/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/safe030_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:29:08,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:29:08,162 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 18:29:08,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:29:08,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:29:08,199 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:29:08,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:29:08,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:29:08,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:29:08,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:29:08,205 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:29:08,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:29:08,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:29:08,206 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:29:08,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:29:08,207 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:29:08,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:29:08,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:29:08,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:29:08,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:29:08,208 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:29:08,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:29:08,209 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:29:08,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:29:08,209 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:29:08,209 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:29:08,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:29:08,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:29:08,210 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:29:08,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:29:08,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:29:08,211 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:29:08,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:29:08,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:29:08,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:29:08,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:29:08,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:29:08,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:29:08,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:29:08,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:29:08,568 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:29:08,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2023-08-26 18:29:09,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:29:09,992 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:29:09,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2023-08-26 18:29:10,027 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63e5b4098/41e90133f7e743ba96127ebbe76f8207/FLAG9e9f0e7a7 [2023-08-26 18:29:10,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63e5b4098/41e90133f7e743ba96127ebbe76f8207 [2023-08-26 18:29:10,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:29:10,049 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:29:10,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:29:10,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:29:10,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:29:10,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@340f4e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10, skipping insertion in model container [2023-08-26 18:29:10,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,111 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:29:10,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:29:10,417 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:29:10,446 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:29:10,448 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:29:10,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:29:10,500 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:29:10,500 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:29:10,506 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:29:10,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10 WrapperNode [2023-08-26 18:29:10,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:29:10,508 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:29:10,508 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:29:10,508 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:29:10,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,564 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2023-08-26 18:29:10,564 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:29:10,565 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:29:10,565 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:29:10,565 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:29:10,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,581 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:29:10,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:29:10,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:29:10,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:29:10,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (1/1) ... [2023-08-26 18:29:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:29:10,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:29:10,640 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 18:29:10,665 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 18:29:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:29:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:29:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:29:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:29:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:29:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:29:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:29:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:29:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:29:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:29:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:29:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:29:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:29:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:29:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:29:10,684 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 18:29:10,785 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:29:10,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:29:10,918 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:29:10,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:29:10,924 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:29:10,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:10 BoogieIcfgContainer [2023-08-26 18:29:10,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:29:10,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:29:10,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:29:10,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:29:10,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:29:10" (1/3) ... [2023-08-26 18:29:10,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12012e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:10, skipping insertion in model container [2023-08-26 18:29:10,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:10" (2/3) ... [2023-08-26 18:29:10,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12012e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:10, skipping insertion in model container [2023-08-26 18:29:10,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:10" (3/3) ... [2023-08-26 18:29:10,934 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2023-08-26 18:29:10,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:29:10,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:29:10,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:29:10,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:29:11,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 93 transitions, 201 flow [2023-08-26 18:29:11,093 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-08-26 18:29:11,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 90 events. 