/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:22:45,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:22:45,760 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:22:45,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:22:45,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:22:45,797 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:22:45,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:22:45,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:22:45,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:22:45,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:22:45,801 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:22:45,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:22:45,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:22:45,802 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:22:45,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:22:45,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:22:45,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:22:45,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:22:45,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:22:45,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:22:45,804 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:22:45,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:22:45,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:22:45,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:22:45,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:22:45,807 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:22:45,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:22:45,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:45,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:22:45,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:22:45,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:22:45,809 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:22:45,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:22:45,810 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:22:45,810 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:22:45,810 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:22:46,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:22:46,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:22:46,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:22:46,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:22:46,176 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:22:46,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2023-08-26 18:22:47,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:22:47,644 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:22:47,644 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2023-08-26 18:22:47,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e0bb8575/1c9f909da78e445793020436d64b28fe/FLAG2f04e52ad [2023-08-26 18:22:47,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e0bb8575/1c9f909da78e445793020436d64b28fe [2023-08-26 18:22:47,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:22:47,672 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:22:47,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:47,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:22:47,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:22:47,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:47" (1/1) ... [2023-08-26 18:22:47,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e96168d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:47, skipping insertion in model container [2023-08-26 18:22:47,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:47" (1/1) ... [2023-08-26 18:22:47,726 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:22:48,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:48,033 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:22:48,055 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:48,058 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:48,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:48,095 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:48,095 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:48,104 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:22:48,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48 WrapperNode [2023-08-26 18:22:48,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:48,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:48,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:22:48,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:22:48,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,161 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 61 [2023-08-26 18:22:48,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:48,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:22:48,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:22:48,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:22:48,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:22:48,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:22:48,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:22:48,203 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:22:48,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (1/1) ... [2023-08-26 18:22:48,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:22:48,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:22:48,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:22:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:22:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:22:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:22:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:22:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:22:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:22:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:22:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:22:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:22:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:22:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:22:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:22:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:22:48,275 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:22:48,415 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:22:48,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:22:48,602 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:22:48,608 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:22:48,608 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:22:48,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:48 BoogieIcfgContainer [2023-08-26 18:22:48,611 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:22:48,613 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:22:48,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:22:48,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:22:48,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:22:47" (1/3) ... [2023-08-26 18:22:48,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4498139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:48, skipping insertion in model container [2023-08-26 18:22:48,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:48" (2/3) ... [2023-08-26 18:22:48,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4498139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:48, skipping insertion in model container [2023-08-26 18:22:48,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:48" (3/3) ... [2023-08-26 18:22:48,619 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2023-08-26 18:22:48,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:22:48,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 18:22:48,636 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:22:48,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:22:48,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 160 flow [2023-08-26 18:22:48,754 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-26 18:22:48,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:48,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 73 events. 3/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-08-26 18:22:48,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 160 flow [2023-08-26 18:22:48,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 61 transitions, 128 flow [2023-08-26 18:22:48,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:22:48,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 61 transitions, 128 flow [2023-08-26 18:22:48,780 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 61 transitions, 128 flow [2023-08-26 18:22:48,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 61 transitions, 128 flow [2023-08-26 18:22:48,809 INFO L124 PetriNetUnfolderBase]: 1/61 cut-off events. [2023-08-26 18:22:48,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:48,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 61 events. 