,372 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 157 flow. Second operand 5 states and 766 transitions. [2023-08-26 11:39:55,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 93 transitions, 468 flow [2023-08-26 11:39:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 468 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:39:55,376 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 193 flow [2023-08-26 11:39:55,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-26 11:39:55,377 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-08-26 11:39:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 193 flow [2023-08-26 11:39:55,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:55,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:39:55,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:55,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1638420307, now seen corresponding path program 1 times [2023-08-26 11:39:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891328554] [2023-08-26 11:39:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:55,415 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 11:39:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:55,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891328554] [2023-08-26 11:39:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891328554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:55,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:39:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120114316] [2023-08-26 11:39:55,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:55,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:55,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 368 [2023-08-26 11:39:55,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:55,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 368 [2023-08-26 11:39:55,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:55,589 INFO L124 PetriNetUnfolderBase]: 1134/1839 cut-off events. [2023-08-26 11:39:55,589 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2023-08-26 11:39:55,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4357 conditions, 1839 events. 1134/1839 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7916 event pairs, 521 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 4346. Up to 1540 conditions per place. [2023-08-26 11:39:55,629 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 53 selfloop transitions, 2 changer transitions 3/58 dead transitions. [2023-08-26 11:39:55,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 301 flow [2023-08-26 11:39:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-08-26 11:39:55,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990942028985507 [2023-08-26 11:39:55,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-08-26 11:39:55,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-08-26 11:39:55,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:55,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-08-26 11:39:55,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,636 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 193 flow. Second operand 3 states and 551 transitions. [2023-08-26 11:39:55,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 301 flow [2023-08-26 11:39:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 284 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 11:39:55,640 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 145 flow [2023-08-26 11:39:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-26 11:39:55,643 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2023-08-26 11:39:55,643 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 145 flow [2023-08-26 11:39:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:55,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:55,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:39:55,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:55,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1295147576, now seen corresponding path program 1 times [2023-08-26 11:39:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:55,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251952809] [2023-08-26 11:39:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:55,696 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 11:39:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251952809] [2023-08-26 11:39:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251952809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:55,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:55,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:39:55,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558791729] [2023-08-26 11:39:55,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:55,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:55,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:55,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:55,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 368 [2023-08-26 11:39:55,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:55,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 368 [2023-08-26 11:39:55,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:55,891 INFO L124 PetriNetUnfolderBase]: 1196/1937 cut-off events. [2023-08-26 11:39:55,891 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-08-26 11:39:55,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4563 conditions, 1937 events. 1196/1937 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8504 event pairs, 866 based on Foata normal form. 60/1821 useless extension candidates. Maximal degree in co-relation 4554. Up to 1782 conditions per place. [2023-08-26 11:39:55,901 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 60 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2023-08-26 11:39:55,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 333 flow [2023-08-26 11:39:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-26 11:39:55,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2023-08-26 11:39:55,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-26 11:39:55,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-26 11:39:55,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:55,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-26 11:39:55,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,908 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 145 flow. Second operand 3 states and 546 transitions. [2023-08-26 11:39:55,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 333 flow [2023-08-26 11:39:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:55,910 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 166 flow [2023-08-26 11:39:55,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-26 11:39:55,911 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-08-26 11:39:55,911 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 166 flow [2023-08-26 11:39:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:55,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:55,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:39:55,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:55,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 928983282, now seen corresponding path program 1 times [2023-08-26 11:39:55,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:55,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221847842] [2023-08-26 11:39:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:55,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:39:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221847842] [2023-08-26 