/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:25:22,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:25:22,785 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 15:25:22,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:25:22,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:25:22,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:25:22,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:25:22,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:25:22,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:25:22,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:25:22,830 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:25:22,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:25:22,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:25:22,831 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:25:22,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:25:22,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:25:22,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:25:22,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:25:22,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:25:22,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:25:22,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:25:22,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:25:22,834 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:25:22,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:25:22,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:25:22,835 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:25:22,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:25:22,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:25:22,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:25:22,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:25:22,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:25:22,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:25:22,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:25:22,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:25:22,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:25:22,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:25:23,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:25:23,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:25:23,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:25:23,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:25:23,165 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:25:23,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2023-08-26 15:25:24,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:25:24,574 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:25:24,575 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2023-08-26 15:25:24,592 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87e5623b7/4341e45b602f4132ae183655b07ae85f/FLAG7b16f9e07 [2023-08-26 15:25:24,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87e5623b7/4341e45b602f4132ae183655b07ae85f [2023-08-26 15:25:24,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:25:24,606 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:25:24,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:25:24,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:25:24,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:25:24,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:25:24" (1/1) ... [2023-08-26 15:25:24,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee8ad10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:24, skipping insertion in model container [2023-08-26 15:25:24,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:25:24" (1/1) ... [2023-08-26 15:25:24,660 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:25:25,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:25:25,053 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:25:25,083 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:25:25,085 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:25:25,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:25:25,164 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:25:25,164 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:25:25,170 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:25:25,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25 WrapperNode [2023-08-26 15:25:25,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:25:25,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:25:25,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:25:25,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:25:25,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,239 INFO L138 Inliner]: procedures = 176, calls = 61, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 179 [2023-08-26 15:25:25,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:25:25,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:25:25,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:25:25,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:25:25,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:25:25,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:25:25,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:25:25,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:25:25,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (1/1) ... [2023-08-26 15:25:25,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:25:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:25:25,330 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 15:25:25,353 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 15:25:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:25:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:25:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:25:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:25:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:25:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:25:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:25:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:25:25,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:25:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:25:25,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:25:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:25:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:25:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:25:25,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:25:25,375 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 15:25:25,525 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:25:25,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:25:25,967 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:25:26,204 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:25:26,205 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:25:26,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:25:26 BoogieIcfgContainer [2023-08-26 15:25:26,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:25:26,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:25:26,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:25:26,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:25:26,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:25:24" (1/3) ... [2023-08-26 15:25:26,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7fd4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:25:26, skipping insertion in model container [2023-08-26 15:25:26,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:25:25" (2/3) ... [2023-08-26 15:25:26,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7fd4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:25:26, skipping insertion in model container [2023-08-26 15:25:26,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:25:26" (3/3) ... [2023-08-26 15:25:26,216 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2023-08-26 15:25:26,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:25:26,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-26 15:25:26,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:25:26,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:25:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 122 transitions, 259 flow [2023-08-26 15:25:26,420 INFO L124 PetriNetUnfolderBase]: 3/119 cut-off events. [2023-08-26 15:25:26,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:25:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 119 events. 3/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-08-26 15:25:26,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 122 transitions, 259 flow [2023-08-26 15:25:26,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 119 transitions, 247 flow [2023-08-26 15:25:26,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:25:26,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 119 transitions, 247 flow [2023-08-26 15:25:26,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 119 transitions, 247 flow [2023-08-26 15:25:26,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 119 transitions, 247 flow [2023-08-26 15:25:26,468 INFO L124 PetriNetUnfolderBase]: 3/119 cut-off events. [2023-08-26 15:25:26,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:25:26,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 119 events. 3/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-08-26 15:25:26,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 2498 [2023-08-26 15:25:31,130 INFO L134 LiptonReduction]: Checked pairs total: 7961 [2023-08-26 15:25:31,131 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-26 15:25:31,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:25:31,148 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;@7b87e5b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:25:31,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-26 15:25:31,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:25:31,150 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 15:25:31,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:25:31,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:31,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:25:31,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:31,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash 650, now seen corresponding path program 1 times [2023-08-26 15:25:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595322988] [2023-08-26 15:25:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:31,255 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 15:25:31,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595322988] [2023-08-26 15:25:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595322988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:25:31,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887912382] [2023-08-26 15:25:31,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:25:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:25:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:25:31,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 243 [2023-08-26 15:25:31,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:31,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:31,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 243 [2023-08-26 15:25:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:32,016 INFO L124 PetriNetUnfolderBase]: 2512/3635 cut-off events. [2023-08-26 15:25:32,017 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-26 15:25:32,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7345 conditions, 3635 events. 