1/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-08-26 18:22:48,811 INFO L119 LiptonReduction]: Number of co-enabled transitions 612 [2023-08-26 18:22:50,644 INFO L134 LiptonReduction]: Checked pairs total: 1133 [2023-08-26 18:22:50,644 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-26 18:22:50,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:22:50,662 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;@5ff0e4b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:22:50,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 18:22:50,664 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:22:50,664 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:22:50,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:50,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:50,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:22:50,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:50,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 268, now seen corresponding path program 1 times [2023-08-26 18:22:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781278875] [2023-08-26 18:22:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781278875] [2023-08-26 18:22:50,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781278875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:50,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:50,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:22:50,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253438021] [2023-08-26 18:22:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:50,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:22:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:22:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:22:50,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 136 [2023-08-26 18:22:50,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:50,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:50,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 136 [2023-08-26 18:22:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:50,850 INFO L124 PetriNetUnfolderBase]: 32/71 cut-off events. [2023-08-26 18:22:50,850 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:22:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 71 events. 32/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 218 event pairs, 32 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 139. Up to 67 conditions per place. [2023-08-26 18:22:50,852 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 10 selfloop transitions, 0 changer transitions 0/12 dead transitions. [2023-08-26 18:22:50,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 50 flow [2023-08-26 18:22:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:22:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:22:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2023-08-26 18:22:50,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-26 18:22:50,866 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 153 transitions. [2023-08-26 18:22:50,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 153 transitions. [2023-08-26 18:22:50,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:50,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 153 transitions. [2023-08-26 18:22:50,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:50,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:50,878 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:50,880 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 40 flow. Second operand 2 states and 153 transitions. [2023-08-26 18:22:50,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 50 flow [2023-08-26 18:22:50,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:50,884 INFO L231 Difference]: Finished difference. Result has 18 places, 12 transitions, 28 flow [2023-08-26 18:22:50,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=28, PETRI_PLACES=18, PETRI_TRANSITIONS=12} [2023-08-26 18:22:50,893 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -5 predicate places. [2023-08-26 18:22:50,894 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions, 28 flow [2023-08-26 18:22:50,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:50,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:50,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:22:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:22:50,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:50,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -777544409, now seen corresponding path program 1 times [2023-08-26 18:22:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:50,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261421145] [2023-08-26 18:22:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:51,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:51,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261421145] [2023-08-26 18:22:51,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261421145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:51,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:51,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:22:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463322119] [2023-08-26 18:22:51,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:51,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:51,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 18:22:51,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:51,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 18:22:51,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:51,339 INFO L124 PetriNetUnfolderBase]: 44/106 cut-off events. [2023-08-26 18:22:51,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:51,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 106 events. 44/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 405 event pairs, 16 based on Foata normal form. 7/113 useless extension candidates. Maximal degree in co-relation 212. Up to 64 conditions per place. [2023-08-26 18:22:51,341 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 14 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-08-26 18:22:51,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 80 flow [2023-08-26 18:22:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-26 18:22:51,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-08-26 18:22:51,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-26 18:22:51,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-26 18:22:51,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:51,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-26 18:22:51,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,355 INFO L175 Difference]: Start difference. First operand has 18 places, 12 transitions, 28 flow. Second operand 3 states and 208 transitions. [2023-08-26 18:22:51,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 80 flow [2023-08-26 18:22:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:22:51,357 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 50 flow [2023-08-26 18:22:51,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-08-26 18:22:51,361 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-26 18:22:51,361 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 50 flow [2023-08-26 18:22:51,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:51,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:22:51,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:51,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1665926184, now seen corresponding path program 1 times [2023-08-26 18:22:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:51,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101107977] [2023-08-26 18:22:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101107977] [2023-08-26 18:22:51,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101107977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:51,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:22:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700656187] [2023-08-26 18:22:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:51,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-08-26 18:22:51,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:51,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-08-26 18:22:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:51,565 INFO L124 PetriNetUnfolderBase]: 35/91 cut-off events. [2023-08-26 18:22:51,565 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 18:22:51,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 91 events. 35/91 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 325 event pairs, 16 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 225. Up to 60 conditions per place. [2023-08-26 18:22:51,567 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 12 selfloop transitions, 3 changer transitions 0/17 dead transitions. [2023-08-26 18:22:51,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 89 flow [2023-08-26 18:22:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-26 18:22:51,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2023-08-26 18:22:51,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-26 18:22:51,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-26 18:22:51,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:51,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-26 18:22:51,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,574 INFO L175 Difference]: Start difference. First operand has 21 places, 14 transitions, 50 flow. Second operand 3 states and 212 transitions. [2023-08-26 18:22:51,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 89 flow [2023-08-26 18:22:51,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 84 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:22:51,575 INFO L231 Difference]: Finished difference. Result has 23 places, 14 transitions, 57 flow [2023-08-26 18:22:51,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=14} [2023-08-26 18:22:51,576 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2023-08-26 18:22:51,576 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 14 transitions, 57 flow [2023-08-26 18:22:51,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:51,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:22:51,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:51,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1665925874, now seen corresponding path program 1 times [2023-08-26 18:22:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818536500] [2023-08-26 18:22:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:51,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818536500] [2023-08-26 18:22:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818536500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651048383] [2023-08-26 18:22:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:51,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 18:22:51,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 14 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:51,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 18:22:51,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:51,758 INFO L124 PetriNetUnfolderBase]: 38/95 cut-off events. [2023-08-26 18:22:51,758 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 18:22:51,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 95 events. 