11:39:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221847842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:39:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837352773] [2023-08-26 11:39:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:56,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:39:56,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:39:56,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:39:56,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 11:39:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:56,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-26 11:39:56,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:39:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:39:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:39:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:39:56,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 11:39:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:39:56,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:39:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:39:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837352773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:39:56,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:39:56,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 11:39:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896755309] [2023-08-26 11:39:56,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:39:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 11:39:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 11:39:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 11:39:56,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 368 [2023-08-26 11:39:56,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 166 flow. Second operand has 21 states, 21 states have (on average 130.0) internal successors, (2730), 21 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:56,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:56,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 368 [2023-08-26 11:39:56,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:58,335 INFO L124 PetriNetUnfolderBase]: 2895/4666 cut-off events. [2023-08-26 11:39:58,335 INFO L125 PetriNetUnfolderBase]: For 1978/1978 co-relation queries the response was YES. [2023-08-26 11:39:58,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11560 conditions, 4666 events. 2895/4666 cut-off events. For 1978/1978 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 23513 event pairs, 480 based on Foata normal form. 102/4352 useless extension candidates. Maximal degree in co-relation 11550. Up to 1791 conditions per place. [2023-08-26 11:39:58,364 INFO L140 encePairwiseOnDemand]: 359/368 looper letters, 211 selfloop transitions, 26 changer transitions 3/240 dead transitions. [2023-08-26 11:39:58,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 240 transitions, 1181 flow [2023-08-26 11:39:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:39:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:39:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2024 transitions. [2023-08-26 11:39:58,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-08-26 11:39:58,370 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2024 transitions. [2023-08-26 11:39:58,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2024 transitions. [2023-08-26 11:39:58,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:58,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2024 transitions. [2023-08-26 11:39:58,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 144.57142857142858) internal successors, (2024), 14 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,383 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 166 flow. Second operand 14 states and 2024 transitions. [2023-08-26 11:39:58,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 240 transitions, 1181 flow [2023-08-26 11:39:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 240 transitions, 1169 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:58,393 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 392 flow [2023-08-26 11:39:58,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=392, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-26 11:39:58,393 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2023-08-26 11:39:58,394 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 392 flow [2023-08-26 11:39:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.0) internal successors, (2730), 21 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:58,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:58,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 11:39:58,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 11:39:58,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:58,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1609661092, now seen corresponding path program 1 times [2023-08-26 11:39:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:58,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820193613] [2023-08-26 11:39:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:58,656 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 11:39:58,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820193613] [2023-08-26 11:39:58,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820193613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:58,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:58,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:39:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527168929] [2023-08-26 11:39:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:58,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:39:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:39:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:39:58,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 368 [2023-08-26 11:39:58,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:58,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 368 [2023-08-26 11:39:58,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:58,843 INFO L124 PetriNetUnfolderBase]: 777/1416 cut-off events. [2023-08-26 11:39:58,843 INFO L125 PetriNetUnfolderBase]: For 1252/1252 co-relation queries the response was YES. [2023-08-26 11:39:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3799 conditions, 1416 events. 777/1416 cut-off events. For 1252/1252 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6217 event pairs, 110 based on Foata normal form. 74/1422 useless extension candidates. Maximal degree in co-relation 3781. Up to 1137 conditions per place. [2023-08-26 11:39:58,851 INFO L140 encePairwiseOnDemand]: 363/368 looper letters, 56 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2023-08-26 11:39:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 63 transitions, 432 flow [2023-08-26 11:39:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:39:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:39:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-26 11:39:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192028985507245 [2023-08-26 11:39:58,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-26 11:39:58,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-26 11:39:58,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:58,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-26 11:39:58,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,857 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 392 flow. Second operand 3 states and 521 transitions. [2023-08-26 11:39:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 63 transitions, 432 flow [2023-08-26 11:39:58,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 402 