3/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 18:29:11,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 93 transitions, 201 flow [2023-08-26 18:29:11,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 76 transitions, 161 flow [2023-08-26 18:29:11,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:29:11,118 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 76 transitions, 161 flow [2023-08-26 18:29:11,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 76 transitions, 161 flow [2023-08-26 18:29:11,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 76 transitions, 161 flow [2023-08-26 18:29:11,177 INFO L124 PetriNetUnfolderBase]: 1/76 cut-off events. [2023-08-26 18:29:11,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:11,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 1/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 18:29:11,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 18:29:13,427 INFO L134 LiptonReduction]: Checked pairs total: 2382 [2023-08-26 18:29:13,428 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-26 18:29:13,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:29:13,446 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;@48e3a127, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:29:13,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:29:13,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:29:13,448 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:29:13,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:13,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:29:13,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:13,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash 323, now seen corresponding path program 1 times [2023-08-26 18:29:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:13,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093833867] [2023-08-26 18:29:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:13,564 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 18:29:13,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:13,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093833867] [2023-08-26 18:29:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093833867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:13,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:29:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840314434] [2023-08-26 18:29:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:29:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:29:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:29:13,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 168 [2023-08-26 18:29:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:13,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:13,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 168 [2023-08-26 18:29:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:13,674 INFO L124 PetriNetUnfolderBase]: 164/295 cut-off events. [2023-08-26 18:29:13,674 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:29:13,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 295 events. 164/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1204 event pairs, 164 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 585. Up to 271 conditions per place. [2023-08-26 18:29:13,678 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 18:29:13,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 18:29:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:29:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:29:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 18:29:13,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2023-08-26 18:29:13,691 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 18:29:13,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 18:29:13,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:13,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 18:29:13,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:13,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:13,709 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:13,711 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 57 flow. Second operand 2 states and 193 transitions. [2023-08-26 18:29:13,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 18:29:13,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:29:13,715 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 18:29:13,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 18:29:13,720 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 18:29:13,720 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 18:29:13,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:13,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:13,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:29:13,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:13,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1206892691, now seen corresponding path program 1 times [2023-08-26 18:29:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831356860] [2023-08-26 18:29:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:14,106 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 18:29:14,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831356860] [2023-08-26 18:29:14,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831356860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:14,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:14,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:29:14,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255582964] [2023-08-26 18:29:14,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:14,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:14,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:14,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:14,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 168 [2023-08-26 18:29:14,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:14,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 168 [2023-08-26 18:29:14,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:14,199 INFO L124 PetriNetUnfolderBase]: 212/370 cut-off events. [2023-08-26 18:29:14,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 370 events. 212/370 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1498 event pairs, 66 based on Foata normal form. 6/375 useless extension candidates. Maximal degree in co-relation 747. Up to 288 conditions per place. [2023-08-26 18:29:14,203 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 20 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-26 18:29:14,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 104 flow [2023-08-26 18:29:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-26 18:29:14,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-08-26 18:29:14,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-26 18:29:14,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-26 18:29:14,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:14,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-26 18:29:14,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,210 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 270 transitions. [2023-08-26 18:29:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 104 flow [2023-08-26 18:29:14,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:29:14,212 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 59 flow [2023-08-26 18:29:14,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 18:29:14,212 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 18:29:14,213 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 59 flow [2023-08-26 18:29:14,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:14,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:29:14,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:14,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1241032984, now seen corresponding path program 1 times [2023-08-26 18:29:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386119795] [2023-08-26 18:29:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:14,365 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 18:29:14,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:14,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386119795] [2023-08-26 18:29:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386119795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413024375] [2023-08-26 18:29:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:14,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:29:14,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 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 18:29:14,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:14,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:29:14,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:14,491 INFO L124 PetriNetUnfolderBase]: 499/802 cut-off events. [2023-08-26 18:29:14,491 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-08-26 18:29:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 802 events. 499/802 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3310 event pairs, 81 based on Foata normal form. 54/856 useless extension candidates. Maximal degree in co-relation 1863. Up to 482 conditions per place. [2023-08-26 18:29:14,497 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 33 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-08-26 18:29:14,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 216 flow [2023-08-26 18:29:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:29:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:29:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-08-26 18:29:14,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2023-08-26 18:29:14,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-08-26 18:29:14,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-08-26 18:29:14,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:14,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-08-26 18:29:14,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,505 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,505 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 59 flow. Second operand 4 states and 346 transitions. [2023-08-26 18:29:14,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 216 flow [2023-08-26 18:29:14,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:14,507 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 148 flow [2023-08-26 