/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:19:12,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:19:12,468 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:19:12,473 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:19:12,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:19:12,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:19:12,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:19:12,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:19:12,510 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:19:12,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:19:12,513 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:19:12,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:19:12,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:19:12,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:19:12,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:19:12,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:19:12,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:19:12,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:19:12,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:19:12,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:19:12,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:19:12,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:19:12,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:19:12,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:19:12,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:19:12,519 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:19:12,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:19:12,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:19:12,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:19:12,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:19:12,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:19:12,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:19:12,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:19:12,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:19:12,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:19:12,521 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:19:12,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:19:12,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:19:12,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:19:12,870 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:19:12,870 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:19:12,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 18:19:14,152 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:19:14,436 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:19:14,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 18:19:14,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e53c47a/5f93bbcf9bee42c9a47b672e2ffb8985/FLAG5749032ec [2023-08-26 18:19:14,479 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e53c47a/5f93bbcf9bee42c9a47b672e2ffb8985 [2023-08-26 18:19:14,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:19:14,485 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:19:14,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:19:14,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:19:14,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:19:14,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:19:14" (1/1) ... [2023-08-26 18:19:14,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db03ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:14, skipping insertion in model container [2023-08-26 18:19:14,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:19:14" (1/1) ... [2023-08-26 18:19:14,555 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:19:14,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:19:14,965 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:19:14,995 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 18:19:14,997 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 18:19:15,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:19:15,085 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:19:15,085 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:19:15,092 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:19:15,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15 WrapperNode [2023-08-26 18:19:15,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:19:15,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:19:15,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:19:15,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:19:15,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,171 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 160 [2023-08-26 18:19:15,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:19:15,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:19:15,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:19:15,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:19:15,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,199 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:19:15,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:19:15,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:19:15,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:19:15,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (1/1) ... [2023-08-26 18:19:15,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:19:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:19:15,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:19:15,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:19:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:19:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:19:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:19:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:19:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:19:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:19:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:19:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:19:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:19:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:19:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:19:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:19:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:19:15,310 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:19:15,427 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:19:15,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:19:15,792 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:19:15,944 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:19:15,944 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:19:15,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:19:15 BoogieIcfgContainer [2023-08-26 18:19:15,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:19:15,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:19:15,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:19:15,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:19:15,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:19:14" (1/3) ... [2023-08-26 18:19:15,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aeff79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:19:15, skipping insertion in model container [2023-08-26 18:19:15,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:15" (2/3) ... [2023-08-26 18:19:15,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aeff79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:19:15, skipping insertion in model container [2023-08-26 18:19:15,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:19:15" (3/3) ... [2023-08-26 18:19:15,953 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 18:19:15,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:19:15,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 18:19:15,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:19:16,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:19:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 100 transitions, 210 flow [2023-08-26 18:19:16,102 INFO L124 PetriNetUnfolderBase]: 3/98 cut-off events. [2023-08-26 18:19:16,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:16,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 98 events. 3/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 18:19:16,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 100 transitions, 210 flow [2023-08-26 18:19:16,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 98 transitions, 202 flow [2023-08-26 18:19:16,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:19:16,126 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 98 transitions, 202 flow [2023-08-26 18:19:16,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 98 transitions, 202 flow [2023-08-26 18:19:16,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 98 transitions, 202 flow [2023-08-26 18:19:16,157 INFO L124 PetriNetUnfolderBase]: 3/98 cut-off events. [2023-08-26 18:19:16,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:16,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 98 events. 3/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 18:19:16,160 INFO L119 LiptonReduction]: Number of co-enabled transitions 1420 [2023-08-26 18:19:19,861 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-08-26 18:19:19,861 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-26 18:19:19,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:19:19,879 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;@1fbaca9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:19:19,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 18:19:19,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:19:19,880 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:19:19,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:19,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:19,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:19:19,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:19,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash 550, now seen corresponding path program 1 times [2023-08-26 18:19:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:19,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801204974] [2023-08-26 18:19:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:19,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801204974] [2023-08-26 18:19:19,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801204974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:19,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:19,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:19:19,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589151975] [2023-08-26 18:19:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:19:20,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:20,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:19:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:19:20,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2023-08-26 18:19:20,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:20,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2023-08-26 18:19:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:20,208 INFO L124 PetriNetUnfolderBase]: 324/547 cut-off events. [2023-08-26 18:19:20,208 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 18:19:20,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 547 events. 