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-26 11:39:58,863 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 269 flow [2023-08-26 11:39:58,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-08-26 11:39:58,863 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2023-08-26 11:39:58,863 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 269 flow [2023-08-26 11:39:58,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:58,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:58,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:39:58,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:58,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 923522933, now seen corresponding path program 1 times [2023-08-26 11:39:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778034177] [2023-08-26 11:39:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:39:59,189 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 11:39:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:39:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778034177] [2023-08-26 11:39:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778034177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:39:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:39:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:39:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52531413] [2023-08-26 11:39:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:39:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:39:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:39:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:39:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:39:59,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 368 [2023-08-26 11:39:59,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 269 flow. Second operand has 13 states, 13 states have (on average 121.53846153846153) internal successors, (1580), 13 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:59,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:39:59,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 368 [2023-08-26 11:39:59,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:39:59,918 INFO L124 PetriNetUnfolderBase]: 893/1628 cut-off events. [2023-08-26 11:39:59,918 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-08-26 11:39:59,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4336 conditions, 1628 events. 893/1628 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7322 event pairs, 182 based on Foata normal form. 0/1610 useless extension candidates. Maximal degree in co-relation 4320. Up to 1016 conditions per place. [2023-08-26 11:39:59,928 INFO L140 encePairwiseOnDemand]: 356/368 looper letters, 126 selfloop transitions, 14 changer transitions 3/143 dead transitions. [2023-08-26 11:39:59,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 143 transitions, 815 flow [2023-08-26 11:39:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 11:39:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 11:39:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1576 transitions. [2023-08-26 11:39:59,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35688405797101447 [2023-08-26 11:39:59,934 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1576 transitions. [2023-08-26 11:39:59,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1576 transitions. [2023-08-26 11:39:59,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:39:59,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1576 transitions. [2023-08-26 11:39:59,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:59,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:59,948 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:59,948 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 269 flow. Second operand 12 states and 1576 transitions. [2023-08-26 11:39:59,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 143 transitions, 815 flow [2023-08-26 11:39:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 143 transitions, 798 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:39:59,954 INFO L231 Difference]: Finished difference. Result has 81 places, 61 transitions, 341 flow [2023-08-26 11:39:59,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2023-08-26 11:39:59,955 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2023-08-26 11:39:59,955 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 341 flow [2023-08-26 11:39:59,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 121.53846153846153) internal successors, (1580), 13 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:39:59,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:39:59,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:39:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:39:59,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:39:59,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:39:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1422024332, now seen corresponding path program 1 times [2023-08-26 11:39:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:39:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636244206] [2023-08-26 11:39:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:39:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:39:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:00,030 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 11:40:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:00,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636244206] [2023-08-26 11:40:00,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636244206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:00,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:00,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:40:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366667411] [2023-08-26 11:40:00,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:40:00,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:40:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:40:00,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 368 [2023-08-26 11:40:00,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 61 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 136.85714285714286) internal successors, (958), 7 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:00,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 368 [2023-08-26 11:40:00,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:00,341 INFO L124 PetriNetUnfolderBase]: 971/1764 cut-off events. [2023-08-26 11:40:00,341 INFO L125 PetriNetUnfolderBase]: For 880/880 co-relation queries the response was YES. [2023-08-26 11:40:00,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4932 conditions, 1764 events. 