2512/3635 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16562 event pairs, 2512 based on Foata normal form. 0/3274 useless extension candidates. Maximal degree in co-relation 7334. Up to 3634 conditions per place. [2023-08-26 15:25:32,038 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 25 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 15:25:32,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 111 flow [2023-08-26 15:25:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:25:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:25:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 237 transitions. [2023-08-26 15:25:32,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2023-08-26 15:25:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 237 transitions. [2023-08-26 15:25:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 237 transitions. [2023-08-26 15:25:32,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:32,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 237 transitions. [2023-08-26 15:25:32,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 118.5) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,061 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,062 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 2 states and 237 transitions. [2023-08-26 15:25:32,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 111 flow [2023-08-26 15:25:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:25:32,066 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 58 flow [2023-08-26 15:25:32,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-26 15:25:32,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 15:25:32,071 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 58 flow [2023-08-26 15:25:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:32,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:32,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:25:32,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:32,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:32,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1917472490, now seen corresponding path program 1 times [2023-08-26 15:25:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:32,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426391532] [2023-08-26 15:25:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:32,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:32,434 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 15:25:32,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:32,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426391532] [2023-08-26 15:25:32,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426391532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:32,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:32,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:25:32,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155055014] [2023-08-26 15:25:32,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:32,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:25:32,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:25:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:25:32,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 243 [2023-08-26 15:25:32,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:32,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 243 [2023-08-26 15:25:32,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:32,948 INFO L124 PetriNetUnfolderBase]: 2147/3120 cut-off events. [2023-08-26 15:25:32,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:25:32,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6313 conditions, 3120 events. 2147/3120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14561 event pairs, 322 based on Foata normal form. 0/2939 useless extension candidates. Maximal degree in co-relation 6310. Up to 2576 conditions per place. [2023-08-26 15:25:32,963 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 33 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-26 15:25:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 156 flow [2023-08-26 15:25:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:25:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:25:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-26 15:25:32,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718792866941015 [2023-08-26 15:25:32,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-26 15:25:32,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-26 15:25:32,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:32,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-26 15:25:32,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,971 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 58 flow. Second operand 3 states and 344 transitions. [2023-08-26 15:25:32,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 156 flow [2023-08-26 15:25:32,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:25:32,973 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 58 flow [2023-08-26 15:25:32,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 15:25:32,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 15:25:32,974 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 58 flow [2023-08-26 15:25:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:32,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:32,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:32,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:25:32,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:32,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash -150069699, now seen corresponding path program 1 times [2023-08-26 15:25:32,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:32,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286843663] [2023-08-26 15:25:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:33,226 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 15:25:33,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286843663] [2023-08-26 15:25:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286843663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:33,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:33,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:25:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152001511] [2023-08-26 15:25:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:25:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:25:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:25:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 243 [2023-08-26 15:25:33,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 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 15:25:33,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:33,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 243 [2023-08-26 15:25:33,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:33,526 INFO L124 PetriNetUnfolderBase]: 1466/2169 cut-off events. [2023-08-26 15:25:33,527 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-26 15:25:33,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 2169 events. 1466/2169 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9224 event pairs, 698 based on Foata normal form. 90/2258 useless extension candidates. Maximal degree in co-relation 4499. Up to 1189 conditions per place. [2023-08-26 15:25:33,538 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-26 15:25:33,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 148 flow [2023-08-26 15:25:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:25:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:25:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-26 15:25:33,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776406035665297 [2023-08-26 15:25:33,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-26 15:25:33,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-26 15:25:33,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:33,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-26 15:25:33,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:33,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:33,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:33,545 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 58 flow. Second operand 3 states and 341 transitions. [2023-08-26 15:25:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 148 flow [2023-08-26 15:25:33,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:25:33,548 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 62 flow [2023-08-26 15:25:33,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 15:25:33,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 15:25:33,550 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 62 flow [2023-08-26 15:25:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 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 15:25:33,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:33,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:25:33,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:33,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 278612808, now seen corresponding path program 1 times [2023-08-26 15:25:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658716375] [2023-08-26 15:25:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:34,473 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 15:25:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658716375] [2023-08-26 15:25:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658716375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:34,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:25:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605642023] [2023-08-26 15:25:34,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:25:34,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:25:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:25:34,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 15:25:34,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 15:25:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:35,044 INFO L124 PetriNetUnfolderBase]: 2031/3004 cut-off events. [2023-08-26 15:25:35,045 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-26 15:25:35,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6506 conditions, 3004 events. 