18:29:14,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-26 18:29:14,508 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-26 18:29:14,508 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 148 flow [2023-08-26 18:29:14,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 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 18:29:14,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:14,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:29:14,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:14,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 182682016, now seen corresponding path program 1 times [2023-08-26 18:29:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964931453] [2023-08-26 18:29:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:14,661 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 18:29:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964931453] [2023-08-26 18:29:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964931453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:14,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:14,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:14,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328954702] [2023-08-26 18:29:14,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:14,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:14,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:14,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:29:14,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:14,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:29:14,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:14,778 INFO L124 PetriNetUnfolderBase]: 493/793 cut-off events. [2023-08-26 18:29:14,779 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2023-08-26 18:29:14,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2512 conditions, 793 events. 493/793 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3259 event pairs, 71 based on Foata normal form. 3/796 useless extension candidates. Maximal degree in co-relation 2505. Up to 468 conditions per place. [2023-08-26 18:29:14,784 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-26 18:29:14,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 372 flow [2023-08-26 18:29:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:29:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:29:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2023-08-26 18:29:14,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163690476190477 [2023-08-26 18:29:14,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2023-08-26 18:29:14,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2023-08-26 18:29:14,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:14,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2023-08-26 18:29:14,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,793 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 148 flow. Second operand 4 states and 347 transitions. [2023-08-26 18:29:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 372 flow [2023-08-26 18:29:14,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:29:14,798 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 296 flow [2023-08-26 18:29:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-08-26 18:29:14,799 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 18:29:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 296 flow [2023-08-26 18:29:14,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:14,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:29:14,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:14,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1368197523, now seen corresponding path program 1 times [2023-08-26 18:29:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:14,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027883670] [2023-08-26 18:29:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:14,935 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 18:29:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027883670] [2023-08-26 18:29:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027883670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:14,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:14,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:29:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692028784] [2023-08-26 18:29:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:14,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:14,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:29:14,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:14,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:14,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:29:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:15,065 INFO L124 PetriNetUnfolderBase]: 580/954 cut-off events. [2023-08-26 18:29:15,066 INFO L125 PetriNetUnfolderBase]: For 1782/1782 co-relation queries the response was YES. [2023-08-26 18:29:15,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3576 conditions, 954 events. 580/954 cut-off events. For 1782/1782 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4276 event pairs, 124 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 3566. Up to 360 conditions per place. [2023-08-26 18:29:15,072 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 39 selfloop transitions, 24 changer transitions 2/65 dead transitions. [2023-08-26 18:29:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 542 flow [2023-08-26 18:29:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:29:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:29:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-08-26 18:29:15,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2023-08-26 18:29:15,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-08-26 18:29:15,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-08-26 18:29:15,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:15,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-08-26 18:29:15,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,078 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 296 flow. Second operand 4 states and 348 transitions. [2023-08-26 18:29:15,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 542 flow [2023-08-26 18:29:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:29:15,084 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 452 flow [2023-08-26 18:29:15,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=452, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-26 18:29:15,085 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-26 18:29:15,085 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 452 flow [2023-08-26 18:29:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:15,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:15,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:29:15,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:15,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1368234041, now seen corresponding path program 1 times [2023-08-26 18:29:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282820141] [2023-08-26 18:29:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:15,175 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 18:29:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282820141] [2023-08-26 18:29:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282820141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:15,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704336687] [2023-08-26 18:29:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:15,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:15,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:15,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 168 [2023-08-26 18:29:15,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:15,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 168 [2023-08-26 18:29:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:15,251 INFO L124 PetriNetUnfolderBase]: 230/482 cut-off events. [2023-08-26 18:29:15,251 INFO L125 PetriNetUnfolderBase]: For 2143/2172 co-relation queries the response was YES. [2023-08-26 18:29:15,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 482 events. 230/482 cut-off events. For 2143/2172 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2509 event pairs, 43 based on Foata normal form. 39/509 useless extension candidates. Maximal degree in co-relation 1997. Up to 341 conditions per place. [2023-08-26 18:29:15,255 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 46 selfloop transitions, 4 changer transitions 1/67 dead transitions. [2023-08-26 18:29:15,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 744 flow [2023-08-26 18:29:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-26 18:29:15,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2023-08-26 18:29:15,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-26 18:29:15,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-26 18:29:15,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:15,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-26 18:29:15,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,260 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 452 flow. Second operand 3 states and 268 transitions. [2023-08-26 18:29:15,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 744 flow [2023-08-26 18:29:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 742 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 18:29:15,266 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 476 flow [2023-08-26 18:29:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-26 18:29:15,267 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 15 predicate places. [2023-08-26 18:29:15,267 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 476 flow [2023-08-26 18:29:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:15,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:29:15,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:15,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -536699174, now seen corresponding path program 1 times [2023-08-26 18:29:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487314334] [2023-08-26 18:29:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:15,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:15,388 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 18:29:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487314334] [2023-08-26 18:29:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487314334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415130956] [2023-08-26 18:29:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:15,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 168 [2023-08-26 18:29:15,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:15,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 168 [2023-08-26 18:29:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:15,490 INFO L124 PetriNetUnfolderBase]: 327/663 cut-off events. [2023-08-26 18:29:15,490 INFO L125 PetriNetUnfolderBase]: For 2751/2790 co-relation queries the response was YES. [2023-08-26 18:29:15,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 663 events. 327/663 cut-off events. For 2751/2790 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3506 event pairs, 97 based on Foata normal form. 9/657 useless extension candidates. Maximal degree in co-relation 3105. Up to 339 conditions per place. [2023-08-26 18:29:15,495 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 37 selfloop transitions, 8 changer transitions 3/58 dead transitions. [2023-08-26 18:29:15,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 621 flow [2023-08-26 18:29:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-26 18:29:15,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-08-26 18:29:15,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-26 18:29:15,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-26 18:29:15,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:15,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-26 18:29:15,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,502 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 476 flow. Second operand 3 states and 270 transitions. [2023-08-26 18:29:15,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 621 flow [2023-08-26 18:29:15,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:15,509 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 474 flow [2023-08-26 18:29:15,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-26 18:29:15,510 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2023-08-26 18:29:15,510 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 474 flow [2023-08-26 18:29:15,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:15,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:15,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:29:15,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:15,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1488405021, now seen corresponding path program 1 times [2023-08-26 18:29:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075645309] [2023-08-26 18:29:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:15,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:15,633 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 18:29:15,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075645309] [2023-08-26 18:29:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075645309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:15,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:15,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:29:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232201139] [2023-08-26 18:29:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:15,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:15,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:29:15,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:15,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:29:15,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:15,783 INFO L124 PetriNetUnfolderBase]: 500/937 cut-off events. [2023-08-26 18:29:15,783 INFO L125 PetriNetUnfolderBase]: For 3723/3723 co-relation queries the response was YES. [2023-08-26 18:29:15,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4378 conditions, 937 events. 500/937 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4858 event pairs, 107 based on Foata normal form. 5/942 useless extension candidates. Maximal degree in co-relation 4362. Up to 505 conditions per place. [2023-08-26 18:29:15,790 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 40 selfloop transitions, 21 changer transitions 8/69 dead transitions. [2023-08-26 18:29:15,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 744 flow [2023-08-26 18:29:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:29:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:29:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2023-08-26 18:29:15,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2023-08-26 18:29:15,793 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2023-08-26 18:29:15,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2023-08-26 18:29:15,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:15,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2023-08-26 18:29:15,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,797 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,797 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 474 flow. Second operand 4 states and 344 transitions. [2023-08-26 18:29:15,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 744 flow [2023-08-26 18:29:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 726 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:15,808 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 461 flow [2023-08-26 18:29:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-26 18:29:15,810 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-08-26 18:29:15,811 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 461 flow [2023-08-26 18:29:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:15,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:29:15,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:15,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -692597104, now seen corresponding path program 1 times [2023-08-26 18:29:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:15,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772843760] [2023-08-26 18:29:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:15,931 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 18:29:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772843760] [2023-08-26 18:29:15,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772843760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:15,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:15,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:29:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831948962] [2023-08-26 18:29:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:15,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 168 [2023-08-26 18:29:15,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:15,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:15,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 168 [2023-08-26 18:29:15,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:16,036 INFO L124 PetriNetUnfolderBase]: 165/402 cut-off events. [2023-08-26 18:29:16,037 INFO L125 PetriNetUnfolderBase]: For 1757/1834 co-relation queries the response was YES. [2023-08-26 18:29:16,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 402 events. 165/402 cut-off events. For 1757/1834 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2248 event pairs, 23 based on Foata normal form. 95/484 useless extension candidates. Maximal degree in co-relation 1839. Up to 228 conditions per place. [2023-08-26 18:29:16,039 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 32 selfloop transitions, 7 changer transitions 21/68 dead transitions. [2023-08-26 18:29:16,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 833 flow [2023-08-26 18:29:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:29:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:29:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-26 18:29:16,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-26 18:29:16,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-26 18:29:16,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-26 18:29:16,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:16,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-26 18:29:16,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,044 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 461 flow. Second operand 4 states and 357 transitions. [2023-08-26 18:29:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 833 flow [2023-08-26 18:29:16,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 783 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 18:29:16,051 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 353 flow [2023-08-26 18:29:16,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2023-08-26 18:29:16,052 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 21 predicate places. [2023-08-26 18:29:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 353 flow [2023-08-26 18:29:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:16,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:16,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:29:16,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:16,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2071472750, now seen corresponding path program 1 times [2023-08-26 18:29:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:16,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293664782] [2023-08-26 18:29:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:16,165 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 18:29:16,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:16,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293664782] [2023-08-26 18:29:16,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293664782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:16,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:16,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:29:16,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332797588] [2023-08-26 18:29:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:16,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:29:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:29:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:29:16,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 168 [2023-08-26 18:29:16,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:16,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 168 [2023-08-26 18:29:16,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:16,219 INFO L124 PetriNetUnfolderBase]: 54/138 cut-off events. [2023-08-26 18:29:16,220 INFO L125 PetriNetUnfolderBase]: For 724/772 co-relation queries the response was YES. [2023-08-26 18:29:16,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 138 events. 54/138 cut-off events. For 724/772 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 510 event pairs, 8 based on Foata normal form. 37/170 useless extension candidates. Maximal degree in co-relation 750. Up to 69 conditions per place. [2023-08-26 18:29:16,221 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2023-08-26 18:29:16,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 560 flow [2023-08-26 18:29:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:29:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:29:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 437 transitions. [2023-08-26 18:29:16,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202380952380953 [2023-08-26 18:29:16,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 437 transitions. [2023-08-26 18:29:16,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 437 transitions. [2023-08-26 18:29:16,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:16,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 437 transitions. [2023-08-26 18:29:16,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,226 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,226 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 353 flow. Second operand 5 states and 437 transitions. [2023-08-26 18:29:16,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 560 flow [2023-08-26 18:29:16,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 455 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-26 18:29:16,229 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-26 18:29:16,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-26 18:29:16,230 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-08-26 18:29:16,230 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-26 18:29:16,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:16,233 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:29:16,233 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:29:16,233 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:29:16,233 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:29:16,233 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:29:16,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:29:16,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:29:16,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:29:16,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:29:16,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:29:16,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:29:16,235 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:16,237 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:29:16,237 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:29:16,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:29:16 BasicIcfg [2023-08-26 18:29:16,246 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:29:16,247 INFO L158 Benchmark]: Toolchain (without parser) took 6197.57ms. Allocated memory was 375.4MB in the beginning and 497.0MB in the end (delta: 121.6MB). Free memory was 350.8MB in the beginning and 410.0MB in the end (delta: -59.1MB). Peak memory consumption was 63.0MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,247 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 375.4MB. Free memory is still 351.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:29:16,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.98ms. Allocated memory is still 375.4MB. Free memory was 350.8MB in the beginning and 330.5MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.92ms. Allocated memory is still 375.4MB. Free memory was 330.5MB in the beginning and 328.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,248 INFO L158 Benchmark]: Boogie Preprocessor took 26.70ms. Allocated memory is still 375.4MB. Free memory was 328.4MB in the beginning and 326.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,248 INFO L158 Benchmark]: RCFGBuilder took 334.07ms. Allocated memory is still 375.4MB. Free memory was 326.7MB in the beginning and 312.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,249 INFO L158 Benchmark]: TraceAbstraction took 5318.00ms. Allocated memory was 375.4MB in the beginning and 497.0MB in the end (delta: 121.6MB). Free memory was 311.6MB in the beginning and 410.0MB in the end (delta: -98.4MB). Peak memory consumption was 25.3MB. Max. memory is 16.0GB. [2023-08-26 18:29:16,250 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 375.4MB. Free memory is still 351.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 455.98ms. Allocated memory is still 375.4MB. Free memory was 350.8MB in the beginning and 330.5MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.92ms. Allocated memory is still 375.4MB. Free memory was 330.5MB in the beginning and 328.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.70ms. Allocated memory is still 375.4MB. Free memory was 328.4MB in the beginning and 326.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 334.07ms. Allocated memory is still 375.4MB. Free memory was 326.7MB in the beginning and 312.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5318.00ms. Allocated memory was 375.4MB in the beginning and 497.0MB in the end (delta: 121.6MB). Free memory was 311.6MB in the beginning and 410.0MB in the end (delta: -98.4MB). Peak memory consumption was 25.3MB. 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: 2.3s, 85 PlacesBefore, 33 PlacesAfterwards, 76 TransitionsBefore, 24 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 28 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 75 TotalNumberOfCompositions, 2382 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1248, independent: 1165, independent conditional: 0, independent unconditional: 1165, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 664, independent: 629, independent conditional: 0, independent unconditional: 629, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1248, independent: 536, independent conditional: 0, independent unconditional: 536, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 664, unknown conditional: 0, unknown unconditional: 664] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 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 7 procedures, 115 locations, 10 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: 5.2s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99 mSDsluCounter, 39 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 346 IncrementalHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 23 mSDtfsCounter, 346 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=476occurred in iteration=6, InterpolantAutomatonStates: 36, 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, 1.2s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 278 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:29:16,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...