/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/weaver/test-easy10.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:20:26,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:20:26,455 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 20:20:26,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:20:26,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:20:26,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:20:26,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:20:26,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:20:26,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:20:26,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:20:26,480 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:20:26,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:20:26,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:20:26,481 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:20:26,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:20:26,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:20:26,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:20:26,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:20:26,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:20:26,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:20:26,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:20:26,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:20:26,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:20:26,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:20:26,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:20:26,491 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:20:26,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:20:26,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:26,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:20:26,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:20:26,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:20:26,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:20:26,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:20:26,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:20:26,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:20:26,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:20:26,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:20:26,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:20:26,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:20:26,801 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:20:26,801 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:20:26,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy10.wvr.c [2023-08-26 20:20:27,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:20:28,157 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:20:28,157 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy10.wvr.c [2023-08-26 20:20:28,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1a59e3b/095b6fa2feb348ac9c91ce5405d20311/FLAGcb86f23ce [2023-08-26 20:20:28,176 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1a59e3b/095b6fa2feb348ac9c91ce5405d20311 [2023-08-26 20:20:28,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:20:28,182 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:20:28,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:28,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:20:28,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:20:28,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28, skipping insertion in model container [2023-08-26 20:20:28,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,221 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:20:28,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:28,425 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:20:28,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:28,472 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:28,473 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:28,479 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:20:28,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28 WrapperNode [2023-08-26 20:20:28,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:28,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:28,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:20:28,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:20:28,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,539 INFO L138 Inliner]: procedures = 23, calls = 85, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 194 [2023-08-26 20:20:28,539 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:28,540 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:20:28,540 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:20:28,540 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:20:28,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:20:28,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:20:28,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:20:28,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:20:28,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (1/1) ... [2023-08-26 20:20:28,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:28,615 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 20:20:28,624 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 20:20:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:20:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:20:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:20:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:20:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:20:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 20:20:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 20:20:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 20:20:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 20:20:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:20:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:20:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:20:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:20:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:20:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:20:28,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:20:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:20:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:20:28,654 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 20:20:28,746 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:20:28,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:20:29,129 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:20:29,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:20:29,177 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:20:29,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:29 BoogieIcfgContainer [2023-08-26 20:20:29,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:20:29,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:20:29,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:20:29,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:20:29,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:20:28" (1/3) ... [2023-08-26 20:20:29,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405acb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:29, skipping insertion in model container [2023-08-26 20:20:29,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:28" (2/3) ... [2023-08-26 20:20:29,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405acb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:29, skipping insertion in model container [2023-08-26 20:20:29,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:29" (3/3) ... [2023-08-26 20:20:29,189 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy10.wvr.c [2023-08-26 20:20:29,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:20:29,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 20:20:29,204 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:20:29,268 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 20:20:29,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 336 flow [2023-08-26 20:20:29,374 INFO L124 PetriNetUnfolderBase]: 2/148 cut-off events. [2023-08-26 20:20:29,374 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:20:29,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 148 events. 2/148 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 133 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-08-26 20:20:29,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 336 flow [2023-08-26 20:20:29,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 135 transitions, 294 flow [2023-08-26 20:20:29,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:20:29,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 135 transitions, 294 flow [2023-08-26 20:20:29,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 135 transitions, 294 flow [2023-08-26 20:20:29,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 135 transitions, 294 flow [2023-08-26 20:20:29,464 INFO L124 PetriNetUnfolderBase]: 2/135 cut-off events. [2023-08-26 20:20:29,464 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:20:29,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 135 events. 