2031/3004 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14065 event pairs, 692 based on Foata normal form. 30/3034 useless extension candidates. Maximal degree in co-relation 6501. Up to 2386 conditions per place. [2023-08-26 15:25:35,060 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 39 selfloop transitions, 19 changer transitions 0/59 dead transitions. [2023-08-26 15:25:35,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 255 flow [2023-08-26 15:25:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-26 15:25:35,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355281207133059 [2023-08-26 15:25:35,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-26 15:25:35,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-26 15:25:35,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:35,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-26 15:25:35,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:35,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:35,068 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:35,068 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 62 flow. Second operand 6 states and 635 transitions. [2023-08-26 15:25:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 255 flow [2023-08-26 15:25:35,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:25:35,079 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 175 flow [2023-08-26 15:25:35,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-26 15:25:35,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 15:25:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 175 flow [2023-08-26 15:25:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:35,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:25:35,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:35,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash 275131818, now seen corresponding path program 2 times [2023-08-26 15:25:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017721938] [2023-08-26 15:25:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:36,220 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 15:25:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017721938] [2023-08-26 15:25:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017721938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:36,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:36,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:25:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994452048] [2023-08-26 15:25:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:25:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:25:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:25:36,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 243 [2023-08-26 15:25:36,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:36,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:36,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 243 [2023-08-26 15:25:36,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:36,964 INFO L124 PetriNetUnfolderBase]: 2230/3295 cut-off events. [2023-08-26 15:25:36,964 INFO L125 PetriNetUnfolderBase]: For 1841/1841 co-relation queries the response was YES. [2023-08-26 15:25:36,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 3295 events. 2230/3295 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15467 event pairs, 585 based on Foata normal form. 16/3311 useless extension candidates. Maximal degree in co-relation 9931. Up to 2982 conditions per place. [2023-08-26 15:25:36,982 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 66 selfloop transitions, 41 changer transitions 0/108 dead transitions. [2023-08-26 15:25:36,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 108 transitions, 649 flow [2023-08-26 15:25:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:25:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:25:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 847 transitions. [2023-08-26 15:25:36,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43569958847736623 [2023-08-26 15:25:36,985 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 847 transitions. [2023-08-26 15:25:36,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 847 transitions. [2023-08-26 15:25:36,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:36,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 847 transitions. [2023-08-26 15:25:36,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:36,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:36,992 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:36,992 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 175 flow. Second operand 8 states and 847 transitions. [2023-08-26 15:25:36,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 108 transitions, 649 flow [2023-08-26 15:25:36,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 108 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:25:36,997 INFO L231 Difference]: Finished difference. Result has 50 places, 78 transitions, 518 flow [2023-08-26 15:25:36,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=518, PETRI_PLACES=50, PETRI_TRANSITIONS=78} [2023-08-26 15:25:36,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-26 15:25:36,999 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 78 transitions, 518 flow [2023-08-26 15:25:37,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:37,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:37,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:25:37,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:37,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash 275239698, now seen corresponding path program 3 times [2023-08-26 15:25:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:37,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39662065] [2023-08-26 15:25:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:37,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:37,540 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 15:25:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39662065] [2023-08-26 15:25:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39662065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:37,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:37,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:25:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364909290] [2023-08-26 15:25:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:37,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:25:37,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:25:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:25:37,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 243 [2023-08-26 15:25:37,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 78 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:37,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:37,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 243 [2023-08-26 15:25:37,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:38,347 INFO L124 PetriNetUnfolderBase]: 3365/4996 cut-off events. [2023-08-26 15:25:38,347 INFO L125 PetriNetUnfolderBase]: For 6961/6961 co-relation queries the response was YES. [2023-08-26 15:25:38,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18355 conditions, 4996 events. 3365/4996 cut-off events. For 6961/6961 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25823 event pairs, 614 based on Foata normal form. 30/5026 useless extension candidates. Maximal degree in co-relation 18344. Up to 2415 conditions per place. [2023-08-26 15:25:38,386 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 118 selfloop transitions, 42 changer transitions 0/161 dead transitions. [2023-08-26 15:25:38,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 161 transitions, 1346 flow [2023-08-26 15:25:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:25:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:25:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-26 15:25:38,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-08-26 15:25:38,389 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-26 15:25:38,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-26 15:25:38,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:38,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-26 15:25:38,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:38,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:38,393 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:38,393 INFO L175 Difference]: Start difference. First operand has 50 places, 78 transitions, 518 flow. Second operand 5 states and 558 transitions. [2023-08-26 15:25:38,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 161 transitions, 1346 flow [2023-08-26 15:25:38,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 161 transitions, 1264 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-26 15:25:38,428 INFO L231 Difference]: Finished difference. Result has 55 places, 111 transitions, 920 flow [2023-08-26 15:25:38,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=920, PETRI_PLACES=55, PETRI_TRANSITIONS=111} [2023-08-26 15:25:38,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-26 15:25:38,431 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 