324/547 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2041 event pairs, 324 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 1102. Up to 548 conditions per place. [2023-08-26 18:19:20,213 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 18:19:20,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 82 flow [2023-08-26 18:19:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:19:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:19:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 18:19:20,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730392156862745 [2023-08-26 18:19:20,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 18:19:20,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 18:19:20,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:20,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 18:19:20,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,235 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,237 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 2 states and 193 transitions. [2023-08-26 18:19:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 82 flow [2023-08-26 18:19:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:20,240 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 42 flow [2023-08-26 18:19:20,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-26 18:19:20,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-26 18:19:20,244 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 42 flow [2023-08-26 18:19:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:20,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:19:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:19:20,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:20,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 521753738, now seen corresponding path program 1 times [2023-08-26 18:19:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:20,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024473414] [2023-08-26 18:19:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:20,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:20,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024473414] [2023-08-26 18:19:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024473414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:20,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:19:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580535392] [2023-08-26 18:19:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:19:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:19:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:19:20,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 204 [2023-08-26 18:19:20,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:20,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 204 [2023-08-26 18:19:20,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:20,678 INFO L124 PetriNetUnfolderBase]: 275/468 cut-off events. [2023-08-26 18:19:20,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 468 events. 275/468 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1747 event pairs, 30 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 950. Up to 396 conditions per place. [2023-08-26 18:19:20,684 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 23 selfloop transitions, 2 changer transitions 2/27 dead transitions. [2023-08-26 18:19:20,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 112 flow [2023-08-26 18:19:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 18:19:20,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2023-08-26 18:19:20,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 18:19:20,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 18:19:20,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:20,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 18:19:20,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,693 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 42 flow. Second operand 3 states and 280 transitions. [2023-08-26 18:19:20,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 112 flow [2023-08-26 18:19:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:19:20,694 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 42 flow [2023-08-26 18:19:20,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-08-26 18:19:20,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-26 18:19:20,695 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 42 flow [2023-08-26 18:19:20,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:20,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:20,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:19:20,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:20,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1105756916, now seen corresponding path program 1 times [2023-08-26 18:19:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:20,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626716715] [2023-08-26 18:19:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:20,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626716715] [2023-08-26 18:19:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626716715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:21,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:19:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470366771] [2023-08-26 18:19:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 18:19:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:21,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 18:19:21,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:21,502 INFO L124 PetriNetUnfolderBase]: 182/321 cut-off events. [2023-08-26 18:19:21,502 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 18:19:21,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 321 events. 182/321 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1131 event pairs, 80 based on Foata normal form. 18/339 useless extension candidates. Maximal degree in co-relation 678. Up to 193 conditions per place. [2023-08-26 18:19:21,504 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 18:19:21,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 116 flow [2023-08-26 18:19:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-08-26 18:19:21,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2023-08-26 18:19:21,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-08-26 18:19:21,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-08-26 18:19:21,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:21,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-08-26 18:19:21,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,509 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 42 flow. Second operand 3 states and 246 transitions. [2023-08-26 18:19:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 116 flow [2023-08-26 18:19:21,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:21,510 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 46 flow [2023-08-26 18:19:21,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-08-26 18:19:21,511 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-26 18:19:21,511 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 46 flow [2023-08-26 18:19:21,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:21,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:21,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:19:21,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:21,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2002297359, now seen corresponding path program 1 times [2023-08-26 18:19:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739614870] [2023-08-26 18:19:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:21,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739614870] [2023-08-26 18:19:21,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739614870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:21,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:21,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:19:21,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599544941] [2023-08-26 18:19:21,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:21,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:19:21,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:19:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:19:21,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2023-08-26 18:19:21,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:21,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2023-08-26 18:19:21,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:21,851 INFO L124 PetriNetUnfolderBase]: 172/305 cut-off events. [2023-08-26 18:19:21,852 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 18:19:21,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 305 events. 172/305 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 976 event pairs, 56 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 677. Up to 210 conditions per place. [2023-08-26 18:19:21,854 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 22 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-26 18:19:21,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 111 flow [2023-08-26 18:19:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 18:19:21,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2023-08-26 18:19:21,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 18:19:21,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 18:19:21,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:21,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 18:19:21,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,859 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 46 flow. Second operand 3 states and 274 transitions. [2023-08-26 18:19:21,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 111 flow [2023-08-26 18:19:21,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 105 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:21,861 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 50 flow [2023-08-26 18:19:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-26 18:19:21,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-26 18:19:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 50 flow [2023-08-26 18:19:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:21,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:19:21,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:21,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1859146585, now seen corresponding path program 1 times [2023-08-26 18:19:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:21,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673441563] [2023-08-26 18:19:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:22,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673441563] [2023-08-26 18:19:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673441563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252683077] [2023-08-26 18:19:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 18:19:22,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:22,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:22,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 18:19:22,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:22,885 INFO L124 PetriNetUnfolderBase]: 195/343 cut-off events. [2023-08-26 18:19:22,885 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-26 18:19:22,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 343 events. 