2/135 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-08-26 20:20:29,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 2336 [2023-08-26 20:20:34,065 INFO L134 LiptonReduction]: Checked pairs total: 14665 [2023-08-26 20:20:34,065 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-26 20:20:34,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:20:34,082 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;@4873abac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:20:34,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 20:20:34,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:20:34,084 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 20:20:34,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:20:34,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:34,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash 553, now seen corresponding path program 1 times [2023-08-26 20:20:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:34,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602161683] [2023-08-26 20:20:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:34,182 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 20:20:34,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602161683] [2023-08-26 20:20:34,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602161683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:34,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:20:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185572987] [2023-08-26 20:20:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:34,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:20:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:20:34,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:20:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 262 [2023-08-26 20:20:34,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 138 flow. Second operand has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:34,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:34,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 262 [2023-08-26 20:20:34,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:34,533 INFO L124 PetriNetUnfolderBase]: 1328/2127 cut-off events. [2023-08-26 20:20:34,533 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 20:20:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 2127 events. 1328/2127 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13568 event pairs, 1328 based on Foata normal form. 0/1520 useless extension candidates. Maximal degree in co-relation 3308. Up to 1968 conditions per place. [2023-08-26 20:20:34,557 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 39 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-08-26 20:20:34,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 212 flow [2023-08-26 20:20:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:20:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:20:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 315 transitions. [2023-08-26 20:20:34,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601145038167939 [2023-08-26 20:20:34,572 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 315 transitions. [2023-08-26 20:20:34,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 315 transitions. [2023-08-26 20:20:34,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:34,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 315 transitions. [2023-08-26 20:20:34,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 157.5) internal successors, (315), 2 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 20:20:34,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:34,583 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:34,584 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 138 flow. Second operand 2 states and 315 transitions. [2023-08-26 20:20:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 212 flow [2023-08-26 20:20:34,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 20:20:34,591 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 118 flow [2023-08-26 20:20:34,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-26 20:20:34,595 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 20:20:34,595 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 118 flow [2023-08-26 20:20:34,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:34,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:34,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:34,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:20:34,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:34,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash 546510, now seen corresponding path program 1 times [2023-08-26 20:20:34,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:34,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901437336] [2023-08-26 20:20:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:34,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:34,990 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 20:20:34,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:34,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901437336] [2023-08-26 20:20:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901437336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:34,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:34,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156292713] [2023-08-26 20:20:34,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:34,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:34,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 20:20:34,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:34,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:34,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 20:20:34,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:35,246 INFO L124 PetriNetUnfolderBase]: 1272/2041 cut-off events. [2023-08-26 20:20:35,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:35,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3965 conditions, 2041 events. 1272/2041 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12979 event pairs, 1272 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 3962. Up to 1881 conditions per place. [2023-08-26 20:20:35,257 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 36 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-26 20:20:35,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 188 flow [2023-08-26 20:20:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 20:20:35,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541984732824427 [2023-08-26 20:20:35,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 20:20:35,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 20:20:35,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:35,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 20:20:35,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 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 20:20:35,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,270 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 118 flow. Second operand 3 states and 357 transitions. [2023-08-26 20:20:35,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 188 flow [2023-08-26 20:20:35,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:20:35,274 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 116 flow [2023-08-26 20:20:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-26 20:20:35,275 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 20:20:35,275 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 116 flow [2023-08-26 20:20:35,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:35,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:20:35,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:35,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 546511, now seen corresponding path program 1 times [2023-08-26 20:20:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760500701] [2023-08-26 20:20:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:35,419 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 20:20:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760500701] [2023-08-26 20:20:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760500701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:35,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316603514] [2023-08-26 20:20:35,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:35,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:35,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 20:20:35,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:35,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 20:20:35,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:35,599 INFO L124 PetriNetUnfolderBase]: 1216/1955 cut-off events. [2023-08-26 20:20:35,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:35,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 1955 events. 1216/1955 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12321 event pairs, 1216 based on Foata normal form. 0/1412 useless extension candidates. Maximal degree in co-relation 3791. Up to 1795 conditions per place. [2023-08-26 20:20:35,612 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 34 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 20:20:35,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 182 flow [2023-08-26 20:20:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-26 20:20:35,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669211195928753 [2023-08-26 20:20:35,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-26 20:20:35,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-26 20:20:35,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:35,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-26 20:20:35,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,617 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 116 flow. Second operand 3 states and 367 transitions. [2023-08-26 20:20:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 182 flow [2023-08-26 20:20:35,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:35,619 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 113 flow [2023-08-26 20:20:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-26 20:20:35,620 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-26 20:20:35,620 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 113 flow [2023-08-26 20:20:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:20:35,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:35,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 525208169, now seen corresponding path program 1 times [2023-08-26 20:20:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112775719] [2023-08-26 20:20:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:35,719 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 20:20:35,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:35,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112775719] [2023-08-26 20:20:35,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112775719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:35,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358532433] [2023-08-26 20:20:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:35,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 20:20:35,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:35,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 20:20:35,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:35,887 INFO L124 PetriNetUnfolderBase]: 1192/1913 cut-off events. [2023-08-26 20:20:35,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:35,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3712 conditions, 1913 events. 