971/1764 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8039 event pairs, 126 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 4911. Up to 858 conditions per place. [2023-08-26 11:40:00,353 INFO L140 encePairwiseOnDemand]: 361/368 looper letters, 92 selfloop transitions, 8 changer transitions 3/103 dead transitions. [2023-08-26 11:40:00,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 700 flow [2023-08-26 11:40:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:40:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:40:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1018 transitions. [2023-08-26 11:40:00,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951863354037267 [2023-08-26 11:40:00,356 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1018 transitions. [2023-08-26 11:40:00,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1018 transitions. [2023-08-26 11:40:00,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:00,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1018 transitions. [2023-08-26 11:40:00,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.42857142857142) internal successors, (1018), 7 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,363 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,363 INFO L175 Difference]: Start difference. First operand has 81 places, 61 transitions, 341 flow. Second operand 7 states and 1018 transitions. [2023-08-26 11:40:00,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 700 flow [2023-08-26 11:40:00,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 690 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:00,369 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 377 flow [2023-08-26 11:40:00,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2023-08-26 11:40:00,369 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 37 predicate places. [2023-08-26 11:40:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 377 flow [2023-08-26 11:40:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.85714285714286) internal successors, (958), 7 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:00,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:40:00,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:00,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash -765825911, now seen corresponding path program 1 times [2023-08-26 11:40:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198455062] [2023-08-26 11:40:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:00,972 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 11:40:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198455062] [2023-08-26 11:40:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198455062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 11:40:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88579738] [2023-08-26 11:40:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:00,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:40:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:40:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:40:00,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 368 [2023-08-26 11:40:00,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 377 flow. Second operand has 15 states, 15 states have (on average 114.46666666666667) internal successors, (1717), 15 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:00,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 368 [2023-08-26 11:40:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:02,121 INFO L124 PetriNetUnfolderBase]: 1185/2153 cut-off events. [2023-08-26 11:40:02,121 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2023-08-26 11:40:02,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 2153 events. 1185/2153 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10282 event pairs, 268 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 6154. Up to 1599 conditions per place. [2023-08-26 11:40:02,137 INFO L140 encePairwiseOnDemand]: 351/368 looper letters, 138 selfloop transitions, 29 changer transitions 4/171 dead transitions. [2023-08-26 11:40:02,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 171 transitions, 1083 flow [2023-08-26 11:40:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 11:40:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 11:40:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2183 transitions. [2023-08-26 11:40:02,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32955917874396135 [2023-08-26 11:40:02,144 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2183 transitions. [2023-08-26 11:40:02,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2183 transitions. [2023-08-26 11:40:02,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:02,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2183 transitions. [2023-08-26 11:40:02,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 121.27777777777777) internal successors, (2183), 18 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:02,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 368.0) internal successors, (6992), 19 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:02,159 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 368.0) internal successors, (6992), 19 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:02,159 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 377 flow. Second operand 18 states and 2183 transitions. [2023-08-26 11:40:02,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 171 transitions, 1083 flow [2023-08-26 11:40:02,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1069 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:02,168 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 585 flow [2023-08-26 11:40:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=585, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-08-26 11:40:02,168 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 58 predicate places. [2023-08-26 11:40:02,168 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 585 flow [2023-08-26 11:40:02,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.46666666666667) internal successors, (1717), 15 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:02,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:02,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:40:02,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:02,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -590570555, now seen corresponding path program 2 times [2023-08-26 11:40:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700004454] [2023-08-26 11:40:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:02,910 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 11:40:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700004454] [2023-08-26 11:40:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700004454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:02,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:02,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:40:02,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684526383] [2023-08-26 11:40:02,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:02,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:02,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:40:02,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 368 [2023-08-26 11:40:02,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 585 flow. Second operand has 16 states, 16 states have (on average 106.375) internal successors, (1702), 16 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:02,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:02,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 368 [2023-08-26 11:40:02,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:04,044 INFO L124 PetriNetUnfolderBase]: 1383/2512 cut-off events. [2023-08-26 11:40:04,044 INFO L125 PetriNetUnfolderBase]: For 1765/1765 co-relation queries the response was YES. [2023-08-26 11:40:04,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7580 conditions, 2512 events. 