38/95 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 333 event pairs, 6 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 240. Up to 52 conditions per place. [2023-08-26 18:22:51,761 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 15 selfloop transitions, 6 changer transitions 0/22 dead transitions. [2023-08-26 18:22:51,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 22 transitions, 121 flow [2023-08-26 18:22:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-26 18:22:51,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018382352941176 [2023-08-26 18:22:51,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-26 18:22:51,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-26 18:22:51,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:51,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-26 18:22:51,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,766 INFO L175 Difference]: Start difference. First operand has 23 places, 14 transitions, 57 flow. Second operand 4 states and 273 transitions. [2023-08-26 18:22:51,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 22 transitions, 121 flow [2023-08-26 18:22:51,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 115 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:51,767 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 77 flow [2023-08-26 18:22:51,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-26 18:22:51,768 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-26 18:22:51,768 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 77 flow [2023-08-26 18:22:51,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:51,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:22:51,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:51,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 104102929, now seen corresponding path program 1 times [2023-08-26 18:22:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354856995] [2023-08-26 18:22:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354856995] [2023-08-26 18:22:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354856995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:51,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:51,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165372205] [2023-08-26 18:22:51,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:51,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 136 [2023-08-26 18:22:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:51,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 136 [2023-08-26 18:22:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:51,938 INFO L124 PetriNetUnfolderBase]: 67/141 cut-off events. [2023-08-26 18:22:51,942 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-08-26 18:22:51,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 141 events. 67/141 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 9 based on Foata normal form. 3/144 useless extension candidates. Maximal degree in co-relation 399. Up to 55 conditions per place. [2023-08-26 18:22:51,943 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 21 selfloop transitions, 8 changer transitions 4/33 dead transitions. [2023-08-26 18:22:51,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 202 flow [2023-08-26 18:22:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-08-26 18:22:51,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49558823529411766 [2023-08-26 18:22:51,945 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-08-26 18:22:51,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-08-26 18:22:51,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:51,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-08-26 18:22:51,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,948 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,948 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 77 flow. Second operand 5 states and 337 transitions. [2023-08-26 18:22:51,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 202 flow [2023-08-26 18:22:51,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:22:51,951 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 120 flow [2023-08-26 18:22:51,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-26 18:22:51,953 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-08-26 18:22:51,953 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 120 flow [2023-08-26 18:22:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:51,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:51,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:22:51,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:51,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 104093629, now seen corresponding path program 2 times [2023-08-26 18:22:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134195826] [2023-08-26 18:22:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:52,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134195826] [2023-08-26 18:22:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134195826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:52,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:52,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194749645] [2023-08-26 18:22:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:52,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:52,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 136 [2023-08-26 18:22:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 136 [2023-08-26 18:22:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:52,108 INFO L124 PetriNetUnfolderBase]: 56/127 cut-off events. [2023-08-26 18:22:52,108 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-08-26 18:22:52,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 127 events. 56/127 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 445 event pairs, 17 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 411. Up to 56 conditions per place. [2023-08-26 18:22:52,109 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 14 selfloop transitions, 4 changer transitions 10/28 dead transitions. [2023-08-26 18:22:52,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 205 flow [2023-08-26 18:22:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2023-08-26 18:22:52,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48676470588235293 [2023-08-26 18:22:52,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 331 transitions. [2023-08-26 18:22:52,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 331 transitions. [2023-08-26 18:22:52,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:52,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 331 transitions. [2023-08-26 18:22:52,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,115 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,115 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 120 flow. Second operand 5 states and 331 transitions. [2023-08-26 18:22:52,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 205 flow [2023-08-26 18:22:52,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 187 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 18:22:52,121 INFO L231 Difference]: Finished difference. Result has 35 places, 12 transitions, 77 flow [2023-08-26 18:22:52,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=12} [2023-08-26 18:22:52,123 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 12 predicate places. [2023-08-26 18:22:52,123 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 12 transitions, 77 flow [2023-08-26 18:22:52,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:52,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:22:52,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:52,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -532455553, now seen corresponding path program 1 times [2023-08-26 18:22:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:52,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919868566] [2023-08-26 18:22:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919868566] [2023-08-26 18:22:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919868566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:52,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:52,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:52,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834659542] [2023-08-26 18:22:52,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:52,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:52,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:52,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 18:22:52,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 12 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:52,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 18:22:52,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:52,324 INFO L124 PetriNetUnfolderBase]: 13/44 cut-off events. [2023-08-26 18:22:52,324 INFO L125 PetriNetUnfolderBase]: For 104/105 co-relation queries the response was YES. [2023-08-26 18:22:52,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 44 events. 