1192/1913 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12078 event pairs, 1192 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 3708. Up to 1753 conditions per place. [2023-08-26 20:20:35,899 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 32 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 20:20:35,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 175 flow [2023-08-26 20:20:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 20:20:35,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643765903307888 [2023-08-26 20:20:35,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 20:20:35,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 20:20:35,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:35,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 20:20:35,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,904 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 113 flow. Second operand 3 states and 365 transitions. [2023-08-26 20:20:35,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 175 flow [2023-08-26 20:20:35,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:35,905 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 110 flow [2023-08-26 20:20:35,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-26 20:20:35,906 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -11 predicate places. [2023-08-26 20:20:35,906 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 110 flow [2023-08-26 20:20:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:35,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:20:35,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:35,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 525208171, now seen corresponding path program 1 times [2023-08-26 20:20:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223045406] [2023-08-26 20:20:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:35,983 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 20:20:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223045406] [2023-08-26 20:20:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223045406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:35,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:35,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111850775] [2023-08-26 20:20:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:35,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 20:20:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:35,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:35,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 20:20:35,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,157 INFO L124 PetriNetUnfolderBase]: 1168/1871 cut-off events. [2023-08-26 20:20:36,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:36,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1871 events. 1168/1871 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11682 event pairs, 1168 based on Foata normal form. 0/1376 useless extension candidates. Maximal degree in co-relation 3625. Up to 1711 conditions per place. [2023-08-26 20:20:36,171 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 30 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-26 20:20:36,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 168 flow [2023-08-26 20:20:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-26 20:20:36,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44656488549618323 [2023-08-26 20:20:36,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-26 20:20:36,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-26 20:20:36,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-26 20:20:36,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,176 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 110 flow. Second operand 3 states and 351 transitions. [2023-08-26 20:20:36,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 168 flow [2023-08-26 20:20:36,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:36,178 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 107 flow [2023-08-26 20:20:36,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-26 20:20:36,179 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 20:20:36,179 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 107 flow [2023-08-26 20:20:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:20:36,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:36,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2081076345, now seen corresponding path program 1 times [2023-08-26 20:20:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69106462] [2023-08-26 20:20:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:36,215 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 20:20:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69106462] [2023-08-26 20:20:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69106462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:36,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:36,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:36,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428137116] [2023-08-26 20:20:36,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:36,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 20:20:36,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:36,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 20:20:36,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,373 INFO L124 PetriNetUnfolderBase]: 1112/1785 cut-off events. [2023-08-26 20:20:36,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:36,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 1785 events. 1112/1785 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11124 event pairs, 1112 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 3454. Up to 1625 conditions per place. [2023-08-26 20:20:36,385 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 28 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 20:20:36,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 161 flow [2023-08-26 20:20:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-26 20:20:36,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440203562340967 [2023-08-26 20:20:36,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-26 20:20:36,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-26 20:20:36,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-26 20:20:36,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,390 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 107 flow. Second operand 3 states and 349 transitions. [2023-08-26 20:20:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 161 flow [2023-08-26 20:20:36,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:36,391 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 104 flow [2023-08-26 20:20:36,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-26 20:20:36,392 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -13 predicate places. [2023-08-26 20:20:36,392 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 104 flow [2023-08-26 20:20:36,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:36,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:20:36,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:36,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2081076344, now seen corresponding path program 1 times [2023-08-26 20:20:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432993931] [2023-08-26 20:20:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:36,447 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 20:20:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432993931] [2023-08-26 20:20:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432993931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:36,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:36,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:36,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207792799] [2023-08-26 20:20:36,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:36,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:36,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:36,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 20:20:36,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:36,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 20:20:36,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,624 INFO L124 PetriNetUnfolderBase]: 1056/1699 cut-off events. [2023-08-26 20:20:36,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 1699 events. 