1383/2512 cut-off events. For 1765/1765 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12516 event pairs, 342 based on Foata normal form. 0/2488 useless extension candidates. Maximal degree in co-relation 7549. Up to 1615 conditions per place. [2023-08-26 11:40:04,063 INFO L140 encePairwiseOnDemand]: 351/368 looper letters, 139 selfloop transitions, 34 changer transitions 3/176 dead transitions. [2023-08-26 11:40:04,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 176 transitions, 1248 flow [2023-08-26 11:40:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1607 transitions. [2023-08-26 11:40:04,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31191770186335405 [2023-08-26 11:40:04,069 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1607 transitions. [2023-08-26 11:40:04,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1607 transitions. [2023-08-26 11:40:04,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:04,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1607 transitions. [2023-08-26 11:40:04,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.78571428571429) internal successors, (1607), 14 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:04,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:04,080 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:04,080 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 585 flow. Second operand 14 states and 1607 transitions. [2023-08-26 11:40:04,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 176 transitions, 1248 flow [2023-08-26 11:40:04,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 176 transitions, 1237 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:04,092 INFO L231 Difference]: Finished difference. Result has 122 places, 98 transitions, 782 flow [2023-08-26 11:40:04,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=98} [2023-08-26 11:40:04,092 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 75 predicate places. [2023-08-26 11:40:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 98 transitions, 782 flow [2023-08-26 11:40:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 106.375) internal successors, (1702), 16 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:04,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:04,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:40:04,093 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:04,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1731379297, now seen corresponding path program 3 times [2023-08-26 11:40:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892326193] [2023-08-26 11:40:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:04,821 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 11:40:04,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:04,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892326193] [2023-08-26 11:40:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892326193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:04,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:04,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:40:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078622881] [2023-08-26 11:40:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:04,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:04,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:40:04,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 368 [2023-08-26 11:40:04,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 98 transitions, 782 flow. Second operand has 16 states, 16 states have (on average 106.375) internal successors, (1702), 16 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:04,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:04,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 368 [2023-08-26 11:40:04,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:05,929 INFO L124 PetriNetUnfolderBase]: 1377/2500 cut-off events. [2023-08-26 11:40:05,930 INFO L125 PetriNetUnfolderBase]: For 2367/2367 co-relation queries the response was YES. [2023-08-26 11:40:05,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8013 conditions, 2500 events. 1377/2500 cut-off events. For 2367/2367 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12374 event pairs, 326 based on Foata normal form. 0/2482 useless extension candidates. Maximal degree in co-relation 7974. Up to 1260 conditions per place. [2023-08-26 11:40:05,950 INFO L140 encePairwiseOnDemand]: 352/368 looper letters, 131 selfloop transitions, 44 changer transitions 3/178 dead transitions. [2023-08-26 11:40:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 1382 flow [2023-08-26 11:40:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1607 transitions. [2023-08-26 11:40:05,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31191770186335405 [2023-08-26 11:40:05,954 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1607 transitions. [2023-08-26 11:40:05,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1607 transitions. [2023-08-26 11:40:05,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:05,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1607 transitions. [2023-08-26 11:40:05,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.78571428571429) internal successors, (1607), 14 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:05,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:05,964 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 368.0) internal successors, (5520), 15 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:05,964 INFO L175 Difference]: Start difference. First operand has 122 places, 98 transitions, 782 flow. Second operand 14 states and 1607 transitions. [2023-08-26 11:40:05,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 1382 flow [2023-08-26 11:40:05,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 178 transitions, 1337 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-26 11:40:05,981 INFO L231 Difference]: Finished difference. Result has 133 places, 103 transitions, 896 flow [2023-08-26 11:40:05,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=896, PETRI_PLACES=133, PETRI_TRANSITIONS=103} [2023-08-26 11:40:05,982 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 86 predicate places. [2023-08-26 11:40:05,982 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 103 transitions, 896 flow [2023-08-26 11:40:05,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 106.375) internal successors, (1702), 16 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:05,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:05,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 11:40:05,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:40:05,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:05,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1981873021, now seen corresponding path program 1 times [2023-08-26 11:40:05,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:05,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057629993] [2023-08-26 11:40:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:06,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057629993] [2023-08-26 11:40:06,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057629993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511869148] [2023-08-26 11:40:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:06,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:06,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:40:06,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 11:40:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:06,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 11:40:06,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:06,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:06,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511869148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:06,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:06,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-26 11:40:06,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932932767] [2023-08-26 11:40:06,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:06,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:40:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:40:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:40:06,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 368 [2023-08-26 11:40:06,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 103 transitions, 896 flow. Second operand has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:06,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:06,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 368 [2023-08-26 11:40:06,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:07,037 INFO L124 PetriNetUnfolderBase]: 1971/3582 cut-off events. [2023-08-26 11:40:07,037 INFO L125 PetriNetUnfolderBase]: For 3990/3990 co-relation queries the response was YES. [2023-08-26 11:40:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11546 conditions, 3582 events. 