195/343 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1165 event pairs, 34 based on Foata normal form. 1/344 useless extension candidates. Maximal degree in co-relation 795. Up to 262 conditions per place. [2023-08-26 18:19:22,887 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 29 selfloop transitions, 13 changer transitions 0/42 dead transitions. [2023-08-26 18:19:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 193 flow [2023-08-26 18:19:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 505 transitions. [2023-08-26 18:19:22,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125816993464052 [2023-08-26 18:19:22,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 505 transitions. [2023-08-26 18:19:22,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 505 transitions. [2023-08-26 18:19:22,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:22,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 505 transitions. [2023-08-26 18:19:22,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:22,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:22,893 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:22,894 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 50 flow. Second operand 6 states and 505 transitions. [2023-08-26 18:19:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 193 flow [2023-08-26 18:19:22,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:22,896 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 134 flow [2023-08-26 18:19:22,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-26 18:19:22,896 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-26 18:19:22,897 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 134 flow [2023-08-26 18:19:22,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:22,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:22,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:22,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:19:22,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:22,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash -860693719, now seen corresponding path program 2 times [2023-08-26 18:19:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727059608] [2023-08-26 18:19:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727059608] [2023-08-26 18:19:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727059608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396563136] [2023-08-26 18:19:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 18:19:23,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:23,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 18:19:23,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:23,951 INFO L124 PetriNetUnfolderBase]: 221/389 cut-off events. [2023-08-26 18:19:23,951 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-08-26 18:19:23,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 389 events. 221/389 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1439 event pairs, 14 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 1240. Up to 254 conditions per place. [2023-08-26 18:19:23,954 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-26 18:19:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 321 flow [2023-08-26 18:19:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 424 transitions. [2023-08-26 18:19:23,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41568627450980394 [2023-08-26 18:19:23,956 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 424 transitions. [2023-08-26 18:19:23,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 424 transitions. [2023-08-26 18:19:23,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:23,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 424 transitions. [2023-08-26 18:19:23,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,962 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,962 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 134 flow. Second operand 5 states and 424 transitions. [2023-08-26 18:19:23,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 321 flow [2023-08-26 18:19:23,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:19:23,967 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 229 flow [2023-08-26 18:19:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-26 18:19:23,969 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-26 18:19:23,970 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 229 flow [2023-08-26 18:19:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:23,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:19:23,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:23,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1697967949, now seen corresponding path program 3 times [2023-08-26 18:19:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:23,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989279406] [2023-08-26 18:19:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:24,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:24,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989279406] [2023-08-26 18:19:24,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989279406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:24,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:24,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:24,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018397500] [2023-08-26 18:19:24,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:24,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:24,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:24,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:24,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 18:19:24,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 229 flow. Second operand has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:24,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:24,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 18:19:24,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:25,096 INFO L124 PetriNetUnfolderBase]: 233/409 cut-off events. [2023-08-26 18:19:25,096 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-26 18:19:25,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 409 events. 233/409 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1524 event pairs, 11 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1539. Up to 260 conditions per place. [2023-08-26 18:19:25,099 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 37 selfloop transitions, 23 changer transitions 0/60 dead transitions. [2023-08-26 18:19:25,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 467 flow [2023-08-26 18:19:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 588 transitions. [2023-08-26 18:19:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-08-26 18:19:25,102 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 588 transitions. [2023-08-26 18:19:25,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 588 transitions. [2023-08-26 18:19:25,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:25,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 588 transitions. [2023-08-26 18:19:25,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,106 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,106 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 229 flow. Second operand 7 states and 588 transitions. [2023-08-26 18:19:25,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 467 flow [2023-08-26 18:19:25,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 450 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:25,110 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 326 flow [2023-08-26 18:19:25,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=326, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-26 18:19:25,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2023-08-26 18:19:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 326 flow [2023-08-26 18:19:25,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:25,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:25,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:19:25,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:25,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1015713461, now seen corresponding path program 4 times [2023-08-26 18:19:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:25,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227850886] [2023-08-26 18:19:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:25,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227850886] [2023-08-26 18:19:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227850886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:25,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:25,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:25,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737364932] [2023-08-26 18:19:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:25,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 18:19:25,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 18:19:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:25,823 INFO L124 PetriNetUnfolderBase]: 255/448 cut-off events. [2023-08-26 18:19:25,824 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-26 18:19:25,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 448 events. 