1056/1699 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10478 event pairs, 1056 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 3283. Up to 1539 conditions per place. [2023-08-26 20:20:36,634 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 26 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 20:20:36,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 154 flow [2023-08-26 20:20:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 20:20:36,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45674300254452926 [2023-08-26 20:20:36,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 20:20:36,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 20:20:36,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 20:20:36,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,640 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 104 flow. Second operand 3 states and 359 transitions. [2023-08-26 20:20:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 154 flow [2023-08-26 20:20:36,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:36,641 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 101 flow [2023-08-26 20:20:36,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-26 20:20:36,642 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 20:20:36,642 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 101 flow [2023-08-26 20:20:36,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:20:36,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:36,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1540407371, now seen corresponding path program 1 times [2023-08-26 20:20:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031864560] [2023-08-26 20:20:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:36,679 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 20:20:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:36,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031864560] [2023-08-26 20:20:36,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031864560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:36,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:36,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:36,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301700942] [2023-08-26 20:20:36,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:36,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:36,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:36,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 20:20:36,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:36,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 20:20:36,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,822 INFO L124 PetriNetUnfolderBase]: 840/1402 cut-off events. [2023-08-26 20:20:36,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1402 events. 840/1402 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8592 event pairs, 840 based on Foata normal form. 0/1147 useless extension candidates. Maximal degree in co-relation 2690. Up to 1242 conditions per place. [2023-08-26 20:20:36,830 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 25 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 20:20:36,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 151 flow [2023-08-26 20:20:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 20:20:36,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541984732824427 [2023-08-26 20:20:36,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 20:20:36,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 20:20:36,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 20:20:36,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 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 20:20:36,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,834 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 101 flow. Second operand 3 states and 357 transitions. [2023-08-26 20:20:36,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 151 flow [2023-08-26 20:20:36,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 42 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:36,836 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 100 flow [2023-08-26 20:20:36,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-26 20:20:36,836 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 20:20:36,837 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 100 flow [2023-08-26 20:20:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:36,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:20:36,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:36,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1540407373, now seen corresponding path program 1 times [2023-08-26 20:20:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375959457] [2023-08-26 20:20:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,004 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 20:20:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375959457] [2023-08-26 20:20:37,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375959457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:20:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307520664] [2023-08-26 20:20:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:20:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:20:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:20:37,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 262 [2023-08-26 20:20:37,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 262 [2023-08-26 20:20:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,120 INFO L124 PetriNetUnfolderBase]: 624/1105 cut-off events. [2023-08-26 20:20:37,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:37,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 1105 events. 624/1105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6665 event pairs, 624 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 2097. Up to 945 conditions per place. [2023-08-26 20:20:37,136 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 20:20:37,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 41 transitions, 148 flow [2023-08-26 20:20:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-08-26 20:20:37,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033078880407125 [2023-08-26 20:20:37,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-08-26 20:20:37,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-08-26 20:20:37,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-08-26 20:20:37,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,141 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 100 flow. Second operand 3 states and 317 transitions. [2023-08-26 20:20:37,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 41 transitions, 148 flow [2023-08-26 20:20:37,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,142 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 99 flow [2023-08-26 20:20:37,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-26 20:20:37,143 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 20:20:37,143 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 99 flow [2023-08-26 20:20:37,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:37,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:20:37,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:37,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash 353494060, now seen corresponding path program 1 times [2023-08-26 20:20:37,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615533308] [2023-08-26 20:20:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,518 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 20:20:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615533308] [2023-08-26 20:20:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615533308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798104125] [2023-08-26 20:20:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:37,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 20:20:37,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 20:20:37,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,649 INFO L124 PetriNetUnfolderBase]: 585/1061 cut-off events. [2023-08-26 20:20:37,650 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-26 20:20:37,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1991 conditions, 1061 events. 585/1061 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5709 event pairs, 180 based on Foata normal form. 17/1057 useless extension candidates. Maximal degree in co-relation 1987. Up to 756 conditions per place. [2023-08-26 20:20:37,655 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 33 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-26 20:20:37,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 189 flow [2023-08-26 20:20:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-26 20:20:37,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610687022900763 [2023-08-26 20:20:37,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-26 20:20:37,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-26 20:20:37,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-26 20:20:37,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,661 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 99 flow. Second operand 3 states and 441 transitions. [2023-08-26 20:20:37,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 189 flow [2023-08-26 20:20:37,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,662 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 106 flow [2023-08-26 20:20:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-26 20:20:37,663 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 20:20:37,663 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 106 flow [2023-08-26 20:20:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:20:37,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:37,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1385908800, now seen corresponding path program 2 times [2023-08-26 20:20:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329469966] [2023-08-26 20:20:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,875 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 20:20:37,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329469966] [2023-08-26 20:20:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329469966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419423549] [2023-08-26 20:20:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:37,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 20:20:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 20:20:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,996 INFO L124 PetriNetUnfolderBase]: 627/1121 cut-off events. [2023-08-26 20:20:37,996 INFO L125 PetriNetUnfolderBase]: For 97/118 co-relation queries the response was YES. [2023-08-26 20:20:37,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 1121 events. 