111 transitions, 920 flow [2023-08-26 15:25:38,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:38,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:38,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:38,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:25:38,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:38,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2121013037, now seen corresponding path program 1 times [2023-08-26 15:25:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:38,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116869785] [2023-08-26 15:25:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:38,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:39,494 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 15:25:39,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116869785] [2023-08-26 15:25:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116869785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313084247] [2023-08-26 15:25:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:39,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 15:25:39,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 111 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:39,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:39,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 15:25:39,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:40,870 INFO L124 PetriNetUnfolderBase]: 4881/7384 cut-off events. [2023-08-26 15:25:40,870 INFO L125 PetriNetUnfolderBase]: For 15751/15751 co-relation queries the response was YES. [2023-08-26 15:25:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31589 conditions, 7384 events. 4881/7384 cut-off events. For 15751/15751 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42232 event pairs, 784 based on Foata normal form. 46/7430 useless extension candidates. Maximal degree in co-relation 31575. Up to 4542 conditions per place. [2023-08-26 15:25:40,921 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 150 selfloop transitions, 56 changer transitions 0/207 dead transitions. [2023-08-26 15:25:40,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 207 transitions, 1986 flow [2023-08-26 15:25:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-26 15:25:40,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355281207133059 [2023-08-26 15:25:40,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-26 15:25:40,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-26 15:25:40,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:40,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-26 15:25:40,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:40,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:40,928 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:40,928 INFO L175 Difference]: Start difference. First operand has 55 places, 111 transitions, 920 flow. Second operand 6 states and 635 transitions. [2023-08-26 15:25:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 207 transitions, 1986 flow [2023-08-26 15:25:40,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 207 transitions, 1957 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:25:40,992 INFO L231 Difference]: Finished difference. Result has 63 places, 158 transitions, 1599 flow [2023-08-26 15:25:40,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1599, PETRI_PLACES=63, PETRI_TRANSITIONS=158} [2023-08-26 15:25:40,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-08-26 15:25:40,993 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 158 transitions, 1599 flow [2023-08-26 15:25:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:40,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:40,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:25:40,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:40,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -17583499, now seen corresponding path program 2 times [2023-08-26 15:25:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697883451] [2023-08-26 15:25:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:41,742 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 15:25:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697883451] [2023-08-26 15:25:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697883451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326181963] [2023-08-26 15:25:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 15:25:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 158 transitions, 1599 flow. Second operand has 8 states, 8 states have (on average 95.625) internal successors, (765), 8 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 15:25:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:43,104 INFO L124 PetriNetUnfolderBase]: 6064/9259 cut-off events. [2023-08-26 15:25:43,105 INFO L125 PetriNetUnfolderBase]: For 45583/45583 co-relation queries the response was YES. [2023-08-26 15:25:43,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45959 conditions, 9259 events. 6064/9259 cut-off events. For 45583/45583 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 56266 event pairs, 1169 based on Foata normal form. 308/9567 useless extension candidates. Maximal degree in co-relation 45941. Up to 5303 conditions per place. [2023-08-26 15:25:43,159 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 134 selfloop transitions, 101 changer transitions 10/246 dead transitions. [2023-08-26 15:25:43,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 246 transitions, 2709 flow [2023-08-26 15:25:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:25:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:25:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 949 transitions. [2023-08-26 15:25:43,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43392775491540925 [2023-08-26 15:25:43,163 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 949 transitions. [2023-08-26 15:25:43,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 949 transitions. [2023-08-26 15:25:43,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:43,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 949 transitions. [2023-08-26 15:25:43,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:43,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:43,169 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:43,169 INFO L175 Difference]: Start difference. First operand has 63 places, 158 transitions, 1599 flow. Second operand 9 states and 949 transitions. [2023-08-26 15:25:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 246 transitions, 2709 flow [2023-08-26 15:25:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 246 transitions, 2681 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-08-26 15:25:43,259 INFO L231 Difference]: Finished difference. Result has 73 places, 169 transitions, 1949 flow [2023-08-26 15:25:43,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1949, PETRI_PLACES=73, PETRI_TRANSITIONS=169} [2023-08-26 15:25:43,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-08-26 15:25:43,260 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 169 transitions, 1949 flow [2023-08-26 15:25:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.625) internal successors, (765), 8 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:43,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:43,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:25:43,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:43,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -59588809, now seen corresponding path program 3 times [2023-08-26 15:25:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220778718] [2023-08-26 15:25:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:25:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220778718] [2023-08-26 15:25:43,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220778718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:43,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:43,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:43,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035617138] [2023-08-26 15:25:43,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:43,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:43,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 243 [2023-08-26 15:25:43,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 169 transitions, 1949 flow. Second operand has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:43,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:43,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 243 [2023-08-26 15:25:43,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:45,475 INFO L124 PetriNetUnfolderBase]: 6618/10269 cut-off events. [2023-08-26 15:25:45,476 INFO L125 PetriNetUnfolderBase]: For 52537/52537 co-relation queries the response was YES. [2023-08-26 15:25:45,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53707 conditions, 10269 events. 