13/44 cut-off events. For 104/105 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 103 event pairs, 3 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 154. Up to 20 conditions per place. [2023-08-26 18:22:52,326 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 11 selfloop transitions, 2 changer transitions 10/25 dead transitions. [2023-08-26 18:22:52,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 182 flow [2023-08-26 18:22:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-08-26 18:22:52,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 18:22:52,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-08-26 18:22:52,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-08-26 18:22:52,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:52,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-08-26 18:22:52,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,331 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,334 INFO L175 Difference]: Start difference. First operand has 35 places, 12 transitions, 77 flow. Second operand 5 states and 340 transitions. [2023-08-26 18:22:52,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 182 flow [2023-08-26 18:22:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 123 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-26 18:22:52,336 INFO L231 Difference]: Finished difference. Result has 31 places, 12 transitions, 58 flow [2023-08-26 18:22:52,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2023-08-26 18:22:52,337 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 8 predicate places. [2023-08-26 18:22:52,337 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 58 flow [2023-08-26 18:22:52,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:52,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:22:52,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 18:22:52,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash 264417478, now seen corresponding path program 1 times [2023-08-26 18:22:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:52,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024977893] [2023-08-26 18:22:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:52,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:22:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024977893] [2023-08-26 18:22:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024977893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:52,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357080700] [2023-08-26 18:22:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:52,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 18:22:52,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:52,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 18:22:52,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:52,607 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2023-08-26 18:22:52,607 INFO L125 PetriNetUnfolderBase]: For 18/20 co-relation queries the response was YES. [2023-08-26 18:22:52,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 26 events. 6/26 cut-off events. For 18/20 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 2 based on Foata normal form. 2/27 useless extension candidates. Maximal degree in co-relation 84. Up to 10 conditions per place. [2023-08-26 18:22:52,607 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-26 18:22:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 17 transitions, 102 flow [2023-08-26 18:22:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:22:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:22:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2023-08-26 18:22:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2023-08-26 18:22:52,609 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2023-08-26 18:22:52,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2023-08-26 18:22:52,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:52,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2023-08-26 18:22:52,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,614 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,614 INFO L175 Difference]: Start difference. First operand has 31 places, 12 transitions, 58 flow. Second operand 6 states and 394 transitions. [2023-08-26 18:22:52,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 17 transitions, 102 flow [2023-08-26 18:22:52,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 87 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 18:22:52,615 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-26 18:22:52,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-26 18:22:52,617 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-26 18:22:52,617 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-26 18:22:52,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:52,619 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 18:22:52,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 18:22:52,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 18:22:52,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 18:22:52,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 18:22:52,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 18:22:52,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 18:22:52,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:22:52,621 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:52,623 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:22:52,624 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:22:52,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:22:52 BasicIcfg [2023-08-26 18:22:52,631 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:22:52,632 INFO L158 Benchmark]: Toolchain (without parser) took 4959.79ms. Allocated memory was 329.3MB in the beginning and 402.7MB in the end (delta: 73.4MB). Free memory was 304.5MB in the beginning and 359.0MB in the end (delta: -54.5MB). Peak memory consumption was 20.4MB. Max. memory is 16.0GB. [2023-08-26 18:22:52,632 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 329.3MB. Free memory is still 305.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:52,632 INFO L158 Benchmark]: CACSL2BoogieTranslator took 431.93ms. Allocated memory is still 329.3MB. Free memory was 304.5MB in the beginning and 284.3MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:22:52,632 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.99ms. Allocated memory is still 329.3MB. Free memory was 284.3MB in the beginning and 282.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:22:52,632 INFO L158 Benchmark]: Boogie Preprocessor took 33.11ms. Allocated memory is still 329.3MB. Free memory was 282.6MB in the beginning and 281.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:22:52,633 INFO L158 Benchmark]: RCFGBuilder took 408.38ms. Allocated memory is still 329.3MB. Free memory was 281.0MB in the beginning and 267.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 18:22:52,633 INFO L158 Benchmark]: TraceAbstraction took 4017.86ms. Allocated memory was 329.3MB in the beginning and 402.7MB in the end (delta: 73.4MB). Free memory was 266.8MB in the beginning and 359.0MB in the end (delta: -92.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:52,634 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 329.3MB. Free memory is still 305.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 431.93ms. Allocated memory is still 329.3MB. Free memory was 304.5MB in the beginning and 284.3MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.99ms. Allocated memory is still 329.3MB. Free memory was 284.3MB in the beginning and 282.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.11ms. Allocated memory is still 329.3MB. Free memory was 282.6MB in the beginning and 281.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 408.38ms. Allocated memory is still 329.3MB. Free memory was 281.0MB in the beginning and 267.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 4017.86ms. Allocated memory was 329.3MB in the beginning and 402.7MB in the end (delta: 73.4MB). Free memory was 266.8MB in the beginning and 359.0MB in the end (delta: -92.2MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 67 PlacesBefore, 23 PlacesAfterwards, 61 TransitionsBefore, 17 TransitionsAfterwards, 612 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 61 TotalNumberOfCompositions, 1133 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 810, independent: 753, independent conditional: 0, independent unconditional: 753, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 365, independent: 350, independent conditional: 0, independent unconditional: 350, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 810, independent: 403, independent conditional: 0, independent unconditional: 403, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 365, unknown conditional: 0, unknown unconditional: 365] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189 IncrementalHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 189 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:22:52,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...