627/1121 cut-off events. For 97/118 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6081 event pairs, 180 based on Foata normal form. 23/1088 useless extension candidates. Maximal degree in co-relation 2213. Up to 816 conditions per place. [2023-08-26 20:20:38,002 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 35 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 20:20:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 205 flow [2023-08-26 20:20:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 20:20:38,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636132315521628 [2023-08-26 20:20:38,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,008 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 106 flow. Second operand 3 states and 443 transitions. [2023-08-26 20:20:38,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 205 flow [2023-08-26 20:20:38,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:38,010 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 110 flow [2023-08-26 20:20:38,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-26 20:20:38,010 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -11 predicate places. [2023-08-26 20:20:38,011 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 110 flow [2023-08-26 20:20:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:20:38,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:38,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2120873262, now seen corresponding path program 3 times [2023-08-26 20:20:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932488855] [2023-08-26 20:20:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,296 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 20:20:38,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932488855] [2023-08-26 20:20:38,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932488855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811219933] [2023-08-26 20:20:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:38,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 20:20:38,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 20:20:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,421 INFO L124 PetriNetUnfolderBase]: 573/989 cut-off events. [2023-08-26 20:20:38,421 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-26 20:20:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 989 events. 573/989 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5189 event pairs, 440 based on Foata normal form. 22/999 useless extension candidates. Maximal degree in co-relation 2069. Up to 836 conditions per place. [2023-08-26 20:20:38,426 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 33 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-26 20:20:38,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 204 flow [2023-08-26 20:20:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-26 20:20:38,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610687022900763 [2023-08-26 20:20:38,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-26 20:20:38,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-26 20:20:38,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-26 20:20:38,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,431 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 110 flow. Second operand 3 states and 441 transitions. [2023-08-26 20:20:38,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 204 flow [2023-08-26 20:20:38,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:38,433 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 114 flow [2023-08-26 20:20:38,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-08-26 20:20:38,435 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-26 20:20:38,435 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 114 flow [2023-08-26 20:20:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:20:38,436 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:38,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -399641440, now seen corresponding path program 4 times [2023-08-26 20:20:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711616353] [2023-08-26 20:20:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,689 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 20:20:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711616353] [2023-08-26 20:20:38,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711616353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979494553] [2023-08-26 20:20:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:38,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 20:20:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 20:20:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,803 INFO L124 PetriNetUnfolderBase]: 575/985 cut-off events. [2023-08-26 20:20:38,803 INFO L125 PetriNetUnfolderBase]: For 233/236 co-relation queries the response was YES. [2023-08-26 20:20:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 985 events. 575/985 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5160 event pairs, 140 based on Foata normal form. 21/978 useless extension candidates. Maximal degree in co-relation 2137. Up to 840 conditions per place. [2023-08-26 20:20:38,808 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 35 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 20:20:38,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 217 flow [2023-08-26 20:20:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 20:20:38,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636132315521628 [2023-08-26 20:20:38,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 20:20:38,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,813 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 114 flow. Second operand 3 states and 443 transitions. [2023-08-26 20:20:38,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 217 flow [2023-08-26 20:20:38,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:38,815 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 118 flow [2023-08-26 20:20:38,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 20:20:38,816 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 20:20:38,816 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 118 flow [2023-08-26 20:20:38,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 20:20:38,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:38,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1219849210, now seen corresponding path program 5 times [2023-08-26 20:20:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726772237] [2023-08-26 20:20:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,765 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 20:20:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726772237] [2023-08-26 20:20:40,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726772237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:40,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:40,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:20:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841266488] [2023-08-26 20:20:40,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:20:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:20:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:20:40,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:20:40,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 118 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:20:40,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:43,185 INFO L124 PetriNetUnfolderBase]: 6056/9054 cut-off events. [2023-08-26 20:20:43,186 INFO L125 PetriNetUnfolderBase]: For 1871/1871 co-relation queries the response was YES. [2023-08-26 20:20:43,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 9054 events. 6056/9054 cut-off events. For 1871/1871 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 47459 event pairs, 1475 based on Foata normal form. 1/9053 useless extension candidates. Maximal degree in co-relation 19911. Up to 2954 conditions per place. [2023-08-26 20:20:43,227 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 189 selfloop transitions, 13 changer transitions 14/220 dead transitions. [2023-08-26 20:20:43,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 220 transitions, 987 flow [2023-08-26 20:20:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:20:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:20:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1715 transitions. [2023-08-26 20:20:43,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675572519083969 [2023-08-26 20:20:43,232 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1715 transitions. [2023-08-26 20:20:43,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1715 transitions. [2023-08-26 20:20:43,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:43,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1715 transitions. [2023-08-26 20:20:43,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 122.5) internal successors, (1715), 14 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,243 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,243 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 118 flow. Second operand 14 states and 1715 transitions. [2023-08-26 20:20:43,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 220 transitions, 987 flow [2023-08-26 20:20:43,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 220 transitions, 983 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:43,247 INFO L231 Difference]: Finished difference. Result has 84 places, 53 transitions, 219 flow [2023-08-26 20:20:43,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=219, PETRI_PLACES=84, PETRI_TRANSITIONS=53} [2023-08-26 20:20:43,248 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 14 predicate places. [2023-08-26 20:20:43,248 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 53 transitions, 219 flow [2023-08-26 20:20:43,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:43,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:43,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 20:20:43,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:43,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash 758869730, now seen corresponding path program 6 times [2023-08-26 20:20:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310706554] [2023-08-26 20:20:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:44,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:44,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310706554] [2023-08-26 20:20:44,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310706554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:44,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:44,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:20:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151990574] [2023-08-26 20:20:44,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:20:44,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:20:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:20:44,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:20:44,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 53 transitions, 219 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:44,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:44,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:20:44,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:49,092 INFO L124 PetriNetUnfolderBase]: 16045/24091 cut-off events. [2023-08-26 20:20:49,092 INFO L125 PetriNetUnfolderBase]: For 25646/25646 co-relation queries the response was YES. [2023-08-26 20:20:49,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72252 conditions, 24091 events. 