6618/10269 cut-off events. For 52537/52537 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 65351 event pairs, 875 based on Foata normal form. 88/10357 useless extension candidates. Maximal degree in co-relation 53686. Up to 5173 conditions per place. [2023-08-26 15:25:45,612 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 110 selfloop transitions, 139 changer transitions 1/251 dead transitions. [2023-08-26 15:25:45,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 251 transitions, 3101 flow [2023-08-26 15:25:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:25:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:25:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 955 transitions. [2023-08-26 15:25:45,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366712391403749 [2023-08-26 15:25:45,615 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 955 transitions. [2023-08-26 15:25:45,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 955 transitions. [2023-08-26 15:25:45,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:45,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 955 transitions. [2023-08-26 15:25:45,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.11111111111111) internal successors, (955), 9 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:45,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:45,625 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:45,625 INFO L175 Difference]: Start difference. First operand has 73 places, 169 transitions, 1949 flow. Second operand 9 states and 955 transitions. [2023-08-26 15:25:45,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 251 transitions, 3101 flow [2023-08-26 15:25:45,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 251 transitions, 2968 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-26 15:25:45,743 INFO L231 Difference]: Finished difference. Result has 81 places, 207 transitions, 2769 flow [2023-08-26 15:25:45,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2769, PETRI_PLACES=81, PETRI_TRANSITIONS=207} [2023-08-26 15:25:45,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2023-08-26 15:25:45,745 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 207 transitions, 2769 flow [2023-08-26 15:25:45,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:45,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:45,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:45,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:25:45,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:45,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:45,747 INFO L85 PathProgramCache]: Analyzing trace with hash -60914989, now seen corresponding path program 4 times [2023-08-26 15:25:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:45,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670678472] [2023-08-26 15:25:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:45,905 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 15:25:45,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670678472] [2023-08-26 15:25:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670678472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:45,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:25:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227583821] [2023-08-26 15:25:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:25:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:25:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:25:45,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 15:25:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 207 transitions, 2769 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 15:25:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:46,901 INFO L124 PetriNetUnfolderBase]: 3924/6460 cut-off events. [2023-08-26 15:25:46,902 INFO L125 PetriNetUnfolderBase]: For 58594/58594 co-relation queries the response was YES. [2023-08-26 15:25:46,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37713 conditions, 6460 events. 3924/6460 cut-off events. For 58594/58594 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42218 event pairs, 710 based on Foata normal form. 672/7131 useless extension candidates. Maximal degree in co-relation 37688. Up to 2754 conditions per place. [2023-08-26 15:25:46,935 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 321 selfloop transitions, 5 changer transitions 6/333 dead transitions. [2023-08-26 15:25:46,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 333 transitions, 5199 flow [2023-08-26 15:25:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:25:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:25:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 442 transitions. [2023-08-26 15:25:46,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547325102880658 [2023-08-26 15:25:46,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 442 transitions. [2023-08-26 15:25:46,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 442 transitions. [2023-08-26 15:25:46,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:46,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 442 transitions. [2023-08-26 15:25:46,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:46,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:46,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:46,942 INFO L175 Difference]: Start difference. First operand has 81 places, 207 transitions, 2769 flow. Second operand 4 states and 442 transitions. [2023-08-26 15:25:46,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 333 transitions, 5199 flow [2023-08-26 15:25:47,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 333 transitions, 5032 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-08-26 15:25:47,065 INFO L231 Difference]: Finished difference. Result has 83 places, 173 transitions, 2260 flow [2023-08-26 15:25:47,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2260, PETRI_PLACES=83, PETRI_TRANSITIONS=173} [2023-08-26 15:25:47,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2023-08-26 15:25:47,066 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 173 transitions, 2260 flow [2023-08-26 15:25:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:47,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:25:47,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:47,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash 524377912, now seen corresponding path program 1 times [2023-08-26 15:25:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937294195] [2023-08-26 15:25:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:47,259 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 15:25:47,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937294195] [2023-08-26 15:25:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937294195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:47,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:47,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:25:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583052499] [2023-08-26 15:25:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:47,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:25:47,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:25:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:25:47,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 15:25:47,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 173 transitions, 2260 flow. Second operand has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:47,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 15:25:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:47,837 INFO L124 PetriNetUnfolderBase]: 1685/2946 cut-off events. [2023-08-26 15:25:47,837 INFO L125 PetriNetUnfolderBase]: For 30449/30449 co-relation queries the response was YES. [2023-08-26 15:25:47,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18273 conditions, 2946 events. 1685/2946 cut-off events. For 30449/30449 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17812 event pairs, 173 based on Foata normal form. 312/3257 useless extension candidates. Maximal degree in co-relation 18246. Up to 1338 conditions per place. [2023-08-26 15:25:47,854 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 273 selfloop transitions, 8 changer transitions 10/292 dead transitions. [2023-08-26 15:25:47,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 292 transitions, 4398 flow [2023-08-26 15:25:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:25:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:25:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-26 15:25:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45596707818930043 [2023-08-26 15:25:47,856 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-26 15:25:47,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-26 15:25:47,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:47,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-26 15:25:47,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,861 INFO L175 Difference]: Start difference. First operand has 83 places, 173 transitions, 2260 flow. Second operand 5 states and 554 transitions. [2023-08-26 15:25:47,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 292 transitions, 4398 flow [2023-08-26 15:25:47,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 292 transitions, 4324 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-26 15:25:47,899 INFO L231 Difference]: Finished difference. Result has 86 places, 146 transitions, 1849 flow [2023-08-26 15:25:47,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1849, PETRI_PLACES=86, PETRI_TRANSITIONS=146} [2023-08-26 15:25:47,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-26 15:25:47,900 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 146 transitions, 1849 flow [2023-08-26 15:25:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:47,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:47,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:47,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:25:47,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:47,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1848309091, now seen corresponding path program 1 times [2023-08-26 15:25:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324059894] [2023-08-26 15:25:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:47,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:49,235 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 15:25:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324059894] [2023-08-26 15:25:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324059894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:49,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:49,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 15:25:49,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284656111] [2023-08-26 15:25:49,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:49,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 15:25:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 15:25:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:25:49,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 243 [2023-08-26 15:25:49,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 146 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:49,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:49,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 243 [2023-08-26 15:25:49,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:49,855 INFO L124 PetriNetUnfolderBase]: 1367/2490 cut-off events. [2023-08-26 15:25:49,855 INFO L125 PetriNetUnfolderBase]: For 20449/20449 co-relation queries the response was YES. [2023-08-26 15:25:49,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2490 events. 