1971/3582 cut-off events. For 3990/3990 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16641 event pairs, 535 based on Foata normal form. 40/3604 useless extension candidates. Maximal degree in co-relation 11503. Up to 1095 conditions per place. [2023-08-26 11:40:07,066 INFO L140 encePairwiseOnDemand]: 360/368 looper letters, 215 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2023-08-26 11:40:07,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 261 transitions, 2145 flow [2023-08-26 11:40:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 11:40:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 11:40:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2157 transitions. [2023-08-26 11:40:07,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508779264214047 [2023-08-26 11:40:07,070 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2157 transitions. [2023-08-26 11:40:07,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2157 transitions. [2023-08-26 11:40:07,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:07,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2157 transitions. [2023-08-26 11:40:07,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.92307692307693) internal successors, (2157), 13 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:07,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 368.0) internal successors, (5152), 14 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:07,081 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 368.0) internal successors, (5152), 14 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:07,081 INFO L175 Difference]: Start difference. First operand has 133 places, 103 transitions, 896 flow. Second operand 13 states and 2157 transitions. [2023-08-26 11:40:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 261 transitions, 2145 flow [2023-08-26 11:40:07,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 261 transitions, 2078 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-26 11:40:07,104 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 1192 flow [2023-08-26 11:40:07,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1192, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2023-08-26 11:40:07,104 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2023-08-26 11:40:07,104 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 1192 flow [2023-08-26 11:40:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:07,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:07,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:07,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 11:40:07,311 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:07,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530430, now seen corresponding path program 1 times [2023-08-26 11:40:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692613499] [2023-08-26 11:40:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:07,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692613499] [2023-08-26 11:40:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692613499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806281643] [2023-08-26 11:40:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:07,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:07,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:07,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:40:07,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 11:40:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:07,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-26 11:40:07,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:08,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:08,232 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:40:08,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-26 11:40:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806281643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:08,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-26 11:40:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343024256] [2023-08-26 11:40:08,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 11:40:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:08,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 11:40:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-08-26 11:40:08,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 368 [2023-08-26 11:40:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 1192 flow. Second operand has 29 states, 29 states have (on average 122.44827586206897) internal successors, (3551), 29 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:08,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:08,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 368 [2023-08-26 11:40:08,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:11,990 INFO L124 PetriNetUnfolderBase]: 2885/5306 cut-off events. [2023-08-26 11:40:11,990 INFO L125 PetriNetUnfolderBase]: For 8633/8633 co-relation queries the response was YES. [2023-08-26 11:40:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17196 conditions, 5306 events. 2885/5306 cut-off events. For 8633/8633 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 27158 event pairs, 519 based on Foata normal form. 124/5394 useless extension candidates. Maximal degree in co-relation 17147. Up to 1276 conditions per place. [2023-08-26 11:40:12,024 INFO L140 encePairwiseOnDemand]: 354/368 looper letters, 295 selfloop transitions, 104 changer transitions 3/402 dead transitions. [2023-08-26 11:40:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 402 transitions, 3202 flow [2023-08-26 11:40:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-26 11:40:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-26 11:40:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4992 transitions. [2023-08-26 11:40:12,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2023-08-26 11:40:12,033 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4992 transitions. [2023-08-26 11:40:12,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4992 transitions. [2023-08-26 11:40:12,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:12,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4992 transitions. [2023-08-26 11:40:12,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 128.0) internal successors, (4992), 39 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:12,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 368.0) internal successors, (14720), 40 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:12,061 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 368.0) internal successors, (14720), 40 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:12,061 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 1192 flow. Second operand 39 states and 4992 transitions. [2023-08-26 11:40:12,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 402 transitions, 3202 flow [2023-08-26 11:40:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 402 transitions, 3036 flow, removed 83 selfloop flow, removed 0 redundant places. [2023-08-26 11:40:12,097 INFO L231 Difference]: Finished difference. Result has 199 places, 188 transitions, 1995 flow [2023-08-26 11:40:12,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1995, PETRI_PLACES=199, PETRI_TRANSITIONS=188} [2023-08-26 11:40:12,098 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 152 predicate places. [2023-08-26 11:40:12,098 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 188 transitions, 1995 flow [2023-08-26 11:40:12,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 122.44827586206897) internal successors, (3551), 29 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:12,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:12,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:12,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:12,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash 299843104, now seen corresponding path program 1 times [2023-08-26 11:40:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:12,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774260742] [2023-08-26 11:40:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:12,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:40:12,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:40:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:40:12,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:40:12,405 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:40:12,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 11:40:12,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 11:40:12,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 11:40:12,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 11:40:12,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 11:40:12,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONASSERT (7 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 11:40:12,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 11:40:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:40:12,410 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:12,415 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:40:12,415 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:40:12,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:40:12 BasicIcfg [2023-08-26 11:40:12,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:40:12,490 INFO L158 Benchmark]: Toolchain (without parser) took 26693.88ms. Allocated memory was 388.0MB in the beginning and 889.2MB in the end (delta: 501.2MB). Free memory was 362.2MB in the beginning and 632.7MB in the end (delta: -270.5MB). Peak memory consumption was 231.8MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,491 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 388.0MB. Free memory is still 364.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:40:12,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 561.96ms. Allocated memory is still 388.0MB. Free memory was 362.2MB in the beginning and 333.0MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,491 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.26ms. Allocated memory is still 388.0MB. Free memory was 333.0MB in the beginning and 329.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,491 INFO L158 Benchmark]: Boogie Preprocessor took 47.29ms. Allocated memory is still 388.0MB. Free memory was 329.9MB in the beginning and 328.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,492 INFO L158 Benchmark]: RCFGBuilder took 589.12ms. Allocated memory is still 388.0MB. Free memory was 328.3MB in the beginning and 356.4MB in the end (delta: -28.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,492 INFO L158 Benchmark]: TraceAbstraction took 25415.68ms. Allocated memory was 388.0MB in the beginning and 889.2MB in the end (delta: 501.2MB). Free memory was 355.5MB in the beginning and 632.7MB in the end (delta: -277.2MB). Peak memory consumption was 225.8MB. Max. memory is 16.0GB. [2023-08-26 11:40:12,493 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 388.0MB. Free memory is still 364.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 561.96ms. Allocated memory is still 388.0MB. Free memory was 362.2MB in the beginning and 333.0MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 74.26ms. Allocated memory is still 388.0MB. Free memory was 333.0MB in the beginning and 329.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 47.29ms. Allocated memory is still 388.0MB. Free memory was 329.9MB in the beginning and 328.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 589.12ms. Allocated memory is still 388.0MB. Free memory was 328.3MB in the beginning and 356.4MB in the end (delta: -28.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 25415.68ms. Allocated memory was 388.0MB in the beginning and 889.2MB in the end (delta: 501.2MB). Free memory was 355.5MB in the beginning and 632.7MB in the end (delta: -277.2MB). Peak memory consumption was 225.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0s, 166 PlacesBefore, 47 PlacesAfterwards, 171 TransitionsBefore, 45 TransitionsAfterwards, 9822 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 114 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 27 ConcurrentYvCompositions, 7 ChoiceCompositions, 186 TotalNumberOfCompositions, 15104 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11988, independent: 11763, independent conditional: 0, independent unconditional: 11763, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5759, independent: 5700, independent conditional: 0, independent unconditional: 5700, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11988, independent: 6063, independent conditional: 0, independent unconditional: 6063, dependent: 166, dependent conditional: 0, dependent unconditional: 166, unknown: 5759, unknown conditional: 0, unknown unconditional: 5759] , Statistics on independence cache: Total cache size (in pairs): 334, Positive cache size: 314, Positive conditional cache size: 0, Positive unconditional cache size: 314, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 20]: assertion can be violated assertion can be violated We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-3, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-2, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=1, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=1] [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=1, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=1, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] CALL 2 reach_error() [L20] COND FALSE 2 !(0) [L20] 2 __assert_fail ("0", "stack-2.c", 3, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={49:50}, arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 282 locations, 22 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: 25.2s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2471 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2471 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 65 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9452 IncrementalHoareTripleChecker+Invalid, 9517 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 65 mSolverCounterUnsat, 0 mSDtfsCounter, 9452 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1995occurred in iteration=19, InterpolantAutomatonStates: 167, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 327 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 3929 SizeOfPredicates, 24 NumberOfNonLiveVariables, 743 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 25 InterpolantComputations, 16 PerfectInterpolantSequences, 8/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-26 11:40:12,514 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...