16045/24091 cut-off events. For 25646/25646 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 154192 event pairs, 2645 based on Foata normal form. 1/24092 useless extension candidates. Maximal degree in co-relation 72232. Up to 6072 conditions per place. [2023-08-26 20:20:49,271 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 261 selfloop transitions, 25 changer transitions 9/299 dead transitions. [2023-08-26 20:20:49,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 299 transitions, 1785 flow [2023-08-26 20:20:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:20:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:20:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1730 transitions. [2023-08-26 20:20:49,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47164667393675025 [2023-08-26 20:20:49,276 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1730 transitions. [2023-08-26 20:20:49,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1730 transitions. [2023-08-26 20:20:49,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:49,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1730 transitions. [2023-08-26 20:20:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.57142857142857) internal successors, (1730), 14 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:49,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:49,286 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:49,286 INFO L175 Difference]: Start difference. First operand has 84 places, 53 transitions, 219 flow. Second operand 14 states and 1730 transitions. [2023-08-26 20:20:49,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 299 transitions, 1785 flow [2023-08-26 20:20:49,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 299 transitions, 1745 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-26 20:20:49,781 INFO L231 Difference]: Finished difference. Result has 104 places, 76 transitions, 480 flow [2023-08-26 20:20:49,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=480, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2023-08-26 20:20:49,782 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2023-08-26 20:20:49,782 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 480 flow [2023-08-26 20:20:49,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:49,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:49,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:49,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 20:20:49,783 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:49,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2044401006, now seen corresponding path program 7 times [2023-08-26 20:20:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:49,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964949414] [2023-08-26 20:20:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:51,382 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 20:20:51,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964949414] [2023-08-26 20:20:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964949414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:51,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:51,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:20:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827856468] [2023-08-26 20:20:51,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:20:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:20:51,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:20:51,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:20:51,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 480 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:51,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:51,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:20:51,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:56,572 INFO L124 PetriNetUnfolderBase]: 22687/35279 cut-off events. [2023-08-26 20:20:56,572 INFO L125 PetriNetUnfolderBase]: For 89703/89703 co-relation queries the response was YES. [2023-08-26 20:20:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127769 conditions, 35279 events. 22687/35279 cut-off events. For 89703/89703 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 252551 event pairs, 4699 based on Foata normal form. 1/35280 useless extension candidates. Maximal degree in co-relation 127739. Up to 9947 conditions per place. [2023-08-26 20:20:56,819 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 273 selfloop transitions, 38 changer transitions 9/324 dead transitions. [2023-08-26 20:20:56,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 324 transitions, 2440 flow [2023-08-26 20:20:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:20:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:20:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2023-08-26 20:20:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47055616139585604 [2023-08-26 20:20:56,824 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2023-08-26 20:20:56,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2023-08-26 20:20:56,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:56,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2023-08-26 20:20:56,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,834 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,834 INFO L175 Difference]: Start difference. First operand has 104 places, 76 transitions, 480 flow. Second operand 14 states and 1726 transitions. [2023-08-26 20:20:56,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 324 transitions, 2440 flow [2023-08-26 20:20:57,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 324 transitions, 2383 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:57,486 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 886 flow [2023-08-26 20:20:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2023-08-26 20:20:57,487 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 56 predicate places. [2023-08-26 20:20:57,487 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 886 flow [2023-08-26 20:20:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:57,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 20:20:57,488 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:57,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1983578792, now seen corresponding path program 8 times [2023-08-26 20:20:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707891341] [2023-08-26 20:20:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:59,097 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 20:20:59,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:59,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707891341] [2023-08-26 20:20:59,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707891341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:59,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:59,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:20:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040362527] [2023-08-26 20:20:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:20:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:20:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:20:59,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:20:59,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:59,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:59,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:20:59,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:06,406 INFO L124 PetriNetUnfolderBase]: 34000/53980 cut-off events. [2023-08-26 20:21:06,406 INFO L125 PetriNetUnfolderBase]: For 258252/258252 co-relation queries the response was YES. [2023-08-26 20:21:06,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230632 conditions, 53980 events. 