1367/2490 cut-off events. For 20449/20449 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14753 event pairs, 176 based on Foata normal form. 12/2502 useless extension candidates. Maximal degree in co-relation 16229. Up to 1657 conditions per place. [2023-08-26 15:25:49,871 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 136 selfloop transitions, 55 changer transitions 12/204 dead transitions. [2023-08-26 15:25:49,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 204 transitions, 2781 flow [2023-08-26 15:25:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 627 transitions. [2023-08-26 15:25:49,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004115226337447 [2023-08-26 15:25:49,874 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 627 transitions. [2023-08-26 15:25:49,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 627 transitions. [2023-08-26 15:25:49,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:49,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 627 transitions. [2023-08-26 15:25:49,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.5) internal successors, (627), 6 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:49,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:49,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:49,879 INFO L175 Difference]: Start difference. First operand has 86 places, 146 transitions, 1849 flow. Second operand 6 states and 627 transitions. [2023-08-26 15:25:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 204 transitions, 2781 flow [2023-08-26 15:25:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 204 transitions, 2667 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-26 15:25:49,934 INFO L231 Difference]: Finished difference. Result has 87 places, 156 transitions, 2098 flow [2023-08-26 15:25:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2098, PETRI_PLACES=87, PETRI_TRANSITIONS=156} [2023-08-26 15:25:49,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2023-08-26 15:25:49,935 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 156 transitions, 2098 flow [2023-08-26 15:25:49,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:49,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:49,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:49,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:25:49,936 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:49,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1071785673, now seen corresponding path program 2 times [2023-08-26 15:25:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511203740] [2023-08-26 15:25:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:50,914 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 15:25:50,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:50,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511203740] [2023-08-26 15:25:50,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511203740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:50,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:50,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:50,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025815648] [2023-08-26 15:25:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:50,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:50,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 15:25:50,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 156 transitions, 2098 flow. Second operand has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 15:25:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:51,616 INFO L124 PetriNetUnfolderBase]: 1425/2611 cut-off events. [2023-08-26 15:25:51,616 INFO L125 PetriNetUnfolderBase]: For 24410/24410 co-relation queries the response was YES. [2023-08-26 15:25:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17265 conditions, 2611 events. 1425/2611 cut-off events. For 24410/24410 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15892 event pairs, 280 based on Foata normal form. 23/2632 useless extension candidates. Maximal degree in co-relation 17238. Up to 1045 conditions per place. [2023-08-26 15:25:51,630 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 116 selfloop transitions, 42 changer transitions 56/215 dead transitions. [2023-08-26 15:25:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 215 transitions, 2971 flow [2023-08-26 15:25:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:25:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:25:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 744 transitions. [2023-08-26 15:25:51,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43738977072310403 [2023-08-26 15:25:51,634 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 744 transitions. [2023-08-26 15:25:51,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 744 transitions. [2023-08-26 15:25:51,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:51,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 744 transitions. [2023-08-26 15:25:51,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:51,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:51,639 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:51,639 INFO L175 Difference]: Start difference. First operand has 87 places, 156 transitions, 2098 flow. Second operand 7 states and 744 transitions. [2023-08-26 15:25:51,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 215 transitions, 2971 flow [2023-08-26 15:25:51,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 215 transitions, 2891 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-26 15:25:51,691 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 1497 flow [2023-08-26 15:25:51,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1497, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2023-08-26 15:25:51,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2023-08-26 15:25:51,692 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 1497 flow [2023-08-26 15:25:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:51,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:51,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:25:51,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:51,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1511067317, now seen corresponding path program 3 times [2023-08-26 15:25:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650090399] [2023-08-26 15:25:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:53,160 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 15:25:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650090399] [2023-08-26 15:25:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650090399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:53,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 15:25:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673367420] [2023-08-26 15:25:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 15:25:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 15:25:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-26 15:25:53,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 15:25:53,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 1497 flow. Second operand has 10 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:53,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:53,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 15:25:53,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:53,677 INFO L124 PetriNetUnfolderBase]: 1141/2162 cut-off events. [2023-08-26 15:25:53,677 INFO L125 PetriNetUnfolderBase]: For 20163/20163 co-relation queries the response was YES. [2023-08-26 15:25:53,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13995 conditions, 2162 events. 1141/2162 cut-off events. For 20163/20163 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12981 event pairs, 173 based on Foata normal form. 10/2171 useless extension candidates. Maximal degree in co-relation 13967. Up to 1119 conditions per place. [2023-08-26 15:25:53,687 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 102 selfloop transitions, 58 changer transitions 19/180 dead transitions. [2023-08-26 15:25:53,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 180 transitions, 2504 flow [2023-08-26 15:25:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 626 transitions. [2023-08-26 15:25:53,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42935528120713307 [2023-08-26 15:25:53,690 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 626 transitions. [2023-08-26 15:25:53,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 626 transitions. [2023-08-26 15:25:53,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:53,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 626 transitions. [2023-08-26 15:25:53,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.33333333333333) internal successors, (626), 6 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:53,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:53,694 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:53,694 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 1497 flow. Second operand 6 states and 626 transitions. [2023-08-26 15:25:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 180 transitions, 2504 flow [2023-08-26 15:25:53,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 180 transitions, 2262 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-08-26 15:25:53,728 INFO L231 Difference]: Finished difference. Result has 91 places, 130 transitions, 1746 flow [2023-08-26 15:25:53,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=91, PETRI_TRANSITIONS=130} [2023-08-26 15:25:53,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2023-08-26 15:25:53,729 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 130 transitions, 1746 flow [2023-08-26 15:25:53,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:53,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:53,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:53,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:25:53,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:53,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2009750277, now seen corresponding path program 4 times [2023-08-26 15:25:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:53,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935593111] [2023-08-26 15:25:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:53,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:54,664 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 15:25:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935593111] [2023-08-26 15:25:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935593111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:54,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:54,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:54,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051405282] [2023-08-26 15:25:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:54,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:54,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:54,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 15:25:54,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 130 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:54,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:54,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 15:25:54,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:55,239 INFO L124 PetriNetUnfolderBase]: 1251/2395 cut-off events. [2023-08-26 15:25:55,239 INFO L125 PetriNetUnfolderBase]: For 21997/21997 co-relation queries the response was YES. [2023-08-26 15:25:55,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15362 conditions, 2395 events. 