255/448 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1712 event pairs, 34 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 1783. Up to 287 conditions per place. [2023-08-26 18:19:25,827 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 42 selfloop transitions, 25 changer transitions 0/67 dead transitions. [2023-08-26 18:19:25,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 587 flow [2023-08-26 18:19:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2023-08-26 18:19:25,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2023-08-26 18:19:25,830 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2023-08-26 18:19:25,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2023-08-26 18:19:25,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:25,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2023-08-26 18:19:25,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,834 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,834 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 326 flow. Second operand 7 states and 570 transitions. [2023-08-26 18:19:25,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 587 flow [2023-08-26 18:19:25,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 559 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:25,839 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 441 flow [2023-08-26 18:19:25,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-26 18:19:25,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-08-26 18:19:25,840 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 441 flow [2023-08-26 18:19:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:25,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:19:25,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:25,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1933047320, now seen corresponding path program 1 times [2023-08-26 18:19:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:25,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31602082] [2023-08-26 18:19:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:25,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31602082] [2023-08-26 18:19:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31602082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:26,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:26,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048779623] [2023-08-26 18:19:26,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:26,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 204 [2023-08-26 18:19:26,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:26,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 204 [2023-08-26 18:19:26,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:26,971 INFO L124 PetriNetUnfolderBase]: 271/478 cut-off events. [2023-08-26 18:19:26,971 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-26 18:19:26,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 478 events. 271/478 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1881 event pairs, 35 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2142. Up to 391 conditions per place. [2023-08-26 18:19:26,975 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 53 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2023-08-26 18:19:26,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 693 flow [2023-08-26 18:19:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 500 transitions. [2023-08-26 18:19:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084967320261438 [2023-08-26 18:19:26,977 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 500 transitions. [2023-08-26 18:19:26,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 500 transitions. [2023-08-26 18:19:26,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:26,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 500 transitions. [2023-08-26 18:19:26,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,981 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 441 flow. Second operand 6 states and 500 transitions. [2023-08-26 18:19:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 693 flow [2023-08-26 18:19:26,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 662 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:26,987 INFO L231 Difference]: Finished difference. Result has 54 places, 56 transitions, 516 flow [2023-08-26 18:19:26,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=54, PETRI_TRANSITIONS=56} [2023-08-26 18:19:26,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2023-08-26 18:19:26,988 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 56 transitions, 516 flow [2023-08-26 18:19:26,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:26,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:26,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:19:26,989 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:26,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1122713927, now seen corresponding path program 1 times [2023-08-26 18:19:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:26,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252382579] [2023-08-26 18:19:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:27,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:27,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252382579] [2023-08-26 18:19:27,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252382579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:27,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:27,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:27,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446620711] [2023-08-26 18:19:27,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:27,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:27,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:27,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:27,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 18:19:27,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:27,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 18:19:27,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:27,646 INFO L124 PetriNetUnfolderBase]: 333/601 cut-off events. [2023-08-26 18:19:27,646 INFO L125 PetriNetUnfolderBase]: For 1945/1945 co-relation queries the response was YES. [2023-08-26 18:19:27,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 601 events. 333/601 cut-off events. For 1945/1945 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2645 event pairs, 26 based on Foata normal form. 10/611 useless extension candidates. Maximal degree in co-relation 2680. Up to 301 conditions per place. [2023-08-26 18:19:27,651 INFO L140 encePairwiseOnDemand]: 193/204 looper letters, 69 selfloop transitions, 41 changer transitions 4/114 dead transitions. [2023-08-26 18:19:27,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 1097 flow [2023-08-26 18:19:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 18:19:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 18:19:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 891 transitions. [2023-08-26 18:19:27,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2023-08-26 18:19:27,655 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 891 transitions. [2023-08-26 18:19:27,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 891 transitions. [2023-08-26 18:19:27,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:27,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 891 transitions. [2023-08-26 18:19:27,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,662 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,663 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 516 flow. Second operand 11 states and 891 transitions. [2023-08-26 18:19:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 1097 flow [2023-08-26 18:19:27,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 114 transitions, 1056 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:27,671 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 849 flow [2023-08-26 18:19:27,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2023-08-26 18:19:27,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-08-26 18:19:27,673 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 849 flow [2023-08-26 18:19:27,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:27,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:27,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:19:27,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:27,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -790034530, now seen corresponding path program 2 times [2023-08-26 18:19:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938669689] [2023-08-26 18:19:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:28,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938669689] [2023-08-26 18:19:28,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938669689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:28,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:28,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:19:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590964455] [2023-08-26 18:19:28,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:28,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:19:28,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:19:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:19:28,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 18:19:28,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 849 flow. Second operand has 9 states, 9 states have (on average 76.44444444444444) internal successors, (688), 9 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:28,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:28,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 18:19:28,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:29,074 INFO L124 PetriNetUnfolderBase]: 299/537 cut-off events. [2023-08-26 18:19:29,074 INFO L125 PetriNetUnfolderBase]: For 2487/2487 co-relation queries the response was YES. [2023-08-26 18:19:29,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 537 events. 