34000/53980 cut-off events. For 258252/258252 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 426836 event pairs, 7701 based on Foata normal form. 1/53973 useless extension candidates. Maximal degree in co-relation 230591. Up to 16103 conditions per place. [2023-08-26 20:21:07,135 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 327 selfloop transitions, 59 changer transitions 9/399 dead transitions. [2023-08-26 20:21:07,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 399 transitions, 3701 flow [2023-08-26 20:21:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:21:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:21:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1733 transitions. [2023-08-26 20:21:07,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47246455834242096 [2023-08-26 20:21:07,141 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1733 transitions. [2023-08-26 20:21:07,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1733 transitions. [2023-08-26 20:21:07,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:07,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1733 transitions. [2023-08-26 20:21:07,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.78571428571429) internal successors, (1733), 14 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:07,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:07,150 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:07,150 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 886 flow. Second operand 14 states and 1733 transitions. [2023-08-26 20:21:07,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 399 transitions, 3701 flow [2023-08-26 20:21:10,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 399 transitions, 3607 flow, removed 41 selfloop flow, removed 2 redundant places. [2023-08-26 20:21:10,222 INFO L231 Difference]: Finished difference. Result has 148 places, 150 transitions, 1703 flow [2023-08-26 20:21:10,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1703, PETRI_PLACES=148, PETRI_TRANSITIONS=150} [2023-08-26 20:21:10,223 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2023-08-26 20:21:10,223 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 150 transitions, 1703 flow [2023-08-26 20:21:10,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:10,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:10,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:10,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 20:21:10,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:21:10,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1812170798, now seen corresponding path program 9 times [2023-08-26 20:21:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:10,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643029623] [2023-08-26 20:21:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:11,549 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 20:21:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:11,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643029623] [2023-08-26 20:21:11,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643029623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:11,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:11,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:21:11,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345762407] [2023-08-26 20:21:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:21:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:21:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:21:11,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:21:11,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 150 transitions, 1703 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:11,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:11,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:21:11,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:20,400 INFO L124 PetriNetUnfolderBase]: 38036/61128 cut-off events. [2023-08-26 20:21:20,401 INFO L125 PetriNetUnfolderBase]: For 460525/460525 co-relation queries the response was YES. [2023-08-26 20:21:21,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297322 conditions, 61128 events. 38036/61128 cut-off events. For 460525/460525 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 501223 event pairs, 10089 based on Foata normal form. 1/61129 useless extension candidates. Maximal degree in co-relation 297270. Up to 18017 conditions per place. [2023-08-26 20:21:21,205 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 325 selfloop transitions, 79 changer transitions 11/419 dead transitions. [2023-08-26 20:21:21,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 419 transitions, 4551 flow [2023-08-26 20:21:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:21:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:21:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1732 transitions. [2023-08-26 20:21:21,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721919302071974 [2023-08-26 20:21:21,213 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1732 transitions. [2023-08-26 20:21:21,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1732 transitions. [2023-08-26 20:21:21,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:21,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1732 transitions. [2023-08-26 20:21:21,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.71428571428571) internal successors, (1732), 14 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:21,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:21,231 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:21,231 INFO L175 Difference]: Start difference. First operand has 148 places, 150 transitions, 1703 flow. Second operand 14 states and 1732 transitions. [2023-08-26 20:21:21,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 419 transitions, 4551 flow [2023-08-26 20:21:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 419 transitions, 4451 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:26,350 INFO L231 Difference]: Finished difference. Result has 171 places, 182 transitions, 2430 flow [2023-08-26 20:21:26,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2430, PETRI_PLACES=171, PETRI_TRANSITIONS=182} [2023-08-26 20:21:26,351 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 101 predicate places. [2023-08-26 20:21:26,351 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 182 transitions, 2430 flow [2023-08-26 20:21:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:26,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:26,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 20:21:26,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:21:26,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1842155896, now seen corresponding path program 10 times [2023-08-26 20:21:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550657922] [2023-08-26 20:21:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:27,676 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 20:21:27,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:27,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550657922] [2023-08-26 20:21:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550657922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:27,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:21:27,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856048790] [2023-08-26 20:21:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:27,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:21:27,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:21:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:21:27,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:21:27,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 182 transitions, 2430 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:27,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:27,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:21:27,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:44,991 INFO L124 PetriNetUnfolderBase]: 64588/108468 cut-off events. [2023-08-26 20:21:44,991 INFO L125 PetriNetUnfolderBase]: For 1246009/1246009 co-relation queries the response was YES. [2023-08-26 20:21:46,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591259 conditions, 108468 events. 64588/108468 cut-off events. For 1246009/1246009 co-relation queries the response was YES. Maximal size of possible extension queue 4506. Compared 1032289 event pairs, 16497 based on Foata normal form. 1/108461 useless extension candidates. Maximal degree in co-relation 591195. Up to 29870 conditions per place. [2023-08-26 20:21:46,553 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 630 selfloop transitions, 94 changer transitions 10/738 dead transitions. [2023-08-26 20:21:46,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 738 transitions, 10895 flow [2023-08-26 20:21:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:21:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:21:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1737 transitions. [2023-08-26 20:21:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47355507088331517 [2023-08-26 20:21:46,557 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1737 transitions. [2023-08-26 20:21:46,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1737 transitions. [2023-08-26 20:21:46,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:46,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1737 transitions. [2023-08-26 20:21:46,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:46,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:46,566 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:46,566 INFO L175 Difference]: Start difference. First operand has 171 places, 182 transitions, 2430 flow. Second operand 14 states and 1737 transitions. [2023-08-26 20:21:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 738 transitions, 10895 flow [2023-08-26 20:22:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 738 transitions, 10598 flow, removed 138 selfloop flow, removed 3 redundant places. [2023-08-26 20:22:18,695 INFO L231 Difference]: Finished difference. Result has 192 places, 250 transitions, 3863 flow [2023-08-26 20:22:18,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3863, PETRI_PLACES=192, PETRI_TRANSITIONS=250} [2023-08-26 20:22:18,695 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 122 predicate places. [2023-08-26 20:22:18,695 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 250 transitions, 3863 flow [2023-08-26 20:22:18,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:22:18,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:22:18,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:22:18,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 20:22:18,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:22:18,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:22:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2074017058, now seen corresponding path program 11 times [2023-08-26 20:22:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:22:18,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580413440] [2023-08-26 20:22:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:22:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:22:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:22:20,092 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 20:22:20,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:22:20,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580413440] [2023-08-26 20:22:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580413440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:22:20,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:22:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:22:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195432882] [2023-08-26 20:22:20,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:22:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:22:20,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:22:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:22:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:22:20,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:22:20,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 250 transitions, 3863 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:22:20,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:22:20,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:22:20,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:22:42,306 INFO L124 PetriNetUnfolderBase]: 69303/117879 cut-off events. [2023-08-26 20:22:42,306 INFO L125 PetriNetUnfolderBase]: For 1651973/1651973 co-relation queries the response was YES. [2023-08-26 20:22:43,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695377 conditions, 117879 events. 