1251/2395 cut-off events. For 21997/21997 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14868 event pairs, 154 based on Foata normal form. 13/2407 useless extension candidates. Maximal degree in co-relation 15332. Up to 932 conditions per place. [2023-08-26 15:25:55,249 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 71 selfloop transitions, 36 changer transitions 104/212 dead transitions. [2023-08-26 15:25:55,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 212 transitions, 3072 flow [2023-08-26 15:25:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:25:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:25:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 730 transitions. [2023-08-26 15:25:55,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42915931804820695 [2023-08-26 15:25:55,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 730 transitions. [2023-08-26 15:25:55,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 730 transitions. [2023-08-26 15:25:55,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:55,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 730 transitions. [2023-08-26 15:25:55,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,257 INFO L175 Difference]: Start difference. First operand has 91 places, 130 transitions, 1746 flow. Second operand 7 states and 730 transitions. [2023-08-26 15:25:55,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 212 transitions, 3072 flow [2023-08-26 15:25:55,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 212 transitions, 2936 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-08-26 15:25:55,295 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 1191 flow [2023-08-26 15:25:55,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2023-08-26 15:25:55,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-26 15:25:55,296 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 1191 flow [2023-08-26 15:25:55,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:55,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:25:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 15:25:55,296 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:55,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1223071253, now seen corresponding path program 5 times [2023-08-26 15:25:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683356179] [2023-08-26 15:25:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:55,493 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 15:25:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683356179] [2023-08-26 15:25:55,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683356179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:55,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:55,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:25:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428075717] [2023-08-26 15:25:55,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:25:55,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:25:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:25:55,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 15:25:55,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 1191 flow. Second operand has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:55,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 15:25:55,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:55,674 INFO L124 PetriNetUnfolderBase]: 325/623 cut-off events. [2023-08-26 15:25:55,674 INFO L125 PetriNetUnfolderBase]: For 7674/7674 co-relation queries the response was YES. [2023-08-26 15:25:55,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 623 events. 325/623 cut-off events. For 7674/7674 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2803 event pairs, 35 based on Foata normal form. 25/646 useless extension candidates. Maximal degree in co-relation 4317. Up to 281 conditions per place. [2023-08-26 15:25:55,677 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 127 selfloop transitions, 11 changer transitions 1/140 dead transitions. [2023-08-26 15:25:55,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 2361 flow [2023-08-26 15:25:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-08-26 15:25:55,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43141289437585734 [2023-08-26 15:25:55,679 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-08-26 15:25:55,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-08-26 15:25:55,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:55,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-08-26 15:25:55,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,683 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 1191 flow. Second operand 6 states and 629 transitions. [2023-08-26 15:25:55,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 2361 flow [2023-08-26 15:25:55,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1901 flow, removed 104 selfloop flow, removed 18 redundant places. [2023-08-26 15:25:55,697 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 957 flow [2023-08-26 15:25:55,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=957, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2023-08-26 15:25:55,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2023-08-26 15:25:55,697 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 957 flow [2023-08-26 15:25:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:55,698 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] [2023-08-26 15:25:55,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 15:25:55,698 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:55,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1742371128, now seen corresponding path program 1 times [2023-08-26 15:25:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266886026] [2023-08-26 15:25:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:55,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:56,071 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 15:25:56,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:56,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266886026] [2023-08-26 15:25:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266886026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869445352] [2023-08-26 15:25:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:56,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:25:56,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:25:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:25:56,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 243 [2023-08-26 15:25:56,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 957 flow. Second operand has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:56,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:56,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 243 [2023-08-26 15:25:56,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:56,454 INFO L124 PetriNetUnfolderBase]: 567/1032 cut-off events. [2023-08-26 15:25:56,455 INFO L125 PetriNetUnfolderBase]: For 7477/7477 co-relation queries the response was YES. [2023-08-26 15:25:56,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6388 conditions, 1032 events. 567/1032 cut-off events. For 7477/7477 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5123 event pairs, 55 based on Foata normal form. 3/1035 useless extension candidates. Maximal degree in co-relation 6364. Up to 435 conditions per place. [2023-08-26 15:25:56,459 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 39 selfloop transitions, 1 changer transitions 131/171 dead transitions. [2023-08-26 15:25:56,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 171 transitions, 2302 flow [2023-08-26 15:25:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:25:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:25:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 752 transitions. [2023-08-26 15:25:56,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442092886537331 [2023-08-26 15:25:56,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 752 transitions. [2023-08-26 15:25:56,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 752 transitions. [2023-08-26 15:25:56,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:56,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 752 transitions. [2023-08-26 15:25:56,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:56,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:56,466 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:56,466 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 957 flow. Second operand 7 states and 752 transitions. [2023-08-26 15:25:56,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 171 transitions, 2302 flow [2023-08-26 15:25:56,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 171 transitions, 2051 flow, removed 44 selfloop flow, removed 9 redundant places. [2023-08-26 15:25:56,478 INFO L231 Difference]: Finished difference. Result has 82 places, 34 transitions, 258 flow [2023-08-26 15:25:56,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=82, PETRI_TRANSITIONS=34} [2023-08-26 15:25:56,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2023-08-26 15:25:56,479 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 34 transitions, 258 flow [2023-08-26 15:25:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:25:56,480 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] [2023-08-26 15:25:56,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 15:25:56,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 15:25:56,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:25:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 601700024, now seen corresponding path program 2 times [2023-08-26 15:25:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:25:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692627954] [2023-08-26 15:25:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:25:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:25:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:25:57,373 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 15:25:57,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:25:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692627954] [2023-08-26 15:25:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692627954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:25:57,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:25:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:25:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665483839] [2023-08-26 15:25:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:25:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:25:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:25:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:25:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:25:57,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 15:25:57,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 34 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:57,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:25:57,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 15:25:57,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:25:57,526 INFO L124 PetriNetUnfolderBase]: 119/240 cut-off events. [2023-08-26 15:25:57,526 INFO L125 PetriNetUnfolderBase]: For 1365/1365 co-relation queries the response was YES. [2023-08-26 15:25:57,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1262 conditions, 240 events. 119/240 cut-off events. For 1365/1365 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 773 event pairs, 37 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 1238. Up to 110 conditions per place. [2023-08-26 15:25:57,527 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2023-08-26 15:25:57,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 49 transitions, 474 flow [2023-08-26 15:25:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:25:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:25:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 599 transitions. [2023-08-26 15:25:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108367626886145 [2023-08-26 15:25:57,529 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 599 transitions. [2023-08-26 15:25:57,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 599 transitions. [2023-08-26 15:25:57,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:25:57,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 599 transitions. [2023-08-26 15:25:57,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:57,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:57,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:57,533 INFO L175 Difference]: Start difference. First operand has 82 places, 34 transitions, 258 flow. Second operand 6 states and 599 transitions. [2023-08-26 15:25:57,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 49 transitions, 474 flow [2023-08-26 15:25:57,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 371 flow, removed 20 selfloop flow, removed 26 redundant places. [2023-08-26 15:25:57,535 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-26 15:25:57,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-26 15:25:57,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-26 15:25:57,536 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-26 15:25:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:25:57,539 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONASSERT (11 of 12 remaining) [2023-08-26 15:25:57,540 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-26 15:25:57,540 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-26 15:25:57,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-26 15:25:57,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-26 15:25:57,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-26 15:25:57,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-26 15:25:57,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (4 of 12 remaining) [2023-08-26 15:25:57,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 12 remaining) [2023-08-26 15:25:57,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 12 remaining) [2023-08-26 15:25:57,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-26 15:25:57,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONASSERT (0 of 12 remaining) [2023-08-26 15:25:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 15:25:57,542 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 3, 2, 1, 1, 1, 1] [2023-08-26 15:25:57,546 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:25:57,546 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:25:57,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:25:57 BasicIcfg [2023-08-26 15:25:57,549 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:25:57,549 INFO L158 Benchmark]: Toolchain (without parser) took 32942.97ms. Allocated memory was 350.2MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 325.1MB in the beginning and 995.1MB in the end (delta: -670.0MB). Peak memory consumption was 616.1MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,549 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 350.2MB. Free memory was 327.1MB in the beginning and 327.0MB in the end (delta: 125.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 564.05ms. Allocated memory is still 350.2MB. Free memory was 324.5MB in the beginning and 297.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,550 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.91ms. Allocated memory is still 350.2MB. Free memory was 297.2MB in the beginning and 293.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,550 INFO L158 Benchmark]: Boogie Preprocessor took 55.47ms. Allocated memory is still 350.2MB. Free memory was 293.6MB in the beginning and 290.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,550 INFO L158 Benchmark]: RCFGBuilder took 910.35ms. Allocated memory was 350.2MB in the beginning and 421.5MB in the end (delta: 71.3MB). Free memory was 290.9MB in the beginning and 381.2MB in the end (delta: -90.2MB). Peak memory consumption was 58.8MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,550 INFO L158 Benchmark]: TraceAbstraction took 31339.06ms. Allocated memory was 421.5MB in the beginning and 1.6GB in the end (delta: 1.2GB). Free memory was 381.2MB in the beginning and 995.1MB in the end (delta: -613.9MB). Peak memory consumption was 601.4MB. Max. memory is 16.0GB. [2023-08-26 15:25:57,552 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 350.2MB. Free memory was 327.1MB in the beginning and 327.0MB in the end (delta: 125.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 564.05ms. Allocated memory is still 350.2MB. Free memory was 324.5MB in the beginning and 297.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.91ms. Allocated memory is still 350.2MB. Free memory was 297.2MB in the beginning and 293.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 55.47ms. Allocated memory is still 350.2MB. Free memory was 293.6MB in the beginning and 290.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 910.35ms. Allocated memory was 350.2MB in the beginning and 421.5MB in the end (delta: 71.3MB). Free memory was 290.9MB in the beginning and 381.2MB in the end (delta: -90.2MB). Peak memory consumption was 58.8MB. Max. memory is 16.0GB. * TraceAbstraction took 31339.06ms. Allocated memory was 421.5MB in the beginning and 1.6GB in the end (delta: 1.2GB). Free memory was 381.2MB in the beginning and 995.1MB in the end (delta: -613.9MB). Peak memory consumption was 601.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 126 PlacesBefore, 42 PlacesAfterwards, 119 TransitionsBefore, 32 TransitionsAfterwards, 2498 CoEnabledTransitionPairs, 7 FixpointIterations, 47 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 121 TotalNumberOfCompositions, 7961 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2400, independent: 2174, independent conditional: 0, independent unconditional: 2174, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1292, independent: 1243, independent conditional: 0, independent unconditional: 1243, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2400, independent: 931, independent conditional: 0, independent unconditional: 931, dependent: 177, dependent conditional: 0, dependent unconditional: 177, unknown: 1292, unknown conditional: 0, unknown unconditional: 1292] , Statistics on independence cache: Total cache size (in pairs): 76, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 151 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 31.2s, OverallIterations: 18, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 649 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 649 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 305 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2880 IncrementalHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 305 mSolverCounterUnsat, 1 mSDtfsCounter, 2880 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2769occurred in iteration=9, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 2650 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:25:57,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...