299/537 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2292 event pairs, 50 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 2808. Up to 282 conditions per place. [2023-08-26 18:19:29,079 INFO L140 encePairwiseOnDemand]: 199/204 looper letters, 69 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2023-08-26 18:19:29,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 1135 flow [2023-08-26 18:19:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-08-26 18:19:29,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403921568627451 [2023-08-26 18:19:29,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-08-26 18:19:29,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-08-26 18:19:29,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:29,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-08-26 18:19:29,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,085 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,085 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 849 flow. Second operand 5 states and 412 transitions. [2023-08-26 18:19:29,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 1135 flow [2023-08-26 18:19:29,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 1112 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 18:19:29,106 INFO L231 Difference]: Finished difference. Result has 66 places, 81 transitions, 900 flow [2023-08-26 18:19:29,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=900, PETRI_PLACES=66, PETRI_TRANSITIONS=81} [2023-08-26 18:19:29,106 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-08-26 18:19:29,107 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 81 transitions, 900 flow [2023-08-26 18:19:29,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 76.44444444444444) internal successors, (688), 9 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:29,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:29,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:19:29,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:29,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:29,108 INFO L85 PathProgramCache]: Analyzing trace with hash 449259869, now seen corresponding path program 2 times [2023-08-26 18:19:29,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:29,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159905844] [2023-08-26 18:19:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:29,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:29,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:29,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159905844] [2023-08-26 18:19:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159905844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:29,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:29,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:29,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009192972] [2023-08-26 18:19:29,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:29,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:29,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:29,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 18:19:29,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:29,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 18:19:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:29,731 INFO L124 PetriNetUnfolderBase]: 347/638 cut-off events. [2023-08-26 18:19:29,731 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2023-08-26 18:19:29,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3392 conditions, 638 events. 347/638 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2938 event pairs, 31 based on Foata normal form. 12/650 useless extension candidates. Maximal degree in co-relation 3371. Up to 221 conditions per place. [2023-08-26 18:19:29,736 INFO L140 encePairwiseOnDemand]: 193/204 looper letters, 43 selfloop transitions, 27 changer transitions 88/158 dead transitions. [2023-08-26 18:19:29,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 158 transitions, 1864 flow [2023-08-26 18:19:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 18:19:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 18:19:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 914 transitions. [2023-08-26 18:19:29,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730837789661317 [2023-08-26 18:19:29,740 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 914 transitions. [2023-08-26 18:19:29,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 914 transitions. [2023-08-26 18:19:29,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:29,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 914 transitions. [2023-08-26 18:19:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 83.0909090909091) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,745 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,745 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 900 flow. Second operand 11 states and 914 transitions. [2023-08-26 18:19:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 158 transitions, 1864 flow [2023-08-26 18:19:29,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 158 transitions, 1796 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:19:29,758 INFO L231 Difference]: Finished difference. Result has 81 places, 55 transitions, 691 flow [2023-08-26 18:19:29,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=691, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2023-08-26 18:19:29,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2023-08-26 18:19:29,759 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 691 flow [2023-08-26 18:19:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:29,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:29,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:19:29,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:29,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1959633025, now seen corresponding path program 3 times [2023-08-26 18:19:29,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:29,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463986422] [2023-08-26 18:19:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463986422] [2023-08-26 18:19:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463986422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:30,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976504336] [2023-08-26 18:19:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:30,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:30,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 18:19:30,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 691 flow. Second operand has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:30,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 18:19:30,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:30,826 INFO L124 PetriNetUnfolderBase]: 169/339 cut-off events. [2023-08-26 18:19:30,827 INFO L125 PetriNetUnfolderBase]: For 3572/3572 co-relation queries the response was YES. [2023-08-26 18:19:30,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 339 events. 169/339 cut-off events. For 3572/3572 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1317 event pairs, 22 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 2231. Up to 147 conditions per place. [2023-08-26 18:19:30,830 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 45 selfloop transitions, 32 changer transitions 0/77 dead transitions. [2023-08-26 18:19:30,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 1018 flow [2023-08-26 18:19:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 632 transitions. [2023-08-26 18:19:30,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872549019607843 [2023-08-26 18:19:30,833 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 632 transitions. [2023-08-26 18:19:30,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 632 transitions. [2023-08-26 18:19:30,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:30,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 632 transitions. [2023-08-26 18:19:30,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,837 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,837 INFO L175 Difference]: Start difference. First operand has 81 places, 55 transitions, 691 flow. Second operand 8 states and 632 transitions. [2023-08-26 18:19:30,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 1018 flow [2023-08-26 18:19:30,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 901 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-08-26 18:19:30,848 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 759 flow [2023-08-26 18:19:30,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=759, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-26 18:19:30,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-26 18:19:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 759 flow [2023-08-26 18:19:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:30,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:19:30,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:30,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1422343899, now seen corresponding path program 4 times [2023-08-26 18:19:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:30,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122848513] [2023-08-26 18:19:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122848513] [2023-08-26 18:19:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122848513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382194784] [2023-08-26 18:19:31,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:31,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 18:19:31,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 759 flow. Second operand has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:31,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:31,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 18:19:31,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:31,467 INFO L124 PetriNetUnfolderBase]: 193/392 cut-off events. [2023-08-26 18:19:31,467 INFO L125 PetriNetUnfolderBase]: For 3382/3382 co-relation queries the response was YES. [2023-08-26 18:19:31,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 392 events. 193/392 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1631 event pairs, 44 based on Foata normal form. 12/404 useless extension candidates. Maximal degree in co-relation 2438. Up to 188 conditions per place. [2023-08-26 18:19:31,471 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 50 selfloop transitions, 26 changer transitions 15/91 dead transitions. [2023-08-26 18:19:31,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 1212 flow [2023-08-26 18:19:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2023-08-26 18:19:31,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39338235294117646 [2023-08-26 18:19:31,475 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2023-08-26 18:19:31,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2023-08-26 18:19:31,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:31,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2023-08-26 18:19:31,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:31,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:31,480 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:31,480 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 759 flow. Second operand 8 states and 642 transitions. [2023-08-26 18:19:31,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 1212 flow [2023-08-26 18:19:31,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 1132 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:31,492 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 864 flow [2023-08-26 18:19:31,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2023-08-26 18:19:31,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-08-26 18:19:31,493 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 864 flow [2023-08-26 18:19:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:31,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:31,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:31,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:19:31,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:31,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1340911639, now seen corresponding path program 5 times [2023-08-26 18:19:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179782387] [2023-08-26 18:19:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:32,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179782387] [2023-08-26 18:19:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179782387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:32,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536922091] [2023-08-26 18:19:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:32,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:32,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 204 [2023-08-26 18:19:32,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:32,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 204 [2023-08-26 18:19:32,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:32,311 INFO L124 PetriNetUnfolderBase]: 156/329 cut-off events. [2023-08-26 18:19:32,312 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2023-08-26 18:19:32,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 329 events. 156/329 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1314 event pairs, 44 based on Foata normal form. 11/340 useless extension candidates. Maximal degree in co-relation 2195. Up to 165 conditions per place. [2023-08-26 18:19:32,315 INFO L140 encePairwiseOnDemand]: 197/204 looper letters, 51 selfloop transitions, 19 changer transitions 11/81 dead transitions. [2023-08-26 18:19:32,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 1127 flow [2023-08-26 18:19:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 575 transitions. [2023-08-26 18:19:32,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026610644257703 [2023-08-26 18:19:32,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 575 transitions. [2023-08-26 18:19:32,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 575 transitions. [2023-08-26 18:19:32,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:32,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 575 transitions. [2023-08-26 18:19:32,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,321 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,321 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 864 flow. Second operand 7 states and 575 transitions. [2023-08-26 18:19:32,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 1127 flow [2023-08-26 18:19:32,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 1068 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-26 18:19:32,334 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 805 flow [2023-08-26 18:19:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-26 18:19:32,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-08-26 18:19:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 805 flow [2023-08-26 18:19:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:19:32,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:32,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash 579617396, now seen corresponding path program 1 times [2023-08-26 18:19:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15920068] [2023-08-26 18:19:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:32,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15920068] [2023-08-26 18:19:32,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15920068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:32,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:32,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:32,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050672566] [2023-08-26 18:19:32,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:32,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 18:19:32,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 805 flow. Second operand has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:32,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:32,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 18:19:32,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:33,285 INFO L124 PetriNetUnfolderBase]: 165/355 cut-off events. [2023-08-26 18:19:33,285 INFO L125 PetriNetUnfolderBase]: For 3958/3958 co-relation queries the response was YES. [2023-08-26 18:19:33,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 355 events. 165/355 cut-off events. For 3958/3958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1462 event pairs, 34 based on Foata normal form. 8/363 useless extension candidates. Maximal degree in co-relation 2386. Up to 116 conditions per place. [2023-08-26 18:19:33,289 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 49 selfloop transitions, 23 changer transitions 20/92 dead transitions. [2023-08-26 18:19:33,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 1283 flow [2023-08-26 18:19:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2023-08-26 18:19:33,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2023-08-26 18:19:33,291 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2023-08-26 18:19:33,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2023-08-26 18:19:33,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:33,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2023-08-26 18:19:33,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.75) internal successors, (646), 8 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:33,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:33,296 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:33,296 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 805 flow. Second operand 8 states and 646 transitions. [2023-08-26 18:19:33,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 1283 flow [2023-08-26 18:19:33,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 1232 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-26 18:19:33,307 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 806 flow [2023-08-26 18:19:33,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2023-08-26 18:19:33,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-08-26 18:19:33,308 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 806 flow [2023-08-26 18:19:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:33,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:33,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:19:33,309 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:33,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash -165529610, now seen corresponding path program 2 times [2023-08-26 18:19:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073994420] [2023-08-26 18:19:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:33,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:34,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:34,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073994420] [2023-08-26 18:19:34,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073994420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:34,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:34,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 18:19:34,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660464817] [2023-08-26 18:19:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:34,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:19:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:19:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-26 18:19:34,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 18:19:34,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 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 18:19:34,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:34,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 18:19:34,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:35,023 INFO L124 PetriNetUnfolderBase]: 137/300 cut-off events. [2023-08-26 18:19:35,023 INFO L125 PetriNetUnfolderBase]: For 3804/3804 co-relation queries the response was YES. [2023-08-26 18:19:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 300 events. 137/300 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1198 event pairs, 35 based on Foata normal form. 10/310 useless extension candidates. Maximal degree in co-relation 2033. Up to 151 conditions per place. [2023-08-26 18:19:35,026 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 48 selfloop transitions, 10 changer transitions 23/81 dead transitions. [2023-08-26 18:19:35,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 1187 flow [2023-08-26 18:19:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 630 transitions. [2023-08-26 18:19:35,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860294117647059 [2023-08-26 18:19:35,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 630 transitions. [2023-08-26 18:19:35,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 630 transitions. [2023-08-26 18:19:35,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:35,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 630 transitions. [2023-08-26 18:19:35,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 78.75) internal successors, (630), 8 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:35,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:35,035 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:35,035 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 806 flow. Second operand 8 states and 630 transitions. [2023-08-26 18:19:35,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 1187 flow [2023-08-26 18:19:35,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 1100 flow, removed 26 selfloop flow, removed 8 redundant places. [2023-08-26 18:19:35,047 INFO L231 Difference]: Finished difference. Result has 87 places, 47 transitions, 686 flow [2023-08-26 18:19:35,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=87, PETRI_TRANSITIONS=47} [2023-08-26 18:19:35,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-08-26 18:19:35,048 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 47 transitions, 686 flow [2023-08-26 18:19:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 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 18:19:35,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:35,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:19:35,049 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:35,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash 932962598, now seen corresponding path program 3 times [2023-08-26 18:19:35,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:35,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841429042] [2023-08-26 18:19:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:35,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:36,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841429042] [2023-08-26 18:19:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841429042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:36,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 18:19:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973522409] [2023-08-26 18:19:36,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:36,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:19:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:19:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-26 18:19:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 204 [2023-08-26 18:19:36,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 47 transitions, 686 flow. Second operand has 10 states, 10 states have (on average 69.4) internal successors, (694), 10 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:36,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 204 [2023-08-26 18:19:36,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:36,490 INFO L124 PetriNetUnfolderBase]: 83/186 cut-off events. [2023-08-26 18:19:36,490 INFO L125 PetriNetUnfolderBase]: For 2380/2380 co-relation queries the response was YES. [2023-08-26 18:19:36,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 186 events. 83/186 cut-off events. For 2380/2380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 596 event pairs, 17 based on Foata normal form. 6/192 useless extension candidates. Maximal degree in co-relation 1309. Up to 95 conditions per place. [2023-08-26 18:19:36,492 INFO L140 encePairwiseOnDemand]: 197/204 looper letters, 34 selfloop transitions, 17 changer transitions 12/63 dead transitions. [2023-08-26 18:19:36,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 63 transitions, 881 flow [2023-08-26 18:19:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:19:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:19:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2023-08-26 18:19:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562091503267974 [2023-08-26 18:19:36,494 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2023-08-26 18:19:36,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2023-08-26 18:19:36,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:36,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2023-08-26 18:19:36,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 72.66666666666667) internal successors, (654), 9 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,499 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,499 INFO L175 Difference]: Start difference. First operand has 87 places, 47 transitions, 686 flow. Second operand 9 states and 654 transitions. [2023-08-26 18:19:36,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 63 transitions, 881 flow [2023-08-26 18:19:36,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 717 flow, removed 25 selfloop flow, removed 17 redundant places. [2023-08-26 18:19:36,507 INFO L231 Difference]: Finished difference. Result has 75 places, 40 transitions, 471 flow [2023-08-26 18:19:36,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=75, PETRI_TRANSITIONS=40} [2023-08-26 18:19:36,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-08-26 18:19:36,508 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 40 transitions, 471 flow [2023-08-26 18:19:36,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.4) internal successors, (694), 10 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:36,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:36,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:19:36,508 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:36,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1467495932, now seen corresponding path program 4 times [2023-08-26 18:19:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:36,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501741523] [2023-08-26 18:19:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:36,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501741523] [2023-08-26 18:19:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501741523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:36,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:36,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65597388] [2023-08-26 18:19:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:36,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 204 [2023-08-26 18:19:36,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 40 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:36,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:36,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 204 [2023-08-26 18:19:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:37,039 INFO L124 PetriNetUnfolderBase]: 47/118 cut-off events. [2023-08-26 18:19:37,039 INFO L125 PetriNetUnfolderBase]: For 1262/1262 co-relation queries the response was YES. [2023-08-26 18:19:37,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 118 events. 47/118 cut-off events. For 1262/1262 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 314 event pairs, 22 based on Foata normal form. 8/126 useless extension candidates. Maximal degree in co-relation 682. Up to 76 conditions per place. [2023-08-26 18:19:37,040 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 27 selfloop transitions, 8 changer transitions 11/46 dead transitions. [2023-08-26 18:19:37,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 46 transitions, 592 flow [2023-08-26 18:19:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2023-08-26 18:19:37,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-08-26 18:19:37,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2023-08-26 18:19:37,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2023-08-26 18:19:37,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:37,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2023-08-26 18:19:37,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,046 INFO L175 Difference]: Start difference. First operand has 75 places, 40 transitions, 471 flow. Second operand 6 states and 493 transitions. [2023-08-26 18:19:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 46 transitions, 592 flow [2023-08-26 18:19:37,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 46 transitions, 462 flow, removed 13 selfloop flow, removed 18 redundant places. [2023-08-26 18:19:37,050 INFO L231 Difference]: Finished difference. Result has 63 places, 34 transitions, 313 flow [2023-08-26 18:19:37,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=63, PETRI_TRANSITIONS=34} [2023-08-26 18:19:37,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-26 18:19:37,051 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 34 transitions, 313 flow [2023-08-26 18:19:37,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:37,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:37,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:19:37,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:37,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1751942223, now seen corresponding path program 1 times [2023-08-26 18:19:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:37,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702619496] [2023-08-26 18:19:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702619496] [2023-08-26 18:19:37,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702619496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:37,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:37,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334773273] [2023-08-26 18:19:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:37,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 18:19:37,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 34 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:37,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 18:19:37,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:37,728 INFO L124 PetriNetUnfolderBase]: 42/110 cut-off events. [2023-08-26 18:19:37,729 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2023-08-26 18:19:37,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 110 events. 42/110 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 288 event pairs, 20 based on Foata normal form. 4/114 useless extension candidates. Maximal degree in co-relation 512. Up to 65 conditions per place. [2023-08-26 18:19:37,730 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 26 selfloop transitions, 2 changer transitions 19/47 dead transitions. [2023-08-26 18:19:37,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 467 flow [2023-08-26 18:19:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 559 transitions. [2023-08-26 18:19:37,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914565826330532 [2023-08-26 18:19:37,731 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 559 transitions. [2023-08-26 18:19:37,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 559 transitions. [2023-08-26 18:19:37,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:37,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 559 transitions. [2023-08-26 18:19:37,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,735 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,735 INFO L175 Difference]: Start difference. First operand has 63 places, 34 transitions, 313 flow. Second operand 7 states and 559 transitions. [2023-08-26 18:19:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 467 flow [2023-08-26 18:19:37,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 426 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-26 18:19:37,738 INFO L231 Difference]: Finished difference. Result has 63 places, 27 transitions, 213 flow [2023-08-26 18:19:37,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=63, PETRI_TRANSITIONS=27} [2023-08-26 18:19:37,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-26 18:19:37,739 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 27 transitions, 213 flow [2023-08-26 18:19:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:37,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:37,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:19:37,739 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:37,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1903404415, now seen corresponding path program 2 times [2023-08-26 18:19:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205734325] [2023-08-26 18:19:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205734325] [2023-08-26 18:19:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205734325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:38,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:38,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729246146] [2023-08-26 18:19:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:38,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:38,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:38,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 18:19:38,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 27 transitions, 213 flow. Second operand has 8 states, 8 states have (on average 75.875) internal successors, (607), 8 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:38,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 18:19:38,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:38,245 INFO L124 PetriNetUnfolderBase]: 28/82 cut-off events. [2023-08-26 18:19:38,245 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-08-26 18:19:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 82 events. 28/82 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 199 event pairs, 4 based on Foata normal form. 4/86 useless extension candidates. Maximal degree in co-relation 371. Up to 22 conditions per place. [2023-08-26 18:19:38,246 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 24 selfloop transitions, 8 changer transitions 12/44 dead transitions. [2023-08-26 18:19:38,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 44 transitions, 406 flow [2023-08-26 18:19:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:19:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:19:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 705 transitions. [2023-08-26 18:19:38,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839869281045752 [2023-08-26 18:19:38,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 705 transitions. [2023-08-26 18:19:38,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 705 transitions. [2023-08-26 18:19:38,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:38,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 705 transitions. [2023-08-26 18:19:38,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.33333333333333) internal successors, (705), 9 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,253 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,253 INFO L175 Difference]: Start difference. First operand has 63 places, 27 transitions, 213 flow. Second operand 9 states and 705 transitions. [2023-08-26 18:19:38,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 44 transitions, 406 flow [2023-08-26 18:19:38,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 373 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-26 18:19:38,255 INFO L231 Difference]: Finished difference. Result has 58 places, 25 transitions, 197 flow [2023-08-26 18:19:38,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=197, PETRI_PLACES=58, PETRI_TRANSITIONS=25} [2023-08-26 18:19:38,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2023-08-26 18:19:38,256 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 25 transitions, 197 flow [2023-08-26 18:19:38,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.875) internal successors, (607), 8 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:38,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 18:19:38,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:38,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash -196953629, now seen corresponding path program 3 times [2023-08-26 18:19:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:38,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794615934] [2023-08-26 18:19:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:38,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794615934] [2023-08-26 18:19:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794615934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:38,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:38,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:38,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587475934] [2023-08-26 18:19:38,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:38,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 18:19:38,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 25 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 74.875) internal successors, (599), 8 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 18:19:38,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:38,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 18:19:38,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:38,909 INFO L124 PetriNetUnfolderBase]: 16/51 cut-off events. [2023-08-26 18:19:38,910 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-08-26 18:19:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 51 events. 16/51 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 7 based on Foata normal form. 4/55 useless extension candidates. Maximal degree in co-relation 231. Up to 29 conditions per place. [2023-08-26 18:19:38,910 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-26 18:19:38,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 26 transitions, 246 flow [2023-08-26 18:19:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 530 transitions. [2023-08-26 18:19:38,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711484593837535 [2023-08-26 18:19:38,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 530 transitions. [2023-08-26 18:19:38,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 530 transitions. [2023-08-26 18:19:38,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:38,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 530 transitions. [2023-08-26 18:19:38,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,917 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:38,917 INFO L175 Difference]: Start difference. First operand has 58 places, 25 transitions, 197 flow. Second operand 7 states and 530 transitions. [2023-08-26 18:19:38,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 26 transitions, 246 flow [2023-08-26 18:19:38,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 26 transitions, 204 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 18:19:38,918 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-26 18:19:38,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-26 18:19:38,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-26 18:19:38,919 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-26 18:19:38,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.875) internal successors, (599), 8 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 18:19:38,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (8 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-08-26 18:19:38,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 18:19:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 18:19:38,923 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 4, 3, 2, 1, 1, 1, 1] [2023-08-26 18:19:38,927 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:19:38,927 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:19:38,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:19:38 BasicIcfg [2023-08-26 18:19:38,930 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:19:38,930 INFO L158 Benchmark]: Toolchain (without parser) took 24445.32ms. Allocated memory was 381.7MB in the beginning and 977.3MB in the end (delta: 595.6MB). Free memory was 355.8MB in the beginning and 503.5MB in the end (delta: -147.7MB). Peak memory consumption was 448.9MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,930 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 381.7MB. Free memory was 358.5MB in the beginning and 358.5MB in the end (delta: 18.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:19:38,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 603.99ms. Allocated memory is still 381.7MB. Free memory was 355.8MB in the beginning and 330.0MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.28ms. Allocated memory is still 381.7MB. Free memory was 330.0MB in the beginning and 327.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,931 INFO L158 Benchmark]: Boogie Preprocessor took 55.95ms. Allocated memory is still 381.7MB. Free memory was 326.6MB in the beginning and 324.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,931 INFO L158 Benchmark]: RCFGBuilder took 717.05ms. Allocated memory is still 381.7MB. Free memory was 324.5MB in the beginning and 273.4MB in the end (delta: 51.1MB). Peak memory consumption was 50.3MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,931 INFO L158 Benchmark]: TraceAbstraction took 22981.60ms. Allocated memory was 381.7MB in the beginning and 977.3MB in the end (delta: 595.6MB). Free memory was 272.9MB in the beginning and 503.5MB in the end (delta: -230.6MB). Peak memory consumption was 367.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:38,932 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 381.7MB. Free memory was 358.5MB in the beginning and 358.5MB in the end (delta: 18.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 603.99ms. Allocated memory is still 381.7MB. Free memory was 355.8MB in the beginning and 330.0MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 78.28ms. Allocated memory is still 381.7MB. Free memory was 330.0MB in the beginning and 327.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 55.95ms. Allocated memory is still 381.7MB. Free memory was 326.6MB in the beginning and 324.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 717.05ms. Allocated memory is still 381.7MB. Free memory was 324.5MB in the beginning and 273.4MB in the end (delta: 51.1MB). Peak memory consumption was 50.3MB. Max. memory is 16.0GB. * TraceAbstraction took 22981.60ms. Allocated memory was 381.7MB in the beginning and 977.3MB in the end (delta: 595.6MB). Free memory was 272.9MB in the beginning and 503.5MB in the end (delta: -230.6MB). Peak memory consumption was 367.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 268]: Unsoundness Warning unspecified type, defaulting to int C: short [268] - GenericResultAtLocation [Line: 268]: Unsoundness Warning unspecified type, defaulting to int C: short [268] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 102 PlacesBefore, 30 PlacesAfterwards, 98 TransitionsBefore, 23 TransitionsAfterwards, 1420 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 104 TotalNumberOfCompositions, 3879 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1359, independent: 1214, independent conditional: 0, independent unconditional: 1214, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 808, independent: 761, independent conditional: 0, independent unconditional: 761, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1359, independent: 453, independent conditional: 0, independent unconditional: 453, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 808, unknown conditional: 0, unknown unconditional: 808] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: 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: 18]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 9 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: 22.9s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 523 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 523 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 270 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2186 IncrementalHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 270 mSolverCounterUnsat, 0 mSDtfsCounter, 2186 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=900occurred in iteration=11, InterpolantAutomatonStates: 146, 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, 0.4s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 3534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:19:38,948 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...