69303/117879 cut-off events. For 1651973/1651973 co-relation queries the response was YES. Maximal size of possible extension queue 4994. Compared 1151178 event pairs, 18787 based on Foata normal form. 1/117880 useless extension candidates. Maximal degree in co-relation 695303. Up to 42695 conditions per place. [2023-08-26 20:22:44,163 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 463 selfloop transitions, 93 changer transitions 11/571 dead transitions. [2023-08-26 20:22:44,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 571 transitions, 8395 flow [2023-08-26 20:22:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:22:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:22:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1732 transitions. [2023-08-26 20:22:44,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721919302071974 [2023-08-26 20:22:44,167 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1732 transitions. [2023-08-26 20:22:44,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1732 transitions. [2023-08-26 20:22:44,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:22:44,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1732 transitions. [2023-08-26 20:22:44,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.71428571428571) internal successors, (1732), 14 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:22:44,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:22:44,174 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:22:44,174 INFO L175 Difference]: Start difference. First operand has 192 places, 250 transitions, 3863 flow. Second operand 14 states and 1732 transitions. [2023-08-26 20:22:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 571 transitions, 8395 flow [2023-08-26 20:23:11,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 571 transitions, 7999 flow, removed 188 selfloop flow, removed 2 redundant places. [2023-08-26 20:23:11,401 INFO L231 Difference]: Finished difference. Result has 212 places, 286 transitions, 4692 flow [2023-08-26 20:23:11,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4692, PETRI_PLACES=212, PETRI_TRANSITIONS=286} [2023-08-26 20:23:11,402 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 142 predicate places. [2023-08-26 20:23:11,402 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 286 transitions, 4692 flow [2023-08-26 20:23:11,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:23:11,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:23:11,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:23:11,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 20:23:11,403 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:23:11,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:23:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1326301594, now seen corresponding path program 12 times [2023-08-26 20:23:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:23:11,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464612832] [2023-08-26 20:23:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:23:11,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:23:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:23:12,582 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 20:23:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:23:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464612832] [2023-08-26 20:23:12,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464612832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:23:12,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:23:12,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:23:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109126052] [2023-08-26 20:23:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:23:12,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:23:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:23:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:23:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:23:12,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:23:12,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 286 transitions, 4692 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:23:12,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:23:12,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:23:12,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:23:44,095 INFO L124 PetriNetUnfolderBase]: 82623/145526 cut-off events. [2023-08-26 20:23:44,095 INFO L125 PetriNetUnfolderBase]: For 2416008/2416008 co-relation queries the response was YES. [2023-08-26 20:23:45,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882236 conditions, 145526 events. 82623/145526 cut-off events. For 2416008/2416008 co-relation queries the response was YES. Maximal size of possible extension queue 6548. Compared 1536081 event pairs, 26587 based on Foata normal form. 1/145519 useless extension candidates. Maximal degree in co-relation 882153. Up to 54504 conditions per place. [2023-08-26 20:23:46,280 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 753 selfloop transitions, 138 changer transitions 18/913 dead transitions. [2023-08-26 20:23:46,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 913 transitions, 15874 flow [2023-08-26 20:23:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:23:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:23:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1741 transitions. [2023-08-26 20:23:46,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47464558342420937 [2023-08-26 20:23:46,283 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1741 transitions. [2023-08-26 20:23:46,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1741 transitions. [2023-08-26 20:23:46,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:23:46,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1741 transitions. [2023-08-26 20:23:46,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.35714285714286) internal successors, (1741), 14 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:23:46,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:23:46,290 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:23:46,290 INFO L175 Difference]: Start difference. First operand has 212 places, 286 transitions, 4692 flow. Second operand 14 states and 1741 transitions. [2023-08-26 20:23:46,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 913 transitions, 15874 flow [2023-08-26 20:24:45,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 913 transitions, 15372 flow, removed 171 selfloop flow, removed 4 redundant places. [2023-08-26 20:24:45,910 INFO L231 Difference]: Finished difference. Result has 231 places, 375 transitions, 6765 flow [2023-08-26 20:24:45,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6765, PETRI_PLACES=231, PETRI_TRANSITIONS=375} [2023-08-26 20:24:45,911 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 161 predicate places. [2023-08-26 20:24:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 375 transitions, 6765 flow [2023-08-26 20:24:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:24:45,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:24:45,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:24:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 20:24:45,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:24:45,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:24:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 629525032, now seen corresponding path program 13 times [2023-08-26 20:24:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:24:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616269507] [2023-08-26 20:24:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:24:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:24:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:24:46,994 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 20:24:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:24:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616269507] [2023-08-26 20:24:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616269507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:24:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:24:46,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 20:24:46,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900760426] [2023-08-26 20:24:46,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:24:46,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:24:46,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:24:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:24:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:24:46,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 20:24:46,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 375 transitions